Patent Publication Number: US-10321794-B2

Title: Surface cleaning apparatus

Description:
FIELD 
     The subject matter of the teachings described herein relates generally to surface cleaning apparatuses. In one embodiment, the apparatus is an upright surface cleaning apparatus and is optionally operable in a floor cleaning mode and an above floor cleaning mode. 
     BACKGROUND OF THE INVENTION 
     The following is not an admission that anything discussed below is part of the prior art or part of the common general knowledge of a person skilled in the art. 
     Various types of surface cleaning apparatus are known including upright vacuum cleaners and extractors. Typically, an upright vacuum cleaner includes an upper section, including an air treatment member such as one or more cyclones and/or filters, drivingly mounted to a surface cleaning head. An up flow conduit is typically provided between the surface cleaning head and the upper section. In some such vacuum cleaners, a spine, casing or backbone extends between the surface cleaning head and the upper section for supporting the air treatment member. The suction motor may be provided in the upper section. 
     U.S. Pat. No. 7,188,388 (Best) discloses a multi-use vacuum cleaner with a detachable cyclonic vacuum module. The vacuum cleaner may be used as an upright vacuum cleaner when the detachable vacuum module is mounted to the base or the detachable vacuum module may be detached and used by itself. The detachable vacuum module includes a vacuum motor, a motor driven fan, a cyclonic dirt separator and a hose. 
     US patent publication No. US 2015/0096143 (Conrad) discloses an upright vacuum cleaner with a removable hand vacuum cleaner. The upright vacuum cleaner may be used in different cleaning modes including use as an upright vacuum cleaner when the hand vacuum cleaner is mounted to the handle. 
     BRIEF SUMMARY OF THE INVENTION 
     This summary is intended to introduce the reader to the more detailed description that follows and not to limit or define any claimed or as yet unclaimed invention. One or more inventions may reside in any combination or sub-combination of the elements or process steps disclosed in any part of this document including its claims and figures. 
     A surface cleaning apparatus, such as an upright surface vacuum cleaner, may be used to clean floors and other surfaces. When in use, it sometimes desirable to clean beneath furniture and other objects that are resting on the floor, such as beds, couches, tables and the like. Often, the space beneath the furniture (i.e. the distance between the floor and the lower surface of furniture) can be relatively narrow, and may be about 6-8 inches in some instances. Configuring a vacuum cleaner to help clean underneath such furniture, preferably using its primary surface cleaning head, may help users clean hard to access areas. 
     Optionally, a vacuum cleaner can be configured so that its surface cleaning head can fit underneath furniture, and can have a height that is less than the height beneath the furniture. Using such a configuration may allow the vacuum cleaner to extend under furniture up to the depth (front to back) of the surface cleaning head. However, the upper section will limit the extent to which the surface cleaning head can extend under furniture. For example, in Best, the surface cleaning head is not operable when the detachable cyclonic vacuum module has been removed from the upright section. Therefore, when the vacuum cleaner is used to clean under furniture, the extent to which the cleaning head may pass under furniture is limited by the height of the surface cleaning head (from the floor to the upper end of the surface cleaning head) and the depth (front to back) of the upright section. 
     In Conrad, in one mode, the hand vacuum cleaner may be removed from the handle but may remain in air flow communication with the surface cleaning head via a flexible hose. In this mode, the depth of the upright section (front to back) is reduced since the hand vacuum cleaner has been removed. Therefore, the extent to which the depth of the upright section inhibits cleaning under furniture is reduced. However, this design requires a user to remove and carry the hand vacuum cleaner 
     In accordance with this disclosure, an upright surface cleaning apparatus, such as an upright vacuum cleaner, is configured so that the surface cleaning head and at least a portion, and optionally all, of the upright section of the vacuum cleaner is sized to fit beneath furniture having a lower surface positioned close to the floor, such as a bed or a couch. Preferably, the portion of the upright section that can fit underneath the furniture includes a cleaning unit provided on the upper section, which itself may include an air treatment member assembly and suction motor. Configuring the cleaning unit to fit beneath furniture while mounted to the upright section, and making it moveable into a suitable orientation/alignment so as to be moved beneath the furniture, allows part if not all of the upright section to be positioned beneath furniture such that the surface cleaning head may clean the entire floor that underlies furniture. Accordingly, a user may be able to extend a sufficient portion of the upright section of the vacuum cleaner beneath a couch such that the entire area under the couch can be cleaned without requiring the couch to be moved, or the use of secondary cleaning tools like wands and/or crevice tools. 
     When the upright section is rotated rearwardly into an orientation suitable for low profile cleaning (i.e. beneath furniture), the upright section with the air treatment member may extend substantially horizontally from the surface cleaning head (i.e., the upright section may have been rotated rearwardly about 90°). Therefore, if the upright section has a small depth in the forward/backward direction, then the upright section will have a relatively short height in the upward direction when oriented for low profile cleaning. In accordance with one aspect of this disclosure, the depth in the forward/backward direction is generally reduced and the width of the upright section in the left/right, lateral direction may be adjusted so as to be greater than the depth so as to provide a vacuum cleaner which has good dirt separation efficiency and suitable dirt storage capacity for use to clean a house. Optionally, the cleaning unit may have a generally rectangular, slab like configuration, such that it has a generally rectangular shape in a top plan view. 
     To help reduce the depth of the upright section, components of the upright section of the surface cleaning apparatus may be at least partially, and optionally entirely, overlapped with each other. For example, portions of the air flow path may be positioned behind and/or beside portions of the air treatment member assembly. The suction motor may be positioned below, and may underlie at least portions of the air treatment member assembly (including for example, a cyclone chamber and/or a dirt collection chamber). Configuring the components vertically in this manner may help reduce the front/back depth of the cleaning unit. Positioning the suction motor below the air treatment member assembly may help lower the centre of gravity of the upright section, which may help maneuverability. Optionally, the air inlet of the suction motor may be substantially aligned with the air outlet of the air treatment member (such as a cyclone chamber), which may help reduce the overall size of the cleaning unit and/or the length and complexity of the air flow path therethrough. 
     Alternately, or in addition, to help reduce the depth of the upright section/cleaning unit of the surface cleaning apparatus, the amount of material/housings that are provided in front of or behind the operating components (such as the air treatment member assembly and/or the suction motor) may be reduced. For example the cleaning unit (which may comprise one or more air treatment members and the suction motor) may not be provided with a surrounding support structure. Instead, the cleaning unit may itself be rotatably mounted to the surface cleaning head and may have the drive handle attached thereto. 
     Alternately, or in addition, the upright section may be configured such that the air treatment member assembly forms the front and/or rear face of the cleaning unit, and may extend almost the entire depth of the cleaning unit (and optionally the entire depth), such that the overall depth of the cleaning unit may be the depth of the air treatment member assembly. This may help provide an air treatment member assembly that has an acceptable size and dirt collection volume, while keeping the overall depth in an acceptable range. Similarly, the components may be sized such that the depth of the air treatment member assembly is not substantially greater than the depth (i.e. diameter if vertically oriented) of the suction motor, and vice versa. For example, the depth of the air treatment member assembly may be the same as the diameter of the suction motor±2 inches. This may allow both components to be an acceptable size, while helping to keep the overall depth of the cleaning unit in an acceptable range. 
     If the dirt collection region in the apparatus is external the air treatment member, e.g. a dirt collection chamber that is external a cyclone chamber, some and preferably all of the dirt collection region may be positioned laterally beside the cyclone chamber. Accordingly, the dirt collection region may not be positioned forward of the forward most part of the air treatment member and/or rearward of the rearward most part of the air treatment member, thereby reducing the depth of the cleaning unit. The dirt collection region can be located on only one side lateral of the air treatment member, or alternatively dirt collection regions (either discrete regions or portions of a common region) may be positioned on both lateral sides of the cyclone chamber. The volume of the portions of the dirt collection region that are laterally beside the cyclone chamber may be more than 50%, 60%, 70%, 80% or 90% of the total volume of the dirt collection region. Optionally, the dirt outlet on the cyclone chamber may be on a lateral side of the cyclone chamber, and be in communication with the laterally positioned dirt collection chamber. 
     Optionally, portions of the air flow path, including portions of the above floor cleaning assembly may be configured in a non-circular shape, and oriented so that their depth in the forward/rearward direction is less than their length or width. This may help reduce the overall depth of the apparatus while maintaining, and may help nest portions of the air flow path with other portions of the apparatus. 
     Optionally, the apparatus may include additional filters in the air flow path between a dirty air inlet and a clean air outlet, including one or more pre-motor filter(s) and post-motor filter(s). The suction motor may be laterally centered in the cleaning unit, and a post-motor filter and clean air outlet may be provide on at least one, and optionally both of the lateral sides of the suction motor. If on both sides, the cleaning unit may include two clean air outlets, each preceded by a respective post-motor filter. Providing the post-motor filters and clean air outlets on the lateral sides of the suction motor, as opposed to forward or rearward of the suction motor, may help reduce the depth of the cleaning unit and upright section. Optionally, providing a post-motor filter below the suction motor as an alternative to the laterally positioned filters, or in addition thereto, may also help provide a desired amount of filtration while helping to control the overall depth. 
     Preferably, to help move the upright section of the vacuum cleaner beneath an object, at least a portion of the upright section, such as the cleaning unit, may be moveable so as to be oriented into a low profile, generally horizontal position—such that the cleaning unit is substantially parallel to the floor being cleaned. That is, the vacuum cleaner may be configurable in a storage position (where the upright section is generally upright), an upright mode floor cleaning position (where the upright section is inclined rearwardly from the surface cleaning head) and a low profile floor cleaning mode (in which at least the cleaning unit portion of the upright section is parallel or at least substantially parallel to the surface being cleaned). This may help the cleaning unit to be moved beneath the object. 
     To move the cleaning unit into the low profile cleaning position, the drive handle may be bendable or otherwise reconfigurable. This may allow a user to continue holding the same grip portion in the different modes, and may help reduce the need to lower the grip portion down to the floor by requiring a user to bend over. Instead, the grip portion may remain at a more comfortable position, while allowing the cleaning unit to be oriented horizontally. For example, the handle may include a pivot joint or other suitable mechanism, whereby an upper handle portion may be pivotal relative to the cleaning unit. The pivot joint can preferably be lockable, to help a user secure the handle in one or more of its possible positions. 
     To help facilitate above floor cleaning, the surface cleaning apparatus may include an above floor cleaning assembly, which may optionally include a flexible hose and a generally rigid cleaning wand. The wand and hose may form part of the air flow path in the floor cleaning modes as well (and be detached for above floor cleaning), or alternatively may not form part of the air flow path in the floor cleaning mode. 
     In accordance with a first aspect of this disclosure, a surface cleaning apparatus is provided wherein in top plan view, the first and second laterally opposed sides and one of the front side and the rear side of the air treatment member assembly is generally rectangular in top plan view. An advantage of this design is that positioning components of the cleaning unit is this configuration reduces the depth of the cleaning unit. For example, instead of positioning a dirt collection chamber around a cyclone chamber, the dirt collection chamber or chambers may be positioned laterally beside the cyclone chamber and the dirt collections chamber(s) may be square or rectangular in top plan view when the upright section is in the upright position. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus having a surface cleaning head with a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be mounted to the surface cleaning head and may be moveable between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly and a suction motor. The air treatment member assembly may have a longitudinally extending air treatment member assembly axis, first and second laterally opposed sides, a front side and a rear side. The air treatment member assembly may include an air treatment member and a dirt collection region that is positioned laterally from the air treatment member (i.e., lateral being a direction to the right or left side of the surface cleaning apparatus from the perspective of a user standing behind the surface cleaning apparatus and facing forwardly towards the front of the surface cleaning head.). The suction motor may be positioned below at least one of the air treatment member and the dirt collection region. The first and second laterally opposed sides and at least one of the front side and the rear side of the air treatment member assembly may be generally rectangular in top plan view when the upright section is in the upright position. 
     The other of the one of the front side and the rear side of the air treatment member assembly may have a portion that extends outwardly in a direction of the central longitudinal axis of the surface cleaning head when the upright section is oriented to extend generally upwardly from the surface cleaning head. The portion may also extend along a length of the air treatment member assembly in a direction of the longitudinally extending air treatment member assembly axis. 
     The suction motor may underlie at least one of the air treatment member and the dirt collection region. The inlet of the suction motor may be aligned with an air outlet of the air treatment member. 
     The air treatment member may have a dirt outlet provided on a lateral side of the air treatment member. 
     A depth of the air treatment member assembly in a direction of the central longitudinal axis may be about equal to a diameter of the suction motor, and/or may be the same as the diameter of the suction motor±2 inches. 
     A maximum depth of the upright section in a direction of the central longitudinal axis may be 6 inches or less, and may be 4 inches or less. 
     A depth of the air treatment member in a direction of the central longitudinal axis may be about equal to a diameter of the suction motor. 
     The depth of the air treatment member assembly may be the same as the diameter of the suction motor±2 inches. 
     A maximum depth of the upright section in a direction of the central longitudinal axis may be 6 inches or less, and may be 4 inches or less. 
     In accordance with this aspect of the teachings described herein, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be mounted to the surface cleaning head and may be moveable between a generally upright position and a rearwardly inclined in use position. The upright section may include a cyclone bin assembly and a suction motor. The cyclone bin assembly may have a longitudinally extending cyclone bin assembly axis, first and second laterally opposed sides, a front side and a rear side, the air treatment member assembly comprising a cyclone and a dirt collection chamber external to and positioned laterally from the cyclone. The suction motor may be positioned below at least one of the cyclone and the dirt collection chamber. The first and second laterally opposed sides and one of the front side and the rear side of the cyclone bin assembly may be generally rectangular in top plan view when the upright section is in the upright position. 
     The other of the one of the front side and the rear side of the cyclone bin assembly may have a portion that extends outwardly in a direction of the central longitudinal axis of the surface cleaning head when the upright section is oriented to extend generally upwardly from the surface cleaning head. The portion may also extend along a length of the cyclone bin assembly in a direction of the longitudinally extending cyclone bin assembly axis. The portion may be rounded in transverse section. 
     An inlet of the suction motor may be aligned with an air outlet of the cyclone. 
     The cyclone may have a laterally directed dirt outlet. 
     A diameter of the cyclone may be about equal to a diameter of the suction motor. 
     A maximum depth of the upright section in a direction of the central longitudinal axis may be 6 inches or less, and may be 4 inches or less. 
     In accordance with this aspect of the teachings described herein, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be mounted to the surface cleaning head and may be moveable between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly and a suction motor positioned below the air treatment member assembly. The air treatment member assembly may have a longitudinally extending air treatment member assembly axis, first and second laterally opposed sides, a front side and a rear side. The air treatment member assembly may be generally rectangular in top plan view when the upright section is in the upright position other than at least one of the front and rear sides having an outward protrusion that extends in the direction of the longitudinally extending air treatment member assembly axis. 
     A maximum depth of the upright section in a direction of the central longitudinal may be is 6 inches or less, and may be 4 inches or less. 
     In accordance with another aspect of this disclosure, a surface cleaning apparatus has an upper section wherein components are vertically aligned. For example, a push handle of the upper section may be positioned such that the drive axis extends through the air treatment member assembly and the suction motor housing and a rotatable mount of the upper section underlies the upright section when the upright section is in the generally upright position. An advantage of this design is the depth of the upper section may be reduced while providing a maneuverable surface cleaning head. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, rear wheels, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may have a cleaning unit and a push handle. The cleaning unit may include an air treatment member assembly having an air treatment member and a suction motor housing having a suction motor therein. The push handle may include a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member wherein the drive axis extends through the air treatment member assembly and the suction motor housing. A rotatable mount may rotatably mount the upright section with respect to the surface cleaning head about an upright section axis wherein the rotatable mount underlies the upright section when the upright section is in the generally upright position. 
     Axis of rotation of the rear wheels may underlie the air treatment member assembly when the upright section is in the generally upright position. 
     The suction motor may underlie the air treatment member assembly when the upright section is in the generally upright position. 
     The drive axis may be located a distance from the front end of the surface cleaning head that is generally the same as a distance the rotatable mount is located from the front end. 
     The air treatment member assembly may also include a dirt collection region exterior to and laterally spaced with respect to the air treatment member and an up flow duct that is positioned behind the dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the dirt collection region in a direction of the central longitudinal axis. A rear side of the up flow duct may be located proximate a rear side of the air treatment member. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is generally equal to a depth of the dirt collection region in a direction of the central longitudinal axis and a depth of the up flow duct in a direction of the central longitudinal axis. 
     The push handle may be rotatable relative to the cleaning unit about a laterally extending axis wherein the laterally extending axis is positioned above the air treatment member when the upright section is in the generally upright position. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, rear wheels, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may have a cleaning unit and a push handle. The cleaning unit may include an air treatment member assembly having an air treatment member, a dirt collection region exterior to and laterally spaced with respect to the air treatment member and a suction motor housing having a suction motor therein. The suction may be is beneath the air treatment member assembly when the upright section is in the generally upright position. An up flow duct may be positioned behind the dirt collection region. The push handle may include a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member. A rotatable mount may rotatably mount the upright section with respect to the surface cleaning head about an upright section axis. The rotatable mount may underlie the upright section when the upright section is in the generally upright position. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the dirt collection region in a direction of the central longitudinal axis and a rear side of the up flow duct is located proximate a rear side of the air treatment member. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is generally equal to a depth of the dirt collection region in a direction of the central longitudinal axis and a depth of the up flow duct in a direction of the central longitudinal axis. 
     An axis of rotation of the rear wheels may underlie the air treatment member assembly when the upright section is in the generally upright position. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, rear wheels, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include a front face having a forward most portion provided in a front plane that is transverse to a forward direction of travel of the surface cleaning head, a rear face having a rearward most portion provided in a rear plane that is transverse to the forward direction. An air treatment member assembly may include an air treatment member, a dirt collection region exterior to the air treatment member and a suction motor therein. The suction motor may underlie the air treatment member assembly when the cleaning unit is in the generally upright position. A push handle may have a longitudinally extending member with a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member. A rotatable mount may rotatably mount the upright section with respect to the surface cleaning head about an upright section axis. The air treatment member, the dirt collection region an axis of rotation of the rear wheels and the rotatable mount may be located between the front and rear planes. 
     The rotatable mount may underlie the air treatment member assembly when the cleaning unit is in the generally upright position. 
     The axis of rotation of the rear wheels may underlie the air treatment member assembly when the cleaning unit is in the generally upright position. 
     The suction motor may underlie the air treatment member assembly when the cleaning unit is in the generally upright position. 
     The drive axis may be located a distance from the front end of the surface cleaning head that is generally the same as a distance the rotatable mount is located from the front end. 
     The dirt collection region may be laterally spaced with respect to the air treatment member and an up flow duct is positioned behind the dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the dirt collection region in a direction of the central longitudinal axis and a rear side of the up flow duct is located proximate a rear side of the air treatment member. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is generally equal to a depth of the dirt collection region in a direction of the central longitudinal axis and a depth of the up flow duct in a direction of the central longitudinal axis. 
     A maximum depth of the cleaning unit in a direction of the central longitudinal axis may be 6 inches or less and may be 4 inches or less. 
     In accordance with another aspect of this disclosure, a surface cleaning apparatus is provided with a surface cleaning head wherein the rear wheels of the surface cleaning head have a diameter that is greater than a depth of the portion of the dirt collection region that is exterior to the air treatment member. An advantage of this design is the depth of the upper section may be reduced while providing a maneuverable surface cleaning head. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may have a surface cleaning head having a front end, a rear end, rear wheels having a diameter, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly including an air treatment member and a dirt collection region. At least a portion of the dirt collection region may be exterior to and laterally spaced with respect to the air treatment member. A housing may include a suction motor therein. The diameter of the rear wheels may be greater than a depth of the portion of the dirt collection region in a direction of the central longitudinal axis. 
     The housing may have a motor housing portion which houses the suction motor and a lateral portion laterally spaced from the motor housing portion. The lateral portion may have a depth in a direction of the central longitudinal axis that is less than a depth of the central portion. 
     The housing may have a central portion which houses the suction motor and a lateral portion laterally spaced from the central portion wherein the lateral portion has a depth in a direction of the central longitudinal axis that is less than a depth of the central portion. The lateral portion may house a post motor filter. 
     The dirt collection region may be located above the lateral portion when the upright section is in the generally upright position. 
     The motor housing portion may underlie the air treatment member. 
     The air treatment member may include a cyclone chamber and the dirt collection region comprises a dirt collection chamber. 
     The suction motor may be generally laterally aligned with an air outlet of the cyclone chamber. 
     The upright section may include an up flow duct positioned behind the lateral portion. The lateral portion may house a post motor filter. 
     The up flow duct may be located proximate a rear side of the motor housing portion. 
     The motor housing portion may have a depth in a direction of the central longitudinal axis that is generally equal to a depth of the lateral portion in a direction of the central longitudinal axis and a depth of the up flow duct in a direction of the central longitudinal axis. 
     An axis of rotation of the rear wheels may be located rearward of the lateral portion and may underlie the upright section when the upright section is in the generally upright position. 
     The upright section may include a cleaning unit that contains the air treatment member assembly and suction motor and a drive handle extending from an upper end of the cleaning unit. A maximum depth of the cleaning unit in a direction of the central longitudinal axis may 6 inches or less, and may be 4 inches or less. 
     The upright section further may include an up flow duct that has a length in a lateral direction that is transverse to the central longitudinal axis that is greater than a depth of the up flow duct in a direction of the central longitudinal axis. 
     The length of the up flow duct may be more than twice the depth of the up flow duct. The up flow duct may be rectangular or ovaloid. 
     In accordance with another aspect of this disclosure, an upper section of a surface cleaning apparatus utilizes non-rounded air flow ducts. For example, one or more air flow conduits may be a parallelogram in cross section transverse to the air flow direction through the conduit (e.g., square or rectangular), elliptical or the like. The longer dimension of the conduit preferably extends transverse to a central longitudinal axis of the surface cleaning head to thereby increase the lateral dimension of the cleaning unit while reducing the depth of the cleaning unit. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, rear wheels having a diameter, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly having an air treatment member, a suction motor and an air flow duct. The upright section may have a motor receiving portion housing the suction motor and a lateral portion laterally spaced from the motor receiving portion. The air flow duct may be positioned laterally from the motor receiving portion. The air flow duct may have a length in a lateral direction that is transverse to the central longitudinal axis that is greater than a depth of the air flow duct in a direction of the central longitudinal axis. 
     The length of the up flow duct may be more than twice the depth of the up flow duct. The up flow duct may be rectangular or ovaloid in cross-section, and may include an up flow duct. 
     The motor receiving portion that may have a depth in a direction of the central longitudinal axis that is greater than a depth in a direction of the central longitudinal axis of the lateral portion and the air flow duct is provided in front or behind the lateral portion. The lateral portion may house a post motor filter. 
     A depth in a direction of the central longitudinal axis of the motor receiving portion may be approximately the same as a depth of the lateral portion in a direction of the central longitudinal axis and a depth of the air flow duct in a direction of the central longitudinal axis. 
     The surface cleaning head may include an up flow duct, and the upright surface cleaning apparatus may include a rotatable mount rotatably mounting the upright section with respect to the surface cleaning head about an upright section axis. The up flow duct may have a circular cross-sectional area. The air flow duct may be downstream from the up flow duct. 
     The air treatment member may have an air inlet having a shape that is similar to a shape of the air flow duct. 
     The air inlet of the air treatment member may have a height in a direction of a longitudinal axis of the upright section that is ±15% of a depth of the up flow duct in a direction of the central longitudinal axis and the air inlet of the air treatment member has a width in a direction transverse to the longitudinal axis of the upright section that is ±15% of a width of the up flow duct in a lateral direction. 
     The air treatment member assembly may have a dirt collection region external to and laterally spaced from the air treatment member. The dirt collection region may be located above the lateral portion when the upright section is in the generally upright position. 
     The motor receiving portion may underlie the air treatment member. 
     The air treatment member may include a cyclone and the dirt collection region may include a dirt collection chamber. 
     The suction motor may be generally aligned with an air outlet of the cyclone. 
     A flexible conduit may include a downstream end that has a transition member that is removably receivable in the air flow duct. The transition member may have, in cross-section, a length and a width and the length may be greater than the width. 
     The cross-sectional length of the transition member may be more than twice the cross-sectional depth of the transition member. The transition member may be rectangular or ovaloid in cross-section. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, rear wheels having a diameter, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly and may include an air treatment member, a suction motor and an air flow duct. The air flow duct may have a length in a lateral direction that is transverse to the central longitudinal axis that is greater than a depth of the air flow duct in a direction of the central longitudinal axis. A flexible conduit may have a downstream end that has a transition member that is removably receivable in the air flow duct. The transition member, in cross-section, may have a length and a depth and the length may be greater than the depth. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, rear wheels having a diameter, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position, the upright section comprising an air treatment member assembly comprising an air treatment member, a suction motor and an air flow duct. A flexible conduit may have a downstream end that has a transition member. The air flow duct may have a non-circular perimeter in cross-section and the transition member may have a perimeter in cross-section that is comparable to perimeter of the air flow duct. 
     In accordance with another aspect of this disclosure, all or a substantial portion of the dirt collection region is positioned laterally beside the air treatment member. For example, the volume of the portions of the dirt collection region that are laterally beside the cyclone chamber may be more than 50%, 60%, 70%, 80% or 90% of the total volume of the dirt collection region. Accordingly, the depth of the cleaning unit may be reduced by positioning the dirt collection chamber to not be in front and/or behind the air treatment member. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include a cyclone bin assembly having a cyclone chamber and at least one dirt collection chamber exterior to the cyclone. The dirt collection chamber may have a volume and at least 60% of the volume may be positioned laterally from the cyclone. 
     The cyclone chamber has a laterally directed dirt outlet. The laterally directed dirt outlet may include a laterally positioned opening in a sidewall of the cyclone chamber. 
     The cyclone chamber may have first and second lateral sides and the at least one dirt collection chamber may be provided on only the first lateral side of the cyclone chamber. 
     The cyclone bin assembly may have first and second lateral sides and the cyclone chamber is provided on the first lateral side of the cyclone bin assembly and the at least one dirt collection chamber may be provided on the second lateral side of the cyclone bin assembly. 
     The cyclone chamber may have first and second lateral sides and a first dirt collection chamber may be provided on the first lateral side of the cyclone and a second dirt collection chamber may be provided on the second lateral side of the cyclone chamber. 
     The cyclone bin assembly may have first and second lateral sides and the cyclone chamber may be provided centrally between the first and second lateral sides. The dirt collection chamber may be provided on the first lateral side of the cyclone bin assembly and the second dirt collection chamber may be provided on the second lateral side of the cyclone bin assembly. 
     At least 80% of the volume may be positioned laterally from the cyclone chamber. 
     The cyclone chamber may have a depth in a direction of the central longitudinal axis that is greater than a depth of at least a portion of the at least one dirt collection chamber in the direction of the central longitudinal axis. 
     An up flow duct may be positioned behind the portion of the at least one dirt collection chamber. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly having an air treatment member and at least one dirt collection region exterior to the air treatment member. The dirt collection region may have a volume and at least 60% of the volume may be positioned laterally from the air treatment member. 
     The air treatment member may have a laterally directed dirt outlet. The laterally directed dirt outlet may include a laterally positioned opening in a sidewall of the air treatment member. 
     The air treatment member may have first and second lateral sides and the at least one dirt collection region may be provided on only the first lateral side of the air treatment member. 
     The air treatment member assembly has first and second lateral sides and the air treatment member is provided on the first lateral side of the air treatment member assembly and the at least one dirt collection region is provided on the second lateral side of the air treatment member assembly. 
     The air treatment member may have first and second lateral sides and a first dirt collection chamber may be provided on the first lateral side of the air treatment member and a second dirt collection chamber may be provided on the second lateral side of the air treatment member. 
     The air treatment member assembly may have first and second lateral sides, the air treatment member may be provided centrally between the first and second lateral sides. The dirt collection chamber may be provided on the first lateral side of the air treatment member assembly and the second dirt collection chamber may be provided on the second lateral side of the air treatment member assembly. 
     At least 80% of the volume may be positioned laterally from the air treatment member. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of at least a portion of the at least one dirt collection region in the direction of the central longitudinal axis. 
     An up flow duct may be positioned behind the portion of the at least one dirt collection region. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include an air treatment member assembly comprising an air treatment member and a dirt collection region exterior to the air treatment member. The air treatment member may have first and second lateral sides and the dirt collection region may be provided on only the first lateral side of the air treatment member. 
     The air treatment member assembly may have first and second lateral sides and the air treatment member may be provided on the first lateral side of the air treatment member assembly. The dirt collection region may be provided on the second lateral side of the air treatment member assembly. 
     The air treatment member may include a cyclone. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of at least a portion of the at least one dirt collection region in the direction of the central longitudinal axis. 
     An up flow duct may be positioned behind the portion of the at least one dirt collection region. 
     In accordance with another aspect of this disclosure, the push handle of the upright surface cleaning apparatus may be positioned such that a portion of the air treatment member may be positioned laterally thereof. For example, the push handle may be positioned off centre (towards one lateral side of the upper section) thereby enabling the air treatment member to extend further rearwardly and reducing the depth of the cleaning unit. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include a support structure and an air treatment member assembly that includes an air treatment member. The support structure may be positioned rearward of a front face of the air treatment member assembly when the cleaning unit is in the generally upright position. A push handle may include a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member. A lower end of the longitudinally extending member may be mounted to the support structure and a portion of the air treatment member assembly may extend rearward of the longitudinally extending member when the cleaning unit is in the generally upright position. 
     A portion of the air treatment member may extend rearward of the longitudinally extending member when the cleaning unit is in the generally upright position. 
     The longitudinally extending member may extend generally vertically when the cleaning unit is in the generally upright position. 
     The support structure may include an up flow duct and the longitudinally extending member may be mounted to an upper end of the up flow duct. 
     The air treatment member assembly may include a dirt collection region and the up flow duct may be positioned behind the dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of at least a portion of the dirt collection region in the direction of the central longitudinal axis. 
     The up flow duct may be positioned behind the portion of the at least one dirt collection region. 
     The support structure may include first and second laterally spaced struts and a cross member provided on an upper end of the struts. 
     The struts may be positioned behind the air treatment member assembly. 
     The air treatment member assembly may include first and second lateral sides. A first dirt collection region external to the air treatment member may be provided on the first lateral side of the air treatment member assembly and a second dirt collection region external to the air treatment member may be provided on the second lateral side of the air treatment member assembly. A strut may be positioned behind each of the dirt collection regions. The first and second dirt collection regions may be contiguous. 
     The first and second dirt collection regions may be provided on either side of an air treatment member and may be isolated from each other. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of at least a portion of the first and second dirt collection regions in the direction of the central longitudinal axis. 
     The first strut may be positioned behind the portion of the first dirt collection region and the second strut may be positioned behind the portion of the second dirt collection region. 
     The drive axis may extend through the air treatment member assembly. 
     The air treatment member assembly may include a cyclone bin assembly and the air treatment member may include a cyclone. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include a support structure and an air treatment member assembly. The support structure may include first and second laterally spaced struts and a cross member provided on an upper end of the struts. The air treatment member assembly may include an air treatment member, first and second lateral sides, a first dirt collection region external to the air treatment member provided on the first lateral side of the air treatment member assembly and a second dirt collection region external to the air treatment member provided on the second lateral side of the air treatment member assembly. A strut may be positioned behind each of the dirt collection regions. A push handle may include a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member. A lower end of the longitudinally extending member may be mounted to the support structure. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include an up flow duct and an air treatment member assembly comprising an air treatment member. The up flow duct may be positioned rearward of a front face of the air treatment member assembly when the cleaning unit is in the generally upright position. A push handle may include a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member wherein a lower end of the longitudinally extending member is mounted to the up flow duct. 
     The first and second dirt collection regions may be contiguous. 
     The first and second dirt collection regions may be provided on either side of an air treatment member and may be isolated from each other. 
     In accordance with another aspect of this disclosure, the post motor filter(s) and/or the clean air outlet(s) may be provided on one or both lateral sides of the upper section. An advantage of this design is that a post motor filter need not be positioned forward and/or rearward of the suction motor. Therefore, the suction motor may essentially extend from the front to the rear of the cleaning unit thereby reducing the depth of the cleaning unit. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include first and second lateral opposed sides, an air treatment member assembly comprising an air treatment member and a suction motor having first and second lateral sides. Each lateral side of the upright section may have a clean air outlet and a post-motor porous filter media located upstream of the clean air outlet. 
     The post-motor porous filter media may be provided on each lateral side of the suction motor. 
     The post-motor porous filter media may be positioned opposed to and facing each of the lateral sides of the suction motor. The suction motor may be positioned below the air treatment member. 
     The clean air outlets may be provided in a lower portion of the upright section. The post-motor porous filter media may be positioned below the suction motor. 
     The upper section may have a width in a direction transverse to the central longitudinal axis that is more than twice a depth of the upright section in the direction of the central longitudinal axis. The air treatment member may include a cyclone chamber. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include first and second lateral opposed sides, an air treatment member assembly comprising an air treatment member and a suction motor having first and second lateral sides. The first lateral side may have a clean air outlet. A post-motor porous filter media may be located upstream of the clean air outlet. The upper section may have a width in a direction transverse to the central longitudinal axis that is more than twice a depth of the upright section in the direction of the central longitudinal axis. 
     The post-motor porous filter media may be provided on the first lateral side of the suction motor, wherein the first lateral side of the suction motor faces the first lateral side of the upper section. 
     The post-motor porous filter media may be positioned opposed to and facing the first lateral side of the suction motor. The suction motor may be positioned below the air treatment member. The clean air outlet may be provided in a lower portion of the upright section. The air treatment member may include a cyclone. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include first and second lateral opposed sides, an air treatment member assembly comprising an air treatment member, a suction motor having first and second lateral sides and a clean air outlet. Each lateral side of the upright section may include a post-motor porous filter media located upstream of the clean air outlet. The upper section may have a width in a direction transverse to the central longitudinal axis that is more than twice a depth of the upright section in the direction of the central longitudinal axis. 
     The post-motor porous filter media may be positioned opposed to and facing each of the lateral sides of the suction motor. 
     The suction motor may be positioned below the air treatment member. 
     The clean air outlet may be provided in a lower portion of the upright section. 
     The post-motor porous filter media may be positioned below the suction motor. The air treatment member may include a cyclone. 
     In accordance with another aspect of this disclosure, the surface cleaning apparatus may have a telescoping push handle with a pivot joint provided therein. Optionally, one of the telescoping shafts may provide an anti-rotation lock for the pivot joint. An advantage of this design is that a user may position the cleaning unit to extend generally horizontal while still standing in a generally upright position such that the user may maneuver the surface cleaning head under furniture while in a comfortable operating position. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include an air treatment member assembly comprising an air treatment member and a suction motor. A telescoping push handle may include upper and lower telescoping longitudinally extending members which are reconfigurable between a retracted position and a first extended position. The upper telescoping longitudinally extending member may have a longitudinally extending drive axis and a hand grip portion provided at an upper end of the upper longitudinally extending member. The lower telescoping longitudinally extending member may have a first pivot joint provided at an upper end of the lower telescoping longitudinally extending member. The first pivot joint may be non-rotationally locked when the push handle is in the retracted position and the upper telescoping longitudinally extending member may be pivotal about the first pivot joint when the push handle is in the first extended position. 
     The upper telescoping longitudinally extending member may have a first abutment member and the first pivot joint may have a first pivot joint abutment member and the abutment members prevent rotation of the upper telescoping longitudinally extending member when the push handle is in the retracted position. 
     The upper telescoping longitudinally extending member may include a longitudinally extending drive shaft and the first abutment member may include a portion of the outer surface of the drive shaft whereby the portion of the outer surface is exterior to the first pivot joint when the push handle is in the first extended position. 
     The upper telescoping longitudinally extending member may extend through the first pivot joint when the push handle is in the retracted position. 
     The upper telescoping longitudinally extending member may be slideably receivable in the lower telescoping longitudinally extending member. 
     The first pivot joint may be located above the air treatment member. 
     The first pivot joint may overlie the air treatment member. 
     The push handle may be mounted to the cleaning unit. 
     A second pivot joint may be provided on longitudinally extending member and above the first pivot joint. The second pivot joint may be non-rotationally locked when the push handle is in the first extended position and the upper telescoping longitudinally extending member may be pivotal about the second pivot joint when the push handle is in a second extended position. 
     When the upper longitudinally extending member is in the second extended position, the upper longitudinally extending member may be further extended than when the upper longitudinally extending member is in the first extended position. 
     The upper telescoping longitudinally extending member may have a second abutment member and the second pivot joint may have a second pivot joint abutment member and the second abutment member and the second pivot joint abutment member prevent rotation of the upper telescoping longitudinally extending member when the push handle is in the retracted position. 
     The upper telescoping longitudinally extending member may include a longitudinally extending drive shaft and the second abutment member may include a portion of the outer surface of the drive shaft whereby the portion of the outer surface is exterior to the second pivot joint when the push handle is in the second extended position. 
     The upper telescoping longitudinally extending member may extend through the second pivot joint when the push handle is in the retracted position. 
     The second pivot joint may be located above the air treatment member. 
     The second pivot joint may overlie the air treatment member. 
     The upper telescoping longitudinally extending member may have first and second abutment members. The first pivot joint may have a first pivot joint abutment member and the second pivot joint may have a second pivot joint abutment member. The first abutment member and the first pivot joint abutment member may prevent rotation of the upper telescoping longitudinally extending member when the push handle is in the retracted position. The second abutment member and the second pivot joint abutment member may prevent rotation of the upper telescoping longitudinally extending member when the push handle is in the first extended position. 
     The upper telescoping longitudinally extending member may include a longitudinally extending drive shaft. The first abutment member may include a first portion of the outer surface of the drive shaft and the second abutment member may include a second portion of the outer surface of the drive shaft. The first portion of the outer surface may be exterior to the first pivot joint when the push handle is in the first extended position and the second portion of the outer surface may exterior to the second pivot joint when the push handle is in the second extended position. 
     The second portion of the outer surface of the drive shaft may be below the first portion of the outer surface of the drive shaft. 
     The first and second pivot joints may each overlie the air treatment member. 
     The push handle may be mounted to the cleaning unit. 
     In accordance with another aspect of this disclosure, an upright surface cleaning apparatus is provided with a flexible conduit, wherein in a floor cleaning mode the flexible conduit is positioned between a front transverse plane of the cleaning unit and a rear transverse of the cleaning unit. An advantage of this design is that the flexible conduit does not increase the depth of the upper section. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, rear wheels, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include an air treatment member assembly having an air treatment member and a suction motor therein. The cleaning unit may have an upper end, a front side and a rear side and first and second opposed lateral sides. A push handle may have a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion. An above floor cleaning assembly may include a flexible conduit having an inlet end and an outlet end. In a floor cleaning mode the above floor cleaning assembly may be positioned between a front transverse plane that extends transverse to the central longitudinal axis and is located at the front side of the cleaning unit and a rear transverse plane that extends transverse to the central longitudinal axis and is located at the rear side of the cleaning unit. 
     The above floor cleaning assembly may include a rigid conduit that is upstream of the flexible conduit in an above floor cleaning mode. In the floor cleaning mode, the rigid conduit may be located on a first lateral side of the air treatment member, a first portion of the flexible conduit having the outlet end may be located on a second lateral side of the air treatment member. A second portion of the flexible conduit may extend from the second lateral side of the air treatment member over an upper end of the air treatment member to the first lateral side of the air treatment member. 
     The rigid conduit may have an upstream end that in the floor cleaning mode is received in an up flow duct and in an above floor cleaning mode is removed from the up flow duct. 
     The air treatment member assembly may include a first dirt collection region that is located on the first lateral side of the air treatment member and the rigid conduit may be located behind the first dirt collection region. 
     The air treatment member assembly may include a second dirt collection region that is located on the second lateral side of the air treatment member and the first portion of the flexible conduit may be located behind the second dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the first dirt collection region in a direction of the central longitudinal axis. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the first dirt collection region and greater than a depth of the second dirt collection region in a direction of the central longitudinal axis. The drive axis may extend through the air treatment member assembly. 
     The drive axis may extend through the air treatment member assembly and, in the floor cleaning mode, the second portion of the flexible conduit may be positioned in front of the drive axis. In the floor cleaning mode, a rearward extent of a rear side of the above floor cleaning assembly may be at most a rear side of the cleaning unit. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, rear wheels, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include an air treatment member assembly having an air treatment member and a suction motor therein. The air treatment member may have an upper end, a front side and a rear side and first and second opposed lateral sides. A push handle may have a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion. An above floor cleaning assembly may include a flexible conduit having an inlet end and an outlet end. In a floor cleaning mode a front side of the entire above floor cleaning assembly may be positioned forward of a rear side of the air treatment member. 
     The above floor cleaning assembly may include a rigid conduit that is upstream of the flexible conduit in an above floor cleaning mode. In the floor cleaning mode, the rigid conduit may be located on the first lateral side of the air treatment member, a first portion of the flexible conduit having the outlet end may be located on the second lateral side of the air treatment member and a second portion of the flexible conduit may extend from the second lateral side of the air treatment member over the upper end of the air treatment member to the first lateral side of the air treatment member. 
     The rigid conduit may have an upstream end that in the floor cleaning mode is received in an up flow duct and in an above floor cleaning mode is removed from the up flow duct. 
     The air treatment member assembly may include a first dirt collection region that is located on the first lateral side of the air treatment member and the rigid conduit may be located behind the first dirt collection region. 
     The air treatment member assembly may include a second dirt collection region that is located on the second lateral side of the air treatment member and the first portion of the flexible conduit may be located behind the second dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the first dirt collection region in a direction of the central longitudinal axis. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the first dirt collection region and greater than a depth of the second dirt collection region in a direction of the central longitudinal axis. 
     The drive axis may extend through the air treatment member assembly. 
     The drive axis may extend through the air treatment member assembly and, in the floor cleaning mode, the second portion of the flexible conduit may be positioned rearward of the drive axis. 
     In the floor cleaning mode, a rearward extent of a rear side of the above floor cleaning assembly may be at most a rear side of the cleaning unit. 
     In accordance with another aspect of this disclosure, the cleaning unit is provided with a carry handle that extends transversely. An advantage of this design is that the handle does not increase the depth of the upper section. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. An upright section may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The upright section may include a cleaning unit having a carry handle, an air treatment member assembly having an air treatment member, and a suction motor. The air treatment member assembly may have an upper end, a front side and a rear side and first and second opposed lateral sides. The carry handle may extend in a direction transverse to the central longitudinal axis. The carry handle may have a hand grip portion that has a length in the transverse direction that is greater than a depth of the cleaning unit in a direction of the central longitudinal axis. 
     The carry handle may be provided on the upper end of the air treatment member assembly. 
     The carry handle may overlie the upper end of the air treatment member assembly and may be positioned between the front and rear sides of the air treatment member assembly. 
     The air treatment member assembly may be removable from the upright section. 
     The cleaning unit may include a suction motor housing and the air treatment member assembly is removably mounted to an upper end of the suction motor housing. 
     A push handle may include a longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member. A lower end of the longitudinally extending member may be pivotally mounted to the cleaning unit by a pivot joint. The pivot joint may be located above the carry handle when the cleaning unit is in the upright position. The longitudinally extending member may be positioned between the front and rear sides of the air treatment member assembly. 
     A push handle may include an upper and lower longitudinally extending members, the upper longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the upper longitudinally extending member. The lower longitudinally extending member may have a pivot joint provided at an upper end of the lower longitudinally extending member. The pivot joint is located above the carry handle when the upright section is in the upright position. The longitudinally extending member may be positioned between the front and rear sides of the air treatment member assembly. 
     A length of the carry handle in the transverse direction may be greater than twice the depth of the cleaning unit in the direction of the central longitudinal axis. 
     In accordance with this aspect, an upright surface cleaning apparatus may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include a carry handle, an air treatment member assembly comprising an air treatment member, and a suction motor. The air treatment member assembly may have an upper end, a front side and a rear side and first and second opposed lateral sides. A push handle may have a first longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the first longitudinally extending member. A lower end of the first longitudinally extending member may be rotatably mounted with respect to the cleaning unit at a location above the carry handle when the upright section is in the upright position wherein the upper end of the first longitudinally extending member is rotatable forwardly. 
     The first longitudinally extending member may be positioned between the front and rear sides of the air treatment member assembly. 
     The push handle further may include a second longitudinally extending member. The first and second longitudinally extending members may be telescopically mounted with respect to each other. A rotational joint may be provided on the second longitudinally extending member and the lower end of the first longitudinally extending member may be slidably receivable in the rotational joint. The rotational joint may be in a locked position when the lower end of the first longitudinally extending member is received in the rotational joint. 
     The carry handle may be provided on the upper end of the air treatment member assembly, and may overlie the upper end of the air treatment member assembly. 
     The carry handle may be positioned between the front and rear sides of the air treatment member assembly. 
     The air treatment member assembly may be removable from the cleaning unit. 
     The cleaning unit may include a suction motor housing and the air treatment member assembly may be removably mounted to an upper end of the suction motor housing. 
     The carry handle may extend in a direction transverse to the central longitudinal axis. The carry handle may have a hand grip portion that has a length in the transverse direction that is greater than a depth of the cleaning unit in a direction of the central longitudinal axis. 
     The location at which the lower end of the first longitudinally extending member is rotatably mounted with respect to the cleaning unit may overlie the carry handle when the upright section is in the upright position. 
     In accordance with another aspect of this disclosure, an upright surface cleaning apparatus is provided with a push handle that is rotatably mounted with respect to the cleaning unit about a rotational joint located above the air treatment member and a flexible conduit is vertically spaced with respect to the rotational joint. An advantage of this design is that the hose and rotational joint do not increase the depth of the upper section. 
     In accordance with this aspect, there is provided an upright surface cleaning apparatus that may include a surface cleaning head having a front end, a rear end, a central longitudinal axis extending between the front and rear ends, first and second laterally opposed sides, a dirty air inlet and a surface cleaning head air outlet. A cleaning unit may be moveably mounted to the surface cleaning head between a generally upright position and a rearwardly inclined in use position. The cleaning unit may include an air treatment member assembly, having an air treatment member, and a suction motor. The air treatment member may have an upper end, a front side and a rear side and first and second opposed lateral sides. A push handle may include a first longitudinally extending member having a longitudinally extending drive axis and a hand grip portion provided at an upper end of the longitudinally extending member, a lower end of the longitudinally extending member is rotatably mounted with respect to the cleaning unit about a rotational joint located above the air treatment member assembly when the cleaning unit is in the upright position. An above floor cleaning assembly may include a flexible conduit having an inlet end and an outlet end. In a floor cleaning mode a first portion of the flexible conduit having the outlet end may be located on the second lateral side of the air treatment member and a second transverse portion of the flexible conduit may extend from the second lateral side of the air treatment member over the upper end of the air treatment member to the first lateral side of the air treatment member wherein the second transverse portion is vertically spaced from the rotational joint. 
     In the floor cleaning mode, the second transverse portion may be positioned above the rotational joint, and/or may be positioned rearward of the rotational joint. 
     The air treatment member assembly may include a dirt collection region that is located on the second lateral side of the air treatment member and in the floor cleaning mode the first portion of the flexible conduit may be located behind the second dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the dirt collection region in a direction of the central longitudinal axis. 
     A transverse plane that extends transverse to the central longitudinal axis may extend through the air treatment member and the first portion of the flexible conduit. 
     The drive axis may extend through the air treatment member assembly. 
     In the floor cleaning mode, the second transverse portion may be positioned above the rotational joint and/or may be positioned rearward of the rotational joint. 
     The above floor cleaning assembly may include a rigid conduit and the air treatment member assembly may include a first dirt collection region that is located on the first lateral side of the air treatment member and a second dirt collection region that is located on the second lateral side of the air treatment member. In the floor cleaning mode, the rigid conduit may be located behind the first dirt collection region and the first portion of the flexible conduit may be located behind the second dirt collection region. 
     The air treatment member may have a depth in a direction of the central longitudinal axis that is greater than a depth of the first dirt collection region and greater than a depth of the second dirt collection region in a direction of the central longitudinal axis. 
     A transverse plane that may extend transverse to the central longitudinal axis extends through the air treatment member, the first portion of the flexible conduit and the rigid conduit. 
     The drive axis may extend through the air treatment member assembly. 
     In the floor cleaning mode, the second transverse portion is positioned above the rotational joint and/or may be positioned rearward of the rotational joint. 
     The push handle may be mounted to the upright section. 
     The push handle may include a second longitudinally extending member. The first and second longitudinally extending members may be telescopically mounted with respect to each other. A rotational joint may be provided on the second longitudinally extending member and the lower end of the first longitudinally extending member may be slidably receivable in the rotational joint. The rotational joint may be in a locked position when the lower end of the first longitudinally extending member is received in the rotational joint. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The drawings included herewith are for illustrating various examples of articles, methods, and apparatuses of the teaching of the present specification and are not intended to limit the scope of what is taught in any way. 
       In the drawings: 
         FIG. 1  is a front perspective view of one embodiment of a surface cleaning apparatus; 
         FIG. 2  is a rear perspective view of the surface cleaning apparatus of  FIG. 1 ; 
         FIG. 2A  is a rear perspective view of the surface cleaning apparatus of  FIG. 1 , in an above floor cleaning mode; 
         FIG. 2B  is a rear perspective view of the surface cleaning apparatus of  FIG. 1 , with the air treatment member assembly, hose and wand removed; 
         FIG. 2C  is a perspective view from the rear and above of a cross-sectional of the surface cleaning apparatus of  FIG. 2B , taken along line  2 D- 2 D; 
         FIG. 2D  is a top plan cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 2B , taken along line  2 D- 2 D; 
         FIG. 2E  is a perspective view from the rear and above of the cross-sectional view of  FIG. 2D , with the air treatment member assembly attached; 
         FIG. 3  is a front elevation view of the surface cleaning apparatus of  FIG. 1 ; 
         FIG. 4  is a top plan view of the surface cleaning apparatus of  FIG. 1 ; 
         FIG. 5  is a left side view of the surface cleaning apparatus of  FIG. 1 ; 
         FIG. 6  is a rear elevation view of the surface cleaning apparatus of  FIG. 1 ; 
         FIG. 7  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 1 , taken along line  7 - 7  in  FIG. 4 ; 
         FIG. 8  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 1 , taken along line  8 - 8  in  FIG. 4 ; 
         FIG. 9  is a front perspective view of the surface cleaning apparatus of  FIG. 1  with the air treatment member assembly removed; 
         FIG. 10  is a front perspective view of the surface cleaning apparatus of  FIG. 1 , with the air treatment member assembly removed and a bottom emptying door in the open position; 
         FIG. 11  is a front perspective view of the surface cleaning apparatus of  FIG. 1 , with the air treatment member assembly removed and the lid of the air treatment member assembly in an open position; 
         FIG. 12  is a side view of the surface cleaning apparatus of  FIG. 1 , in a low profile floor cleaning mode; 
         FIG. 13  is a perspective view of the surface cleaning apparatus of  FIG. 1 , in the low profile floor cleaning mode; 
         FIG. 14  is a front perspective view of the surface cleaning apparatus of  FIG. 1 , with the handle in a storage position; 
         FIG. 15  is a side view of the surface cleaning apparatus of  FIG. 14 ; 
         FIG. 16  is a front perspective view of the surface cleaning apparatus of  FIG. 1 , with the handle in another storage position; 
         FIG. 17  is a side view of the surface cleaning apparatus of  FIG. 16 ; 
         FIG. 18  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 1 , taken along line  18 - 18  in  FIG. 3 ; 
         FIG. 19  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 1 , taken along line  19 - 19  in  FIG. 3 ; 
         FIG. 20  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 1 , taken along line  20 - 20  in  FIG. 3 ; 
         FIG. 21  is a cross-sectional view of the surface cleaning apparatus of  FIG. 1 , taken along line  21 - 21  in  FIG. 3 ; 
         FIG. 22  is a top perspective view of a portion of the air treatment member assembly with the lid removed; 
         FIG. 23  is a partially cut-away perspective view of the portion of the air treatment member assembly of  FIG. 22 ; 
         FIG. 24  is a top view of the portion of the air treatment member assembly of  FIG. 22 ; 
         FIG. 25  is a partially exploded front perspective view of the surface cleaning apparatus of  FIG. 1 , with the air treatment member assembly and pre-motor filters removed; 
         FIGS. 26 and 27  are front and rear perspective views of another embodiment of a surface cleaning apparatus; 
         FIGS. 28 and 29  are front and rear perspective views of the surface cleaning apparatus of  FIGS. 26 and 27 , with a handle in a storage position; 
         FIG. 30  is a cross-sectional view of a cleaning unit of another embodiment of a surface cleaning apparatus; 
         FIG. 31  is a cross-sectional view of a cleaning unit of another embodiment of a surface cleaning apparatus; 
         FIG. 32  is a partially cut-away perspective view of a portion of the surface cleaning apparatus of  FIG. 31 ; 
         FIG. 33  is a top perspective view of the portion of the cleaning unit of  FIG. 31 ; 
         FIG. 34  is a cross-sectional view of a cleaning unit of another embodiment of a surface cleaning apparatus; 
         FIGS. 35 to 37  are cross-sectional views of different embodiments of an air treatment member assembly for use with a surface cleaning apparatus; 
         FIGS. 38-41  are top perspective views of different embodiments of an air treatment member assembly for use with a surface cleaning apparatus; 
         FIG. 42  is rear perspective view of another embodiment of a surface cleaning apparatus with an above floor cleaning hose being installed; 
         FIG. 43  is a rear perspective view of the surface cleaning apparatus of  FIG. 42 , in an above floor cleaning mode; 
         FIG. 44  is a rear elevation view of the surface cleaning apparatus of  FIG. 42 , in an above floor cleaning mode; 
         FIG. 45  is a cross-sectional view of the surface cleaning apparatus of  FIG. 42 , taken along line  45 - 45  in  FIG. 44 ; 
         FIG. 46  is a cross-sectional view of the surface cleaning apparatus of  FIG. 42 , taken along line  46 - 46  in  FIG. 44 ; 
         FIG. 47  is a cross-sectional view of the surface cleaning apparatus of  FIG. 42 , taken along line  47 - 47  in  FIG. 43 ; 
         FIG. 48  is a cross-sectional view of the surface cleaning apparatus of  FIG. 42 , taken along line  48 - 48  in  FIG. 42 ; 
         FIG. 49  is a front perspective view of another embodiment of a surface cleaning apparatus; 
         FIG. 50  is a rear perspective view of the surface cleaning apparatus of  FIG. 49 ; 
         FIG. 51  is a rear perspective view of the surface cleaning apparatus of  FIG. 49 , with portions of the upright section removed; 
         FIG. 52  is a cross-sectional view of the surface cleaning apparatus of  FIG. 49 , taken along line  52 - 52  in  FIG. 50 ; 
         FIGS. 53 and 54  are front and rear perspective views of another embodiment of a surface cleaning apparatus; 
         FIG. 55  is a front perspective view of the surface cleaning apparatus of  FIG. 53 , with a handle in a storage position; 
         FIG. 56  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 53 , taken along line  55 - 55  in  FIG. 54  with a latch in a first position; 
         FIG. 57  is the cross-sectional view of  FIG. 56 , with the latch in a second position; 
         FIG. 58  is a schematic illustration of another embodiment of a surface cleaning head for use with a surface cleaning apparatus; 
         FIG. 59  is a schematic illustration of another embodiment of a surface cleaning head for use with a surface cleaning apparatus; 
         FIG. 60  is a top view of another embodiment of a surface cleaning apparatus with wheels in a first position 
         FIG. 61  is the top view of  FIG. 60 , with the wheels in a second position; 
         FIG. 62  is a schematic illustration of wheels for use with a surface cleaning apparatus in a first position; 
         FIG. 63  is a schematic illustration of wheels for use with a surface cleaning apparatus in a first position; 
         FIG. 64  is a perspective view of a portion of another embodiment of a surface cleaning apparatus; 
         FIG. 65  is a cross-sectional view of the portion of the surface cleaning apparatus of  FIG. 64 , taken along line  65 - 65 ; 
         FIG. 66  is a perspective view of the portion of the surface cleaning apparatus of  FIG. 64 , with the handle in a second position; 
         FIG. 67  is a cross-sectional view of the portion of the surface cleaning apparatus of  FIG. 66 , taken along line  67 - 67 ; 
         FIG. 68  is a perspective view of the portion of the surface cleaning apparatus of  FIG. 64 , with the handle in a third position; 
         FIG. 69  is a cross-sectional view of the portion of the surface cleaning apparatus of  FIG. 68 , taken along line  69 - 69 ; 
         FIG. 70  is a perspective view of the portion of the surface cleaning apparatus of  FIG. 64 , with the handle in a fourth position; 
         FIG. 71  is a cross-sectional view of the portion of the surface cleaning apparatus of  FIG. 70 , taken along line  71 - 71 ; 
         FIG. 72  is a front perspective view of another embodiment of a surface cleaning apparatus; 
         FIG. 73  is a cross-sectional view of a portion of the surface cleaning apparatus of  FIG. 72 , taken along line  73 - 73 ; 
         FIG. 74  is the cross-sectional view of  FIG. 73 , with the handle in a second position; 
         FIG. 75  is the cross-sectional view of  FIG. 73 , with the handle in a third position; 
         FIG. 76  is the cross-sectional view of  FIG. 73 , with the handle in a fourth position; 
         FIG. 77  is perspective view from above of another embodiment of an air treatment member assembly for use with a surface cleaning apparatus, with an upper door removed; 
         FIG. 78  is a perspective view of a cross-section of the air treatment member assembly of  FIG. 77 , taken along line  78 - 78 ; 
         FIG. 79  is a side elevation view of the cross-section of the air treatment member assembly of  FIG. 78 ; 
         FIG. 80  is a partial-cut away of the perspective view of the air treatment member assembly of  FIG. 77 ; 
         FIG. 81  is the partial cut-away view of  FIG. 80 , with an upper door in place; 
         FIG. 82  is a top plan view of the air treatment member assembly of  FIG. 77 ; 
         FIG. 83  is a bottom perspective view of the air treatment member assembly of  FIG. 77 , with the lower door removed; 
         FIG. 84  is a rear perspective view of the air treatment member assembly of  FIG. 77 , with upper and lower doors open; and, 
         FIG. 85  is a cross-sectional view of the air treatment member assembly of  FIG. 77 , with upper and lower doors open. 
     
    
    
     DETAILED DESCRIPTION 
     Various apparatuses or processes will be described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover processes or apparatuses that differ from those described below. The claimed inventions are not limited to apparatuses or processes having all of the features of any one apparatus or process described below or to features common to multiple or all of the apparatuses described below. It is possible that an apparatus or process described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus or process described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicants, inventors or owners do not intend to abandon, disclaim or dedicate to the public any such invention by its disclosure in this document. 
     The terms “an embodiment,” “embodiment,” “embodiments,” “the embodiment,” “the embodiments,” “one or more embodiments,” “some embodiments,” and “one embodiment” mean “one or more (but not all) embodiments of the present invention(s),” unless expressly specified otherwise. 
     The terms “including,” “comprising” and variations thereof mean “including but not limited to,” unless expressly specified otherwise. A listing of items does not imply that any or all of the items are mutually exclusive, unless expressly specified otherwise. The terms “a,” “an” and “the” mean “one or more,” unless expressly specified otherwise. 
     As used herein and in the claims, two or more parts are said to be “coupled”, “connected”, “attached”, or “fastened” where the parts are joined or operate together either directly or indirectly (i.e., through one or more intermediate parts), so long as a link occurs. As used herein and in the claims, two or more parts are said to be “directly coupled”, “directly connected”, “directly attached”, or “directly fastened” where the parts are connected in physical contact with each other. As used herein, two or more parts are said to be “rigidly coupled”, “rigidly connected”, “rigidly attached”, or “rigidly fastened” where the parts are coupled so as to move as one while maintaining a constant orientation relative to each other. None of the terms “coupled”, “connected”, “attached”, and “fastened” distinguish the manner in which two or more parts are joined together. 
     General Description of a Vacuum Cleaner 
     Referring to  FIGS. 1 to 13 , a first embodiment of a surface cleaning apparatus  100  is shown. The following is a general discussion of this embodiment which provides a basis for understanding several of the features which are discussed herein. As discussed in detail subsequently, each of the features may be used in other embodiments. 
     In the embodiment illustrated, the surface cleaning apparatus  100  is an upright-style vacuum cleaner. Optionally, the surface cleaning apparatus incorporating some or all of the features described herein could alternatively be configured as another suitable type of surface cleaning apparatus, including, for example, an extractor, a stick vac, a wet-dry vacuum cleaner and the like. 
     In this embodiment, the surface cleaning apparatus  100  includes an upright section  102  that is movably and drivingly connected to a surface cleaning head  104 , such that the upright section  102  is movable between an upright position ( FIG. 1 ), such as for storage and optionally when in an above floor cleaning mode, and one or more inclined positions ( FIGS. 12 and 13 ), such as for when the apparatus  100  is operated in a floor cleaning mode to clean floors or other such surfaces. Optionally, the apparatus  100  may be operable in an inclined, upright-style floor cleaning mode as well as a low profile floor cleaning mode ( FIGS. 12 and 13 ), during which some or all of the upright section  102  may be maneuvered underneath relatively low objects, such as furniture. 
     The surface cleaning apparatus  100  also includes at least one dirty air inlet  106  ( FIG. 1 ), at least one clean air outlet  108  and an air flow path or passage extending therebetween. The air flow path may include any suitable combination of air flow conduits, chambers and the like, and may include rigid conduits, flexible conduits (such as hoses) and a combination of rigid and flexible conduits. Optionally, the air flow path may be at least partially reconfigurable, such that two or more dirty air inlets can be connected to the air flow path. In such configurations, the two or more dirty air inlets may be connected to the air flow path in parallel and accessible independently of each other (e.g., each may be used in different cleaning modes). 
     Referring to  FIGS. 1 and 7 , the upright section  102  has a cleaning unit  130  that includes at least one air treatment member assembly  110 , for removing dirt and/or debris from the air flow, and at least one suction motor  112 , for generating the vacuum air flow, are positioned in the air flow path, between the at least one dirty air inlet  106  and the at least one clean air outlet  108 . The air treatment member assembly  110  may be any suitable apparatus, and preferably includes an air treatment member  114  and a dirt collection region  116 , that may be either inside the air treatment member  114  or external the air treatment member  114  as illustrated. Some examples of air treatment members may including, for example, one or more cyclones, filters, and bags, and preferably the at least one air treatment member is provided upstream from the suction motor. The dirt collection region or regions are preferably exterior to and laterally spaced from the air treatment member. Preferably, the air treatment member  114  and/or dirt collection region  116  may be removable from the upright section  102  for emptying and/or maintenance ( FIGS. 10 and 11 ). The suction motor  112  may be housed in a motor housing portion  118 , which in the illustrated embodiment is located beneath the air treatment member assembly  110 . Optionally, the suction motor  112  may be positioned directly beneath the air treatment member  114 , such that the air treatment member  114  (or optionally only portions thereof) overlie at least a portion of the suction motor  112 , and preferably the entire suction motor  112  may be positioned directly beneath air treatment member  114 . This stacked arrangement may help reduce the overall size of the upright section. 
     Optionally, one or more pre-motor filters  120  may be provided in the air flow path between the air treatment member  114  and the suction motor  112 , and/or one or more post-motor filters  122  may be provided in the air flow path downstream from the suction motor  112  and preferably upstream from the clean air outlet  108 . The pre-motor filter  120  and post-motor filter  122  may each be any suitable type of filter, including a physical, porous media type filter such as foam or felt, and optionally may include a HEPA filter. 
     The apparatus  100  also includes a push handle  124  ( FIG. 1 ) that can be used by a user to drive and maneuver the surface cleaning apparatus  100 . The handle  124  may be of any suitable configuration, and in the illustrated embodiment includes an elongate extension member  126  that has a lower end  128  that may be connected to the cleaning unit  130 , a support for the cleaning unit or optionally to the air treatment member assembly  110 , and an upper end  132  that is spaced apart from the lower end along a handle axis  134 , which defines a drive axis of the apparatus  100  when in the upright floor cleaning mode. A hand grip portion  136  that can be grasped by the user may also be provided, and in the illustrated embodiment is located at the upper end  132  of the extension member  126  and forms the upper most portion of the handle  124  (see also  FIG. 5 ). Optionally, the surface cleaning apparatus  100  may be configured so that the upper most portion of the handle  124 , i.e. the handgrip portion  136 , is at a generally comfortable height  138  ( FIG. 5 ) for an average user, and may be positioned between about 36-48, 40-48 or 42-48 inches above the ground when the apparatus  100  is in the upright position. Optionally, the handle  124  may be adjustable, such that the height  138  can be modified. For example, the extension member  126  may be extendible to help provide a desired combination of comfortable heights  138  in both the low profile mode and the upright mode. For example, providing an extendible extension member  126  may allow the height  138  in the upright position to be in a desired range, and may then allow the extension member  126  to be extended to help increase the height  138  between the floor and hand grip  136  in the low profile mode to a desired range (or contracted). The extension of the extension member  126  may be achieved using any suitable mechanism, including configuring the extension member as a telescoping member. In such configurations, the distance between the hand grip and the pivot joint of the handle may be adjusted (see  FIGS. 64-71 ). 
     Surface Cleaning Head 
     The following is a description of a surface cleaning head that may be used by itself in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, any surface cleaning head described herein may be used with any one or more of the moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this embodiment, the surface cleaning head is configured to have a low profile (e.g., it may have a vertical height of less than 6 inches, and more preferably is less than about 4 inches and may be less than 3 inches). Accordingly, the upper and lower surfaces of the surface cleaning head may be generally planar (horizontal) and the suction motor may be provided in the upright section. Rear wheels may be provided which have a large diameter (e.g., larger than or the same height as the surface cleaning head) to enhance stability of the surface cleaning apparatus when in the upright position. 
     Referring to  FIGS. 1, 2, 4 and 5 , in the illustrated embodiment, the surface cleaning head  104  has a front end  140 , a rear end  142  spaced apart from the front end along central longitudinal axis  144 , and laterally spaced apart sides  146 . The surface cleaning head  104  is rollable across the floor or surface to be cleaned in a generally forward/rearward direction that is parallel to the longitudinal axis  144 , and may also be steerable, e.g., by a steering coupling that connects the push handle/upper section to the surface cleaning head, such that the surface cleaning apparatus  100  is not limited to only linear, forward/rearward movements. 
     The surface cleaning head  104  also has an upper surface  148  and an opposed lower surface  150  that faces the floor to be cleaned. The upper and lower surfaces  148  and  150  may have any suitable configuration, and in the present embodiment are each optionally configured as substantially flat, planar surfaces. The upper surface  148  lies generally in an upper plane  152 , and the lower surface  150  lies generally in a lower plane  154 . A vertical distance between the upper and lower planes/surfaces defines a surface cleaning head height  156  ( FIG. 5 ). The height  156  may be any suitable height, and preferably is less than 6 inches, and more preferably is less than about 4 inches and may be less than 3 inches. 
     The downward facing dirty air inlet  106  is provided in the lower surface  150 , and may be positioned toward the front end  140 . Main wheels  158  are provided at the rear end  142  of the surface cleaning head  104 , and are rotatable about a laterally oriented rotation axis  160  ( FIG. 2 ). The wheels  158  may have any suitable diameter  162 , which may be greater than or about the vertical height  156  of the surface cleaning head  104 . The rotation axis  160  of the wheels  158  may be offset from the front end  140  of the surface cleaning head  104  by an offset distance  164  ( FIG. 5 ). This distance may be any suitable distance, and may be selected so that (as illustrated) the wheels  158  extend rearwardly beyond the rear end  142  of the surface cleaning head  104 . This may help stabilize the apparatus  100  when in the upright position. This may also help enhance maneuverability of the apparatus  100  when in use. Optionally, as illustrated in these embodiments, the wheels  158  may be positioned such that the rotation axis  160  is positioned below the cleaning unit  130  when the upright section  102  is in the upright, storage position ( FIG. 5 ). In this configuration, the rotation axis  160  underlies the suction motor  112  and portions of the air treatment member assembly  110 , including the cyclone chamber  188  and dirt collection chamber  190  (see also  FIG. 21 ). This may help improve the stability of the apparatus  100  when in the storage position. 
     In addition to the main wheels  158 , the surface cleaning head  104  may include one or more additional wheels to help rollingly support the surface cleaning head  104 , and the rest of the apparatus  100 , above the floor. For example, smaller front wheels may be provided on the lower surface  150 , toward the front end  140 . 
     Optionally, the surface cleaning head  104  may include a rotating agitating member, such as a brush  168  and the like, positioned at the dirty air inlet  106  to help dislodge debris from the surface being cleaned ( FIG. 21 ). The agitating member may be any known in the art (e.g., a rotatable brush) and may be driven by an electric motor (optionally positioned within the surface cleaning head  104 ), an air powered turbine or other suitable mechanism as is known in the art. 
     The surface cleaning head  104  may be used with a variety of differently configured upright sections  102 , including, for example, the embodiments illustrated in  FIGS. 42-48 and 49-52 . Similarly, a surface cleaning head having a different configuration than the embodiment shown may be used in combination with any of upright sections described herein. 
     It will be appreciated that, as exemplified, the suction motor may be provided in the upper section. Therefore the height of the surface cleaning head may be reduced as it need not include a suction motor, thereby permitting the height of the surface cleaning head to be reduced and to thereby increase the ability of the surface cleaning head to extend under furniture having a small ground clearance. 
     Moveable Wheels 
     The following is a description of moveable wheels that may be used by itself in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the movable wheels described herein may be used with any one or more of the surface cleaning head, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the surface cleaning head may have rear wheels that are moveable in the rearward forward/direction and/or the lateral direction. The movement may be automatic upon reconfiguring the surface cleaning apparatus between different operating positions. For example, the rear wheels may be extended when the upright section is placed in a storage position so as to enhance stability. Alternately or in addition, the rear wheels may be moved laterally inwardly in the floor cleaning position so as to enhance maneuverability. 
     Optionally, the offset distance  164  may be variable and/or adjustable (automatically as the configuration and/or operating mode of apparatus  100  is adjusted, or manually by a user, or a combination of both). In such embodiments, the wheels  158  may be in one location when the upright section  102  is in the upright configuration and a different position when the upright section  102  is in the use configuration. Optionally, the wheels  158  may be moved in the forward/rearward direction (thereby changing the offset distance  164 ) and/or the lateral spacing between the rear wheels may also be adjusted. This may allow the wheel position, balance and/or handling of the apparatus  100  to be adjusted. 
     Accordingly, the rear wheels may be biased to a forward position and the upper section may be drivingly connected to the rear wheels so as to move the rear wheels rearward when the upper section is moved to the upright configuration. Alternately, the rear wheels may be biased to a rearward position and the upper section may be drivingly connected to the rear wheels so as to move the rear wheels forward when the upper section is moved to the inclined floor cleaning position. 
     For example, referring to  FIG. 58 , one embodiment of a wheel deployment mechanism is schematically illustrated. In this embodiment, the axle  170  supporting the rear wheel  158  is translatable in the forward/rearward direction (for example slidable within a slot). A linkage  172  between the upright section  102  and the axle  170  is provided, such that moving the upright section  102  relative to the surface cleaning head  104  translates the axle  170  in the forward/rearward direction. As illustrated, when the upright section  102  is moved into the upright position, a rod  174  is driven backwards and pushes the axle  170  rearward. This may increase the stability of the apparatus  100  when the upright section  102  is in the upright position. When the upright section  102  pivots to the inclined floor cleaning position, the rod  174  is pulled forwardly and/or may be moved forwardly by a biasing member  176  (e.g., the rod may be biased to the forward position by a spring or the like). This may enable axle  170  to move forwardly. Moving the rear wheels forwardly may increase the maneuverability of the surface cleaning head  104  when a push handle is used to drive the surface cleaning head. 
     An alternative embodiment of a linkage  172  is illustrated in  FIG. 59 , in which gear teeth  178  on the upright section  102  engage complimentary teeth on a linkage rod  174  and urge it backward when the upright section  102  is in the upright position. When the upright section  102  is inclined, the teeth  178  disengage, and a biasing spring  176  urges the axle  170  forwardly. In an alternate embodiment, it will be appreciated that the teeth  178  may drive rod both forward and rearward without any biasing member being required. 
     Alternatively, instead of being linked to movement of the upright section  102 , the apparatus may be manually adjustable by a user, such that a user can manually select the forward/rearward position of the wheels  158 . 
       FIGS. 60-63  schematically illustrate an example of an apparatus  100  that can adjust the lateral spacing  180  of the rear wheels  158 , from a relative narrow spacing ( FIG. 60 ) to a relatively wider spacing ( FIG. 61 ). This may also optionally be used in combination with the mechanisms for adjusting the forward/rearward position of the wheels. As illustrated in  FIGS. 62 and 63 , the wheels  158  may be supported on threaded sleeves  182  that can threadingly engage a threaded axle  170 . Rotating the sleeves  182  and axles  170  relative to each other causes the sleeves  182  to translate axially along the axis  160 , thereby changing the lateral wheel spacing  180 . The axle  170  may be rotated using any suitable mechanism, including providing teeth  184  on the axle  170  and using a driving member  186  associated with the upright section  102  for engaging the teeth  184 . The driving  186  member may be independently operable, or may be linked to the movement of the upright section  102  relative to the surface cleaning head  104 . The wheels  158  may be configured to be moveable only in the lateral direction, only in the forward rearward direction, a combination of both types of movement and/or need not be movable at all. 
     Upright Section 
     The following is a description of an upright section that may be used by itself in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the upright section described herein may be used with any one or more of the surface cleaning head, moveable wheels, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the components of the upright section may be arranged to reduce the depth (front to back) of the upright section. It will be appreciated that if the upright section includes a bendable wand such that the surface cleaning apparatus may be reconfigured into the low profile floor cleaning mode of  FIG. 12 , then the depth of the handle does not affect the extent to which the upright section below the bendable portion of the handle can extend under furniture. In such a case, the components of the upright section may be arranged to reduce the depth (front to back) of the cleaning unit. For example, the dirt collection region may be positioned such that it is not located in front of the air treatment member. Alternately or in addition, the dirt collection region may be positioned such that it is not located behind the air treatment member. For example, as exemplified in  FIG. 18 , the dirt collection regions are positioned such that the depth of the air treatment member is the diameter of the cyclone chamber. The dirt collection regions are exemplified as having a greater lateral extent then depth such that they have a rear side that is recessed inwardly (forwardly) compared to the rearward extent of the cyclone chamber. Recessing the rearward side of the dirt collection regions inwardly provides, as exemplified, two recesses in which air flow passages, accessory tools or the like may be positioned. If the components positioned in the recesses do not extend rearward of the rearward extent of the cyclone chamber, then the maximum depth of the upright section that houses the cleaning unit may be the depth of cyclone chamber (i.e. the air treatment member). If the components positioned in the recesses do extend rearward of the rearward extent of the cyclone chamber, then the maximum depth of the upright section that houses the cleaning unit will increase but will still be reduced due to the recessing of the rearward side of the dirt collection regions. 
     It will be appreciated that some of the dirt collection regions may be forward and/or rearward of the air treatment member however this amount is preferably minimized. For example, at least 60%, 70%, 80%, 90% or more of the dirt collection regions is laterally spaced from the air treatment member. It will also be appreciated that the shapes of the dirt collection regions may be varied but still provide one or more recesses for receiving components of the surface cleaning apparatus. 
     In the illustrated embodiments (see  FIGS. 1-25, 26-29, 42-48, 49-52 and 53-57 , the upright section  102  includes a cleaning unit  130  and a push handle  124 . The cleaning unit  130  includes the air treatment member assembly  110 , which is exemplified as a cyclone bin assembly. It will be appreciated that any other air treatment member know in the surface cleaning arts may be used. Referring to  FIGS. 7, 8, 22, 30, 34, 35-41, 45, 52 and 77-85  examples of cyclone bin assemblies wherein the air treatment member  114  is in the form of one of more cyclonic cleaning stages. Each cyclonic cleaning stage may comprise one or more cyclones in parallel. As exemplified, each cyclonic cleaning stage may comprise a single cyclone. Accordingly, there may be a single cyclonic cleaning stage comprising a single cyclone chamber  188 , or two cyclonic cleaning stages, with the first stage comprising a single cyclone chamber  188  and the second cyclonic cleaning stage comprising second cyclone chamber  188   a . Each cyclonic cleaning stage may comprise an external dirt collection chamber. As exemplified, the first cyclonic cleaning stage comprises a dirt collection region  116  in the form of a dirt collection chamber  190  that is external to and in communication with the cyclone chamber  188 , and the second cyclonic cleaning stage comprises a second dirt collection chamber  190   a  that is external to and in communication with the second cyclone chamber  188   a , and is optionally be isolated from the dirt collection chamber  190 . 
     The cleaning unit  130  may also include one or more of a lower housing  192  that houses the pre-motor filter  120  in a pre-motor filter chamber  194 , the suction motor  112  in a motor housing portion and an optional post-motor filter  122  in a post-motor filter chamber  196 . The cleaning unit  130  may also include the clean air outlet(s)  108 . 
     In these embodiments, the lower housing  192  is vertically aligned with the air treatment member and is exemplified as being positioned beneath the air treatment member assembly  110 , and underlies the air treatment member assembly  110 . It will be appreciated that in alternate embodiments, housing  192  may be positioned above and overlying the cleaning unit  130 . 
     As exemplified, the suction motor  112  is positioned below the air treatment member assembly  110 . It will be appreciated that the suction motor  112  may be positioned below and underlie some or all of the cyclone chamber  188 , the dirt collection chamber  190  or some or all of both the cyclone chamber  188  and the dirt collection chamber  190 . 
     As exemplified in  FIGS. 2E, 4, 11 and 20 , the cleaning unit  130  has a low-profile, slab-like configuration. In this embodiment, the cleaning unit  130  has a generally flat front face that defines a front plane  198  ( FIG. 5 ), and a rear face that is bounded by rear plane  200 . In the illustrated example, the rear plane  200  is generally parallel to and offset from the front plane  198 . The planes  198  and  200  are spaced apart from each other in the forward/rearward direction by a cleaning unit depth  201 , which in the illustrated embodiments is the maximum depth of the cleaning unit  130 , and the maximum depth of the portions of the upright section  102  that are likely to be moved beneath furniture or other obstacles. In addition to the front and rear faces, the cleaning unit has opposing side faces  203  that are, in the illustrated embodiment, generally planar and lie in planes  202  ( FIG. 3 ) that are generally parallel to each other and orthogonal to the front and rear planes  198 ,  200 . 
     Optionally, the air treatment member assembly  110  may also be configured to have a low-profile, slab like configuration. Referring to  FIGS. 11 and 22 , in this embodiment, air treatment member assembly  110  has a generally flat front face  242  (see also  FIGS. 9-11 and 22 ) which lies in the front plane  198  when the air treatment member assembly  110  is mounted on the cleaning unit  130 . The air treatment member assembly  110  also has a rear face  246  that is formed by a centrally positioned cyclone chamber  188  and a dirt collection region  116  on each lateral side thereof. In this embodiment, a rear plane  199  ( FIGS. 18 and 22 ) is located forward of the rearward extent of the cleaning unit  130  but may alternately be located at or essentially at plane  200 . In this case rear plane  199  is at the rearward extent of the cyclone chamber  188 , and is generally parallel to and offset from the front face  242  and front plane  198 . The front face  242  and rear plane  199  are spaced apart from each other in the forward/rearward direction by an air treatment member assembly depth  256 , which in the illustrated embodiments is the maximum depth of the cyclone chamber  188 . In addition to the front  242  and rear faces  246 , the cleaning unit has opposing side faces  248  ( FIG. 22 ) that are, in the illustrated embodiment, generally planar and lie in planes  202  when the air treatment member assembly  110  is mounted to the cleaning unit. The side faces  248  are illustrated as being generally orthogonal to the front face  242 , but may have other configurations. 
     As exemplified in  FIGS. 11 and 22 , the cyclone chamber  188  may extend rearwardly of dirt collection regions  116 , so as to define a generally rounded protrusion  247  extending in the direction of cleaning unit axis  204 , which may also define an air treatment member assembly axis. Accordingly, the first and second laterally opposed sides  248  and the front side  242  of the air treatment member assembly  110  are generally rectangular in top plan view when the upright section is in the upright position. Alternately, or in addition, the protrusion  247  may be on the front side and/or the front and rear sides of the cyclone assembly. The protrusion  247  may extend the entire length/height of the air treatment member assembly  110  in the axial direction, or may only extend along a portion of the length of the air treatment member assembly  110 . Accordingly, other than the optional protrusion, the air treatment member assembly  110  has a generally rectangular perimeter and/or cross-sectional shape, taken in a plane that is orthogonal to a cleaning unit axis  204  (i.e. in a top plan view). This configuration may be selected to be complimentary with the shape of the cleaning unit  130 , so that when the air treatment member assembly  110  is mounted to the cleaning unit  130  the planes  198 ,  200  and  202  define or essentially define the limits of the cleaning unit  130  and provide a generally rectangular perimeter and/or cross-sectional shape taken in the plane that is orthogonal to the cleaning unit axis  204 . 
     The cleaning unit  130  also has an upper end  206  and an opposed lower end  208 . The upper and lower ends  206  and  208  may have any suitable configuration. As exemplified, the lower end  208  may have a generally flat lower face  210  that is orthogonal to the front and rear planes  198 ,  200  so as to seat on the lower housing  192  and provide a seal. 
     Optionally, the air treatment member assembly  110  may be part of the structural connection of push handle  124  to the surface cleaning head. Accordingly, the air treatment member assembly  110  may provide substantially the entire upper end  206  of the cleaning unit  130 . For example, the push handle  124  may be mounted to the air treatment member assembly  110  and the cleaning unit  130  may be moveably mounted to the surface cleaning head (e.g., it may be mounted to a pivotally mounted up flow duct. In such a case, the dirt collection region(s) may be removable from the cleaning unit  130  for emptying. 
     Alternately, the air treatment member assembly  110  may be supported by components of the cleaning unit  130  and/or upright section  102  (e.g. lower housing  192  and support structure  212 ) so as to be removable from the upright section to enable the dirt collection regions to be emptied. As exemplified, the upright section comprises an upwardly extending support structure  212  ( FIGS. 2, 2B-2E, 10, 11, 42, 50 ) that provides a structural connection between the lower housing  192  and the handle  124 . Optionally, support structure  212  may support or assist in supporting the air treatment member assembly  110  and the air treatment member assembly  110  may be releasably securable thereto. 
     The support structure  212  may be of any configuration and may comprise one or more vertically extending members (e.g., struts  214 ), which may be connected to each other by a connecting web  215  and may provide rigidity such that push handle  124  may be used to drive the surface cleaning head  104 . For example, the support structure may be moveably mounted to the surface cleaning head  104  and provide a structural support for lower housing  192  and air treatment member assembly  110 . An upper portion of the support structure  212  may be connected to the handle  124 . It will be appreciated that if air treatment member assembly  110  is support by support structure  212 , that handle  124  may be mounted to the air treatment member assembly  110 . In such a case, the dirt collection region(s) may be removably mounted to the air treatment member assembly  110  for emptying. Alternately, lower portion  192  may itself be mounted to the surface cleaning head  104  and support structure  212  may extend along the length of the cleaning unit. In such a case, the upper portion of the support structure  212  may be connected to the handle  124  or the push handle  124  may be mounted to the air treatment member assembly  110 . 
     In any such embodiment, the vertically extending members may extend generally upwardly along one of the front and rear side, preferably the rear side  246 , of the air treatment member assembly  110 . As exemplified, struts  214  may be provided at least partially recessed within the recesses  249  ( FIGS. 2E, 18, 22 and 23 ) created by recessing the dirt collection regions  116  forward of the rearward extent of the cyclone chamber  188  and plane  199 . It will be appreciated that the struts  214  may be fully recessed such that they do not extend rearward of plane  199 . By recessing a portion of the struts  214 , the overall depth of the portion of the upright section  102  that extends along the air treatment member assembly  110  may be reduced. 
     In the illustrated embodiment, the struts  214  are configured as generally flat, plates that have a width  251  ( FIG. 2C ) in the lateral direction that is much greater than their depth (i.e. wall thickness  253 ) in the forward/rearward direction (which in this embodiment is the thickness of the plate forming the strut  214 ). Alternatively, the struts  214  may have other configurations. 
     Optionally, while the struts  214  are nested with the air treatment member assembly  110 , a portion of support structure  212 , such as the connecting web  215  may extend rearwardly of plane  199 . The connecting web  215  may be configured to have a relatively thin depth in the forward/rearward direction, to help reduce the overall thickness of the cleaning unit  130 , and in the illustrated example has the same wall thickness  253  as the struts  214 . Optionally, the connecting web  215  may extend along the rear side of the protrusion  247  and may be positioned between the cyclone chamber  188  and the rear plane  200 . Preferably, the connecting web  215  is located immediately at rear plane  199 . 
     By connecting push handle  124  to an upper end of support structure  212 , the air treatment member assembly  110  may be removeable from the cleaning unit  130  ( FIGS. 10 and 11 ) without requiring removal of the handle  124 , support structure  212 , lower housing  192  or other portions of the cleaning unit  130 . This may also eliminate the need for the air treatment member assembly  110  to be a load bearing member, which may help simplify its construction and may allow for a lighter weight construction. For example, as exemplified in  FIGS. 4, 10 and 11 , the support structure  212  includes the laterally spaced apart struts  214 , and a cross-member  216  that extends laterally between the upper ends of the struts  214  to support the handle  124 . Optionally, as shown in the illustrated embodiments, the cross-member  216  may also include one or more functional components of the apparatus  100 , such as a power button  219  ( FIG. 4 ) for controlling the suction motor  112 . Alternatively, the power button  219  may be located at another location, including on the handle  124 , possibly on the hand grip  136 , on the surface cleaning head  104 , other portions of the cleaning unit  130  and the like. 
     Optionally, the region between the struts  214  may be open, i.e. substantially free of connecting walls or structures, such that the rear sides of the air treatment member assembly  110  is exposed when seated on the cleaning unit  130 . This may help reduce the weight of the cleaning unit  130 . Alternatively, as illustrated in the embodiment of  FIGS. 2B-E  and  18 , the support structure  212  may include the connecting web  215  that spans between the struts  214 . The connecting web  215  may help provide structural strength, and may provide a location to anchor the downstream end of the hose  113 , and may support the transition member  344 , further described herein, that provides air flow communication between the hose  113  and the air treatment member assembly  110 . Alternatively, if the region between the struts  214  is open, the transition member  344  may be cantilevered from one of the struts  214  to be positioned adjacent the air treatment member assembly  110  inlet  284 . 
     Preferably, the hose  113  and a transition member  344  are laterally offset from the cyclone chamber  188 , and may be at least partially nested within the recess  249  on the back of the air treatment member assembly  110 , which may help reduce the overall depth  201  of the cleaning unit. As illustrated in  FIGS. 18 and 2E , in the present embodiment portions of the hose  113  and transition member  344  are positioned forward of the plane  199  that defines the rearmost extent of the air treatment member assembly  110 . In this arrangement, a portion of the strut  214  is positioned between the dirt collection region  116  and the connector member transition member and hose  113 . 
     Together, the struts  214  and connecting web  215  may be configured to define a cavity  217  ( FIGS. 2C and 2E ) that has a complimentary shape to the rear side of the air treatment member assembly, and in the illustrated example is configured to receive the protrusion  247  on the rear side of the air treatment member assembly. Alternatively, the struts  214  and connecting web  215  may be generally flush with each other. For example, if the air treatment member assembly  110  of  FIG. 40  is used a cavity  217  may not be needed because the rear face of the air treatment member assembly  110  is flat and lies in the plane  199 . 
     The embodiments of  FIGS. 42-52  may have an analogous configuration. 
     In addition to supporting the handle  124 , the support structure  212  may also be configured to include one or more air flow ducts (e.g., an up flow duct to the air treatment member assembly) at least a portion of a locking mechanism or the like for securing the air treatment member assembly  110  to the cleaning unit  130  if the air treatment member is separately removable, at least a portion of a locking mechanism or the like for securing the cleaning unit  130  to the support structure if the cleaning unit  130  is removably mounted to the support structure, a brush control actuator, storage locations for auxiliary cleaning tools and the like. 
     In the illustrated embodiments, the air treatment member assembly  110  is removably mounted to the cleaning unit  130  and the locking mechanism for securing the air treatment member assembly  110  includes a latch provided on the air treatment member assembly, and a complimentary catch portion on the cleaning unit. Referring, for example, to  FIGS. 1 and 10 , the latch  218 , which includes an integrated actuator button portion, is provided on the air treatment member assembly and can engage a corresponding catch portion  220  on the cross-member  216  of the cleaning unit  130 . When a user presses on the exposed button portion, the latch  218  can be disengaged from the catch portion  220 , thereby allowing the air treatment member assembly to be removed. Any locking mechanism known in the mechanical arts may be used. 
     The support structure  212  may also include one or more air flow ducts that form part of the air flow path between the dirty air inlet(s)  106  and the air treatment member assembly  110 . Such ducts may be integrally formed and/or internal of the support structure  212 , or may be external conduits connected to the support structure (such as wands, pipes and hoses). 
     It will be appreciated that, in some embodiments, the airflow conduit from the surface cleaning head  104  to the air treatment member assembly  110  may include a rigid cleaning wand  222  and/or a flexible hose  113  (see e.g.,  FIGS. 18-20 ). The upright section may also include an up flow conduit, in the form of an up flow duct  224  provided on the cleaning unit  130  ( FIG. 8 ), which fluidly connects an air exit of the surface cleaning head  104  to the cleaning wand  222 . The inlet end  226  of the wand  222  may be detachably inserted into or otherwise connected in air flow communication to the up flow duct  224  (or vice versa) to complete the air flow path ( FIG. 2A ). Detachably connecting the wand to the air flow path enables the apparatus to be reconfigured for above floor cleaning. As exemplified, air travelling through the air flow path travels generally upwardly though up flow duct  224 , into the cleaning wand  222 , follows the curvature of the hose and then heads generally downwardly toward the air inlet of the air treatment member assembly. The embodiment of  FIGS. 49-52  has an analogous configuration with the cleaning wand  222  in an alternative configuration, and the embodiment of  FIGS. 42-48  illustrates an example of a cleaning unit  130  that has an internal up flow duct  224 , without a rigid wand forming part of the illustrated air flow path. 
     It will be appreciated that the portion of the air flow path that is coextensive with the cleaning unit may be part of the cleaning unit, the support structure, separate components or a combination of two or more of these options. In any such case, this portion of the air flow conduit may be positioned to help reduce the overall size of the cleaning unit  130 , and preferably to help reduce the maximum depth  201  of the cleaning unit  130 . For example, the air flow conduits, such as ducts  224 , wands  222  and hoses  113 , may be nested in recesses provided recessing portions of the front and/or rear sides of the cleaning unit or on the lateral sides of the cleaning unit. 
     Referring to  FIG. 18 , in this embodiment when the cleaning wand  222  is mounted in a floor cleaning position, it is positioned behind a portion of the air treatment member assembly  110  (a lateral side portion of the dirt collection chamber as described herein), and also partially overlaps a portion of the air treatment member (e.g., the cyclone chamber  188 ) in the forward/rearward direction (e.g., it is positioned laterally outwardly of the air treatment member). Specifically, in this embodiment, both a central laterally extending plane  232  and a forward most laterally extending plane  234  of the wand  222  intersect a portion of the air treatment member, as well as the connecting web  215 , but are spaced rearwardly from the struts  214  and dirt collection chamber  190 . In this configuration, the depth  201  of the cleaning unit  130  is less than the sum of the diameter  228  of the cleaning wand and the maximum depth  230  of the air treatment member assembly  110 . By reducing the depth of the dirt collection region  116 , the wand may be positioned forward of the position shown in  FIG. 18 , in which case, the maximum depth of this portion of the upright section may be further reduced. The volume of the dirt collection region  116  may be increased by increasing the lateral length of the dirt collection region. The embodiments of  FIGS. 42-48 and 49-52  have analogous configurations, in which portions of the upflow ducts  224  are nested behind portions of the air treatment member assemblies  110 . 
     Accordingly, it will be appreciated that the cleaning unit  130  and the upright section  102  may be configured to have a relatively small depth  201  in the forward/backward direction. Configuring the upright section  102  to have a small depth may help facilitate positioning the cleaning unit  130  in relatively narrow spaces, such as beneath a couch, bed frame, coffee table and the like. Reducing the size of the cleaning unit  130  and/or upright section  102  may also help reduce the amount of space required to store the apparatus  100  when not in use. 
     Referring to  FIG. 4 , in the illustrated embodiment the cleaning unit  130  is the largest portion of the upright section, and has a depth  201  in the forward/backward direction that is relatively narrow, and is less than the depth  236  of the surface cleaning head  104  taken in the same direction (exclusive of the wheels  158 ). The depth  201  can be any suitable distance, and may be less than about 8 inches, less than about 6 inches or less than about 4 inches. For example, the depth  201  may be sized to be essentially the same as or less than the height of surface cleaning head  104 . In such a case, the extent to which apparatus  100  may extend under furniture is not limited by the depth of the cleaning unit. 
     It will be appreciated that the cleaning unit  130  may be configured so that it is wider than it is deep, such that the width  238  of the cleaning unit  130  in the lateral direction (see also  FIG. 3 ) is greater than the depth  201  of the cleaning unit  130 . Optionally, the lateral width  238  may be more than 125%, more than 150%, more than about 175%, more than about 200%, more than about 250% and/or more than about 300% of the of the depth  201  in the forward/rearward direction. Preferably, the width  238  is at least about two times as large as the depth  201 . This may help reduce the depth of the cleaning unit  130 , while still allowing sufficient volume within the cleaning unit  130  to contain the air treatment member assembly  110  and suction motor  112 . 
     It will be appreciated that the air treatment member assembly  110  may have a width  252  in a lateral direction ( FIG. 25 ) that is, in the embodiment illustrated, generally equal to the overall width  238  of the upright section  102  in the lateral direction. The air treatment member assembly  110  also has a maximum depth  256  ( FIG. 22 ) that is measured between the forward most and rearward most portions of the air treatment member assembly  110  in the forward/rearward direction. The maximum depth  256  may be about the same depth as the cleaning unit if the rear side of the dirt collections regions is recessed sufficiently to receive, e.g., struts  214 , the rigid wand and the hose. Alternately, if these components extend rearwardly of the rear face of the dirt collection regions, then the maximum depth  256  of the air treatment member assembly may be less than the depth  201  of the cleaning unit  130 , and optionally may be at least 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90% and/or at least about 95% of the depth  201 . 
     Accordingly, when operated in the low profile floor cleaning mode ( FIG. 12 ), with the upright section  102  pivoted so that the front plane  198  of the cleaning unit  130  is substantially horizontal (i.e. substantially parallel to the floor), the height  240  from the floor to the front plane  198  may be between about 100% and about 130% of the cleaning unit depth  201 , and may be between about 105% and 120% of the depth  201 . In some embodiments, the height  240  may be less than 5 inches. Preferably, the height  240  can be less than about 4.5 inches, less than about 4 inches, less than about 3.5 inches or less than about 3 inches. 
     Air Treatment Member Assembly 
     The following is a description of air treatment member assemblies that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the air treatment member assemblies described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the air treatment member assembly may be removable from the cleaning unit for emptying. The air treatment member assembly includes an air treatment member and one or more dirt collection regions. The air treatment member assembly may be removable as a sealed unit other than air inlet and outlet ports. Upper and/or lower ends of the air treatment member assembly may be openable to empty the air treatment member and the dirt collection region(s). 
     Referring to  FIGS. 5, 13, 22-24, 32, 38-41, 49, 53, and 77-85  in the illustrated embodiments the air treatment member assembly  110  has a front face  242  that is generally flat and forms a portion of the front of the cleaning unit  130 . The air treatment member assembly  110  also has an upper end  244  ( FIGS. 10, 83 ) that is proximate the upper end  132  of the cleaning unit  130  or may be the upper end of the cleaning unit, a rear side  246  ( FIGS. 22-24 ), opposed lateral sides  248  and a lower end  250  (see also  FIGS. 11 and 83 ) that seats on the lower housing  192 . 
     In the embodiments illustrated herein, the cleaning unit  130  air treatment member assembly is removably mounted to an upper end of the suction motor housing portion  118  of the cleaning unit  130 . In this embodiment, the upper end of the suction motor housing  118  may bound part or all of the axially extending walls of the pre-motor filter chamber  194 , and the pre-motor filter chamber  194  may have a generally open upper face. When the air treatment member assembly  110  is seated on the upper end of the motor housing  118 , the air treatment member assembly  110  may seal the open, upper face of the pre-motor filter chamber  194 . In this arrangement, the lower end  250  of the air treatment member assembly  110  may form the upper wall of the pre-motor filter chamber  194 . When the air treatment member assembly  110  is removed ( FIG. 25 ), the upper end of the pre-motor filter chamber  194  is opened and the pre-motor filter  120  is visible and may be removed through the open upper end for cleaning. When configured as illustrated, removing the air treatment member assembly  110  reveals the upstream/dirty side of the pre-motor filter  120 . Positioning the pre-motor filter  120  in this manner may lead users to visually inspect the pre-motor filter  120  each time the air treatment member assembly  110  is removed and/or replaced on the cleaning unit  130 . Alternatively, instead of using the air treatment member assembly  110  to seal the pre-motor filter chamber  194  or other portions of the motor housing  118 , the cleaning unit  130  may include a separate cover or seal plate to enclose the motor housing and/or pre-motor filter chamber. 
     Optionally, the pre-motor filter chamber  194 , and pre-motor filter  120  therein, may be removable from the cleaning unit  130  with the air treatment member assembly  110  (as shown in  FIGS. 78-80 ). This may allow a user to simultaneously carry all of the soiled portions of the surface cleaning apparatus  100  to the garbage can or other location for emptying/cleaning. In this configuration, the air treatment member assembly  110  and the pre-motor filter chamber  194  may be removably seated on the upper end of the motor housing  118 . A removable pre-motor filter chamber  194  of this nature may be used in combination with any of the air treatment member assemblies  110  described herein, and similarly the air treatment member assembly of  FIGS. 77-85  may be useable with a non-removable pre-motor filter chamber  194 . 
     Optionally, the upper end  244  and/or the lower end  250  of the air treatment member assembly  110  may be openable to provide access to the interior of the air treatment member assembly  110 . Referring to  FIG. 10 , in the illustrated embodiment the lower end  250  of the air treatment member assembly  110  includes an openable lower door  260 , and referring to  FIG. 11 , the upper end  244  of the air treatment member assembly  110  includes an openable upper door  262 . As illustrated, the upper and lower doors  260 ,  262  may be openable independently of each other. This may allow a user to open one end of the air treatment member assembly  110  without having to open the other. For example, a user may open the upper door  262  to inspect the interior of the air treatment member assembly  110 , while keeping the lower door  260  closed to prevent spilling of the dirt and debris collected therein. 
     Optionally, the upper and lower doors  260 ,  262  may be opened by detaching the doors  260 ,  262  from the rest of the air treatment member assembly (as shown in the embodiment of  FIGS. 77-85 ), or alternatively, as illustrated in  FIGS. 10 and 11 , the doors  260 ,  262  may be moveably mounted (e.g., pivotally connected) to a sidewall of the air treatment member assembly  110 . 
     If configured to pivot, the doors  260 ,  262  may be connected using any suitable rotatable connection, such as a pivot joint and/or hinge. Referring to  FIGS. 10-11, 19, 22 and 23  for example, in the illustrated embodiments, both the upper door  262  and lower door  260  are pivotally connected to the sidewall using hinges  264  that facilitate pivoting about respective pivot axes  266 . In this embodiment, the hinges  264  are provided on one of the lateral sides of the air treatment member assembly  110 , and oriented so that the pivot axes  266  are generally parallel to the longitudinal axis  144  (i.e. extend in the forward/rearward direction). The opposing sides of the upper and lower doors  260 ,  262  are secured in the closed position using respective latches  268 . Like the hinges  264 , the latches  268  in the illustrated embodiments are located on the opposing lateral side of the air treatment member assembly  110 , rather than on the front  242  or rear sides  246 . Positioning the hinges  264  and/or latches  268  on the lateral sides of the air treatment member assembly  110  may help reduce the depth  256  of the air treatment member assembly  110  in the forward/rearward direction. This may help reduce the overall depth  201  of the cleaning unit  130  and/or the upper section  102 . This arrangement may also leave the hinges  264  and latches  268  visible and/or accessible when the air treatment member assembly  110  is mounted to the rest of the cleaning unit  130 . 
     The air treatment member assembly  110  may be formed from any suitable material, including plastic and composite materials. Preferably, at least a portion of the air treatment member assembly is formed from transparent materials so that a user can view the interior of the air treatment member assembly without having to open the upper or lower doors  260 ,  262 . 
     Carry Handle 
     The following is a description of carry handles that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the carry handles described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the carry handle  258  is oriented so as to provide a grip area having sufficient length to enable a user to carry the air treatment member assembly  110 , the cleaning unit  130  or the entire apparatus  100  while not increasing the depth of the air treatment member assembly  110  or the cleaning unit  130 . For example, the cleaning unit may have a maximum depth of, e.g., less than 5 inches and possibly 4 inches or less. The carry handle may have a length of 5-8 inches, 5-7 inches or 5-6 inches so as to provide a grip length of, e.g., 4-5 inches. Accordingly, by orienting the carry handle to extend laterally (transverse to the central axis of the surface cleaning head), the user may comfortably carry the air treatment member assembly  110  without the need to increase the maximum depth of the air treatment member assembly. 
     As discussed previously, preferably, the air treatment member assembly  110  is removable from the upright section  102  for emptying (as exemplified in  FIGS. 10, 11 and 25 ). Accordingly, the air treatment member assembly  110  may include one or more carry handles  258  to help facilitate carrying the air treatment member assembly  110  to a garbage can or the like. 
     The carry handle  258  may have any suitable configuration, and in the illustrated embodiments includes a grip portion  270  that extends along a grip axis  272  and has a grip length  274  ( FIGS. 10, 11 and 25 ). In the illustrated embodiments, the grip axis  272  extends in the lateral direction, and is orthogonal to the longitudinal axis  144 . It will be appreciated that the grip axis  272  may extend generally in the lateral direction. 
     Optionally, the grip length  274  can be selected so that it is equal to or greater than the depth  201  of the cleaning unit  130 , and optionally may be greater than twice the depth  201  in the direction of the central longitudinal axis  144  of the air treatment member assembly  110  or of the cleaning unit  130  or of the portion of the upright section on which the cleaning unit is provided. In this arrangement, the grip portion  270  may be sized to be comfortable for the user, without being limited by the depth  201  of the cleaning unit  130 , or the depth  256  of the air treatment member assembly  110 , as may be the circumstance if the grip axis  272  extended in the forward/rearward direction. 
     For example, the grip length  274  may be selected to be between about 3 inches and about 10 inches, or more, without changing the depth  201  of the cleaning unit  130  or depth  256  of the air treatment member assembly  110 . Optionally, the grip length  274  can be selected so that it is between about 60% and about 150% of the depth  201  of the cleaning unit  130 . For example, for a cleaning unit  130  having a depth  201  of about 6 inches, the grip length  274  may be about 4 inches (about 60%), or about 6 inches (about 100% of the depth), e.g., in the range of 4-5 inches. If the cleaning unit depth  201  is about 4 inches, the a grip length  274  of 4 inches would be about 100% of the depth, and a grip length  274  of 6 inches would be about 150% of the depth. Providing a grip  270  with a grip length  274  that is equal to or greater than the depth  201  of the cleaning unit  130  may help provide a relatively large, comfortable grip portion  270  on a relatively thin upright section  102 . 
     In the embodiments, the carry handle  258  is positioned close to the front side of the air treatment member assembly  110  and is proximate the front face  242  of the air treatment member assembly  110  and the front plane  198  of the cleaning unit  130 , i.e. the grip axis  272  is closer to the front plane  198  than the rear plane  200 . In this position, the carry handle, and the grip portion, are positioned above and overlie the upper end  244  of the air treatment member assembly  110 , and in particular overlie portions of the cyclone chamber  188  and the dirt collection chamber  190 . While illustrated as being at the upper end  244  of the air treatment member assembly  110 , the carry handle  258  may be provided at other locations, such as along one of the lateral sides of the air treatment member assembly  110 . 
     In the illustrated embodiments, the carry handle  258  is provided on the openable upper door  262 , and moves with the upper door  262  when it is opened ( FIG. 11 ). Alternatively, the carry handle  258  may be connected to a different part of the air treatment member assembly  110 , and need not move with an openable door. 
     In a further alternate embodiment, the carry handle  258  may be placed on the support structure  212  (such as cross-member  216 ) provided that the handle  124  and its connection to the cleaning unit  130  and/or the support structure  212  (e.g., pivot joint  386 ) does not interfere with placing carry handle at that location. 
     Cyclone (Air Treatment Member) Configuration 
     The following is a description of cyclone configurations that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the cyclone configurations described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the air treatment member is configured to reduce the overall depth of the air treatment member assembly. Accordingly, the dirt collection region or regions are positioned external to the air treatment member. By positioning the dirt collection region or regions external to the air treatment member, a portion of a dirt collection region need not be positioned in front or behind the air treatment member (see for example  FIG. 22 ), thereby reducing the depth of the air treatment member assembly. Accordingly, the maximum depth of the air treatment member assembly  110  may be the depth of the air treatment member. Further, the shape of the dirt collection region or regions may be varied so as to fit within a desired footprint of the cleaning unit. 
     It will be appreciated that the air treatment member may be provided in the form of any suitable cyclone(s), swirl chamber or the like which are known in the surface cleaning art. In the illustrated embodiments (see  FIGS. 7, 22-24, 31-41, 52 and 77-85 ), the air treatment member is provided in the form that includes at least one cyclone chamber  188  that extends along a cyclone axis  276 , which may also define a cyclone bin assembly axis. The cyclone chamber may be of any design known in the art. Optionally, the air treatment member assembly  110  may include more than one air treatment member. For example, the air treatment member assembly  110  may include two or more cyclonic cleaning stages (each containing one or more cyclone chambers), arranged in parallel or in series with each other. One example of such an air treatment member assembly  110  is illustrated in  FIGS. 77-85 , and includes a first cyclone chamber  188 , and a second cyclone chamber  188   a  that is positioned downstream from the cyclone chamber  188  and functions as a secondary cyclonic cleaning stage. Alternatively, the cyclones  188  and  188   a  may be connected in parallel with each other. The second cyclone chamber  188   a  and second dirt collection chamber  190   a  may include analogous features to the cyclone chambers  188  and dirt collection chambers  190  described herein, and like features are indicated using like reference numerals with an “a” suffix. 
     A variety of air treatment member assemblies are described herein, having different arrangements and configurations of the cyclone chambers and dirt collection chambers. Any of these air treatment member configurations may be used in combination with any of the other, compatible features described herein. 
     As exemplified, the cyclone chamber  188  includes a first end wall  278 , a second end wall  280  axially spaced apart from the first end wall and a generally cylindrical sidewall  282  extending between the first and second end walls  278 ,  280 . Optionally, some or all of the cyclone walls may coincide with portions of the dirt collection chamber walls, and/or may form portions of the outer surface of the cleaning unit  130  and upright section  102 . Alternatively, in some examples some or all of the cyclone walls can be distinct from other portions of the cleaning unit  130 , and may not overlap or be co-incident with other walls in the air treatment member assembly  110 . Referring to the embodiment of  FIGS. 77 and 82 , the sidewall  282  of the first cyclone chamber  188  is coincident with portions of the dirt collection chamber sidewalls (at the front and rear sides of the air treatment member assembly  110 ), whereas, as exemplified, the diameter of second cyclone chamber  188   a  may be slightly smaller, and may be positioned such that the sidewall  282   a  is distinct from the dirt collection chamber sidewalls. In this example, there is an optional overlap between the cyclone chamber sidewalls, such that a portion of sidewall  282  is coincident with a portion of sidewall  282   a . This may help reduce the combined lateral width of the cyclones  188  and  188   a , and in some instances may help provide structural support/strength for the sidewalls  282  and  282   a.    
     Referring to  FIG. 22  as an example, in these embodiments the cyclone chamber  188  has a cyclone air inlet  284 , through which dirty air can enter the cyclone chamber  188 , and a cyclone air outlet  286 , through which treated air can exit the cyclone chamber  188 . While some dirt may settle/collect on the interior surface of the second end wall  280 , the cyclone chamber  188  may also include at least one dirt outlet  288  through which dirt and debris can exit the cyclone chamber  188 , and preferably collect in an external dirt collection chamber  190 . If a second cyclone chamber  188   a  is included ( FIGS. 77-85 ) it may include an analogous air inlet  184   a , and optionally, may include two or more air inlets  184   a . As exemplified in  FIG. 83 , in this embodiment the second cyclone  188   a  includes four air inlets  284   a , and other embodiments may have different numbers of air inlets. In this embodiment, all four air inlets  184   a  are in air flow communication with a common air plenum  285  ( FIGS. 78, 83 and 84 ) that is downstream from the air outlet  286  of the first cyclone chamber  188 . That is, air exiting the first cyclone  188 , via the air outlet  286 , flows into the air plenum  285  and is then distributed amongst the four air inlets  184   a . After flowing in via the inlets  184   a , the air circulates within the second cyclone chamber  188   a  and exits via the air outlet  286   a  and travels into the pre-motor filter chamber  194 . In this arrangement, the air plenum  285  extends beneath at least a portion of the second dirt chamber  190   a , and laterally surrounds a lower end of the cyclone chamber  188   a . The second cyclone chamber  188   a  includes dirt outlets  288   a  (two in the illustrated example) which are in communication with a corresponding second dirt collection chamber  190   a . In the illustrated example, the second dirt chamber  190   a  is fluidly isolated from the dirt chamber  190 , which may help maintain a desired air flow path through the air treatment member assembly  110 . 
     The dirt outlet  288  (or  288   a ) may have any suitable configuration and be provided at any location in the cyclone chamber  188  (or  188   a ). For example, if a dirt collection region is provided below or above a cyclone chamber that has a longitudinal axis that extends vertically when the upright section is in the upright storage position of  FIG. 1 , then the overall height of the cleaning unit may be too large. Accordingly, if the cyclone chamber has a longitudinal axis that extends vertically when the upright section is in the upright storage position, it is preferred to position the dirt collection region or regions exterior to the cyclone chamber  188  and to extend in the same direction as the cyclone chamber  188 . Accordingly, the dirt outlet or outlets  288  may be configured so that dirt travelling through the dirt outlet  288  travels in a generally lateral/radial outward direction and then falls downwardly into the dirt collection chamber  190 . 
     Optionally each cyclone chamber may be configured to include one dirt outlet, or more than one dirt outlet. For example, a dirt outlet  288  may be provided for each dirt collection chamber  190 . Referring to  FIGS. 22 and 23 , in the illustrated embodiment, the cyclone assembly includes two dirt collection chambers  190 , each of which is spaced laterally from the cyclone chamber. Accordingly, the cyclone chamber  188  includes two, spaced apart dirt outlets  288  that are provided on opposing lateral sides of the cyclone chamber  188 . Each dirt outlet  288  may be configured as a slot that extends around a portion of the cyclone chamber sidewall  282 , and may be partially bounded by the first end wall  278  of the cyclone chamber  188 . 
     As exemplified, the dirt outlets  288  may be provided toward the upper end of the cyclone chamber  188 , and at the upper end  244  of the air treatment member assembly  110  itself. In contrast, both the air inlet  284  and air outlet  286  may be provided toward the opposed, lower end  280  of the cyclone chamber  188 , which corresponds to about the vertical mid-point of the air treatment member assembly  110 . A cyclone with this orientation may be referred to as an inverted cyclone. 
     In this embodiment, and in the embodiments of  FIGS. 31-33 and 38-40 , air exiting the cyclone chamber  188  travels downwardly, and, as exemplified, may travel through a portion of the dirt collection chamber  190  if a dirt collection region is positioned below the cyclone chamber  188 , via an exit conduit  290  ( FIG. 23 ), to an aperture  292  ( FIGS. 7 and 10 ) provided in the lower door  260  of the air treatment member assembly  110 . The exit conduit  290  in these embodiments is at least partially surrounded by the dirt collection chamber  190 , and as illustrated is entirely laterally surrounded (whereas it is only partially surrounded in the embodiments of  FIGS. 35 and 36 ). Positioning the exit conduit  290  at least partially within, and extending through, the dirt collection chamber  190  may help reduce the overall size of the air treatment member assembly  110  while increasing the volume for dirt collection, for example as compared to placing the exit conduit outside of the dirt collection chamber. 
     In other embodiments, such as shown in  FIGS. 78 and 84 , the lower end of the cyclone chamber  188   a  is positioned adjacent the openable bottom door  260 , such that the dirt collection chambers  190  and  190   a  do not extend beneath the cyclone chamber  188   a . In this arrangement, instead of using a separate exit conduit, the air outlet  286   a  of the cyclone chamber  188   a  includes the aperture  292  in the door  260 . In addition to the aperture  292  being movable with the lower door  260 , in this example an upwardly extending conduit  293   a  that forms part of the air outlet  286   a  is also movable with the door  260  (see  FIG. 84 ). In this embodiment, opening the lower door  260  provides access to the interior of the cyclone chamber  188   a  and removes the conduit  293   a  from within the cyclone chamber  188   a . The cyclone chamber  188  includes a similar conduit  293  (also referred to as a vortex finder—and similar conduits are included in the other embodiments described herein), but the conduit  293  is not moveable when the door  260  is opened. In the illustrated embodiment, opening the door  260  also opens the lower sides of each of the air inlets  284   a  (see also  FIG. 83 ), which may be useful for cleaning or inspection of the air inlets  284   a.    
     When the air treatment member assembly  110  is mounted to the upright section, the aperture  292  is in fluid communication with the pre-motor filter chamber  194 . This arrangement can also help simplify the air flow path, as the air exiting the cyclone chamber  188  may travel linearly along the direction of the cyclone axis  276  directly into the pre-motor filter chamber  194  and, in the illustrated embodiments, to the suction motor  112  that is positioned beneath the air treatment member assembly  110 . Reducing the number of turns/corners along this portion of the air flow path may help reduce the back pressure in the air flow path. It will be appreciated that, in some embodiments, the suction motor inlet need not be aligned with, or extend in the same direction as, the cyclone chamber air outlet. 
     Alternatively, the cyclone chamber  188  may be configured as an inverted cyclone but may only include a single dirt outlet  288 , which in the embodiment of  FIG. 38  is provided at the front of the cyclone chamber  188 . It will be appreciated that the overall depth  256  of the cyclone assembly is reduced in this embodiment since the dirt collection chamber  190  is not positioned rearward of the rearward extent of the cyclone chamber  188  and is configured to have a lateral length that is greater than its depth. It will also be appreciated that a single dirt outlet  288  need not be positioned directly at the front of the cyclone chamber, but instead may be offset toward one lateral side of the cyclone chamber, such as shown in the embodiments of  FIGS. 31-33, 39, 40 and 77 , or toward the bottom of the cyclone, such as shown in the embodiments of  FIGS. 35-37 . 
     Optionally, the cyclone chamber  188  may oriented in a generally upright configuration (i.e. the cyclone axis  276  (or axis  276   a ) is generally parallel to the handle axis  134  when the apparatus is in the upright position), but may alternatively be arranged so that the air outlet  286  is provided toward the top of the cyclone chamber  188 , instead of the bottom. For example, in the embodiment of  FIG. 41 , the cyclone chamber  188  is arranged so that the air inlet  284  and the air outlet  286  are at the top of the air treatment member assembly  110 , and the dirt outlet  288  is at the bottom. To connect this air treatment member assembly  110  to the air flow path, and aperture  292  may be provided in the upper door  262  of the air treatment member assembly  110  (not shown in this figure) and may be connected to suitable air flow conduits that may be external the dirt collection chamber  190  (for example conduits provided on or in the cleaning unit  130 ) to direct the air exiting the cyclone chamber  188  to suction motor  112 . Configuring the air treatment member assembly  110  in this manner may, in some embodiments, increase the complexity of the air flow path between the cyclone chamber  188  and the suction motor  112  (for example as compared to the embodiment of  FIGS. 22 and 23 ), but may help increase the capacity of the dirt collection chamber  190  by removing the need for the internal exit conduit  290 . This may also help simplify the construction and/or operation of the lower door  260  of the air treatment member assembly  110 , as it need not include an air exit aperture  292  and the associated gaskets and/or seals. 
     Alternatively, instead of arranging the cyclone chamber  188  in a generally upright configuration (in which the cyclone axis  276  is substantially parallel to the handle axis  134  in the upright position), the cyclone chamber  188  may be oriented in a lateral/sideways configuration in which the cyclone axis  276  is generally horizontal when the apparatus  100  is in the storage position, and optionally the cyclone axis  276  may be substantially orthogonal to the handle axis  137  when in the upright position. In the horizontal orientation, the cyclone chamber  188  may be oriented so that the cyclone axis  276  extends substantially laterally, i.e. substantially orthogonal to the longitudinal axis  144  ( FIGS. 35 and 36 ), substantially longitudinally, i.e. substantially parallel to the longitudinal axis  144  ( FIG. 37 ), or at any non-zero angle therebetween. 
     In the embodiment of  FIG. 35 , the cyclone chamber  188  is configured as a uniflow cyclone, where the cyclone air inlet  284  is at one end of the cyclone chamber  188  (toward the right as illustrated) and the air outlet  286  is at the opposed end of the cyclone chamber  188  (toward the left as illustrated), along with the dirt outlet  288 . In this configuration, the air exit conduit  290  may extend generally vertically along one side of the air treatment member assembly  110 , to an exit aperture  292  in the lower door  260 . The air exit conduit  290  in this embodiment is only partially surrounded by the dirt collection chamber  190 , and a portion of the exit conduit  290  forms part of the outer surface of the air treatment member assembly  110 . 
     To supply air to the cyclone chamber  188 , this embodiment includes an air inlet conduit  294  which, in the example illustrated is analogous to the air exit conduit  290  and, may extend from an inlet aperture  296  in the lower door  260  to the air inlet  284  in the cyclone chamber  188 . In this arrangement, air travels generally upwardly into the cyclone chamber  188 , rotates within the chamber, and travels downwardly from the cyclone chamber  188  to the rest of the air flow path. In the illustrated embodiment, much (and optionally all) of the dirt collection chamber  190  is located laterally between the air inlet  294  and exit conduits  290 , and below the cyclone chamber  188 . 
     Alternatively, instead of having a uniflow configuration, a laterally oriented cyclone may be configured with the air inlet and air outlet located toward the same end of the cyclone chamber. To provide air flow connections, the air treatment member assembly includes air inlet conduit  294  and air exit conduit  290  that may extend generally parallel to each other and may be located on toward the same side of the air treatment member assembly  110 . As exemplified in  FIG. 36 , in this embodiment the dirt outlet  288  may be provided at the opposite end of the cyclone chamber  188  (to the left as illustrated). In these embodiments, the air inlet  294  and exit conduits  290  may be circular ducts, or may have any other suitable cross-sectional shape, including generally in the shape of a parallelogram (e.g., square or rectangular) and the like. Optionally, the inlet and exit conduits  294 ,  290  may have substantially the same cross-sectional flow area, so that the flow area at the cyclone air inlet  284  is generally equal to the flow area at the outlet  286  (this may be the case in any air treatment member assembly described herein). This may help reduce back pressure. 
     In the embodiment of  FIG. 37 , the cyclone chamber  188  is oriented so that the cyclone axis  276  is horizontal and is substantially parallel to the central longitudinal axis  144  of the apparatus  100 , such that the cyclone axis  276  extends in the forward/rearward direction. In this arrangement, air is supplied to the cyclone chamber  188  via the inlet conduit  294 , and removed via an outlet conduit that extends to the rear side of the air treatment member assembly (not shown in this figure). In this arrangement, changing the axial length of the cyclone chamber  188  can impact the overall depth  256  of the air treatment member assembly  110 , whereas in the embodiments of  FIGS. 35 and 36  the cyclone length is less relevant to the air treatment member assembly depth  256  than the cyclone diameter. 
     In the illustrated embodiments, the cyclone chambers  188  are generally cylindrical, and have a cyclone diameter  298  ( FIG. 22 ). The cyclone diameter may be any suitable size, and may be, for example, between about 1 inch and about 6 inches or more, and preferably may be between about 2 inches and about 4 inches. The second cyclone chamber  188   a  has a diameter  298   a  ( FIG. 82 ) which may be any suitable size, and in the illustrated example is less than the diameter  298 . 
     In some configurations, such as shown in  FIGS. 22, 40 and 41 , the cyclone diameter  298  may constitute a majority of the depth  256  of the air treatment member assembly  110  in the forward/rearward direction. For example, in the embodiments of  FIGS. 22, 40, 45 and 82  the cyclone diameter  298  is equal to the maximum depth  256  of the air treatment member assembly  110 . In this arrangement, sidewall  282  forms portions of the front and rear sides of the air treatment member assembly  110  (while the sidewall  282   a  does not in the illustrated example). Alternatively, the cyclone chamber  188  may be sized and/or positioned such that the cyclone diameter  298  is less than the air treatment member assembly depth  256 , such as shown, for example, in the embodiments of  FIGS. 38 and 39 , and as shown for the second cyclone chamber  188   a  in  FIG. 82 . 
     Preferably, at least one portion of each cyclone chamber is openable. For example, a least a portion of the cyclone chambers  188  and  188   a  may be openable. This may help facilitate access to the cyclone chamber  188  or  188   a  for emptying, inspection, maintenance and the like. Optionally, one or both of the end walls  278 ,  280  of the cyclone chamber  188  may be openable. Referring to  FIGS. 7, 8, 22-23 , in this embodiment the upper end wall  278  of the cyclone chamber  188  is part of the openable upper door  262  of the air treatment member assembly  110 , and is opened when the door  262  is opened. In these embodiments, neither the sidewall  282  nor the lower end wall  280  of the cyclone chamber  188  are openable. A similar arrangement is used in the embodiments of  FIGS. 38-40 . In the embodiment of  FIGS. 77-85 , the upper end walls  278  and  278   a  of the cyclone chambers  188  and  188   a  are both part of the openable upper door  262 , such that opening the door  262  simultaneously opens both cyclone chambers  188  and  188   a . In this embodiment the lower end wall  280  of cyclone chamber  188  is not openable, whereas the lower end wall  280   a  of cyclone chamber  188   a  is openable with lower door  260 . Opening the door  262  also simultaneously opens dirt collection chambers  190  and  190   a , whereas opening the lower door  260  opens dirt collection chamber  190  but does not open the lower end of dirt collection chamber  190   a.    
     Alternatively, the end walls  278 ,  280  of the cyclone chamber  188  may be fixed, and a portion of the sidewall  282  may be openable. Examples of this configuration are shown in  FIGS. 35 and 36 , in which the openable upper door  262  of the air treatment member assembly  110  includes part of the sidewall  282  of the cyclone chamber  188 . In this configuration, opening the upper door  262  can open the cyclone chamber  188 , and neither the air inlet  284  or air outlet  286  are provided in a moving, openable portion of the air treatment member assembly  110 . 
     In some embodiments, the cyclone chamber  188  need not be openable, as is shown in the embodiment of  FIG. 41  where both the upper and lower end walls  278 ,  280  are fixed. However, this configuration may be modified to be openable, for example by making the upper end wall  278  openable. 
     It will be appreciated that, in some embodiments, the air treatment member may comprise two or more cyclone or other air treatment members in parallel with each other, rather than in series as illustrated with cyclone chambers  188  and  188   a . Each cyclone chamber may include any suitable number of air inlets, air outlets and dirt outlets. For example, a cyclone may include four air inlets, one air outlet and two dirt outlets, or one air inlet, one air outlet and two dirt outlets, and the like. 
     Dirt Collection Chamber 
     The following is a description of dirt collection chambers that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the dirt collection chambers described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, some and preferably all of the dirt collection chamber or chambers are positioned external to the cyclone chamber. By positioning the dirt collection chamber or chambers exterior to the air treatment member, the dirt collection chamber or chambers may be positioned in a portion of the footprint of the cleaning unit  130  in which the air treatment member is not located. In this way, the dirt collection region or regions may be located and sized so as to not increase the depth of the cleaning unit, or to limit the extent to which the depth of the cleaning unit is increased. Accordingly, if the air treatment member has a longitudinal axis that extends vertically when the upright section is in the storage position, then the dirt collection region or regions may be laterally spaced from the air treatment member and if the air treatment member has a longitudinal axis that extends horizontally when the upright section is in the storage position, then the dirt collection region or regions may be spaced above or below the air treatment member. 
     The air treatment member assemblies  110  used in combination with the apparatuses  100  described herein can include any suitable type and/or configuration of dirt collection chamber  190  and/or dirt collection chamber  190   a  to receive and retain dirt and debris separated from the dirty air flowing through the air treatment member, for example the cyclone chambers  188 / 188   a . Optionally, the dirt collection chambers  190 / 190   a  can at least partially, laterally surround the cyclone chambers  188 / 188   a . For example portions of the dirt collection chamber  190  can be positioned forward of the cyclone chamber  188 , rearward of the cyclone chamber  188 , to the left or right sides of the cyclone chamber  188 , or any suitable combination thereof. Dirt chamber  190   a  and cyclone chamber  188   a  may have an analogous configuration. In addition, portions of the dirt collection chambers  190 / 190   a  can extend below and beneath the cyclone chamber (or optionally above and overlie), such that the cyclone chamber  188 / 188   a  overlies (or underlies) some or all of the dirt collection chamber  190 / 190   a . Configuring the cyclone chamber  188  and the dirt collection chamber  190  in this manner, at least partially, may help reduce the overall size of the air treatment member assembly  110 . 
     Optionally, the dirt collection chamber  190  may be configured so that the dirt collection chamber  190  is only positioned laterally beside the cyclone chamber  188 , and that the dirt collection chamber  190  does not extend completely in front of or behind the cyclone chamber  188 . Optionally, the dirt collection chamber  190  may be configured so that the maximum depth  300  ( FIGS. 21 and 23 ) of the dirt collection chamber  190  is equal to or less than the maximum depth of the cyclone chamber  188  (e.g. its diameter  298  as shown in  FIG. 22 , or its axial length as shown in  FIG. 37 ). In some configurations, the dirt collection chamber  190  may not have a uniform depth, and some portions of the dirt collection chamber  190  may be relatively shallower than others in the forward/rearward direction. In accordance with such embodiments some or all of the portions of the support structure  212  (e.g., struts  214 ) may be positioned at these shallower locations so as to be recessed inwardly from the outer lateral extent of the cyclone chamber (see e.g.,  FIGS. 18 and 19 ). 
     Referring to  FIGS. 7, 8, and 22-24 , in one embodiment the dirt collection chambers  190  have an upper region  302  that is provided adjacent each lateral side of the cyclone chamber  188 , and a lower region  304  that is below the lower end wall  280  of the cyclone chamber  188 , so as to underlie the cyclone chamber  188  in this embodiment. In this example, the cyclone chamber sidewall  282  contacts the front wall of the air treatment member assembly  110 , and subdivides the upper region  302  into left and right portions, that are laterally separated by the cyclone chamber  188 . Each of the left and right portions is in communication with a respective one of the dirt outlets  288  of the cyclone chamber  188 . Optionally, the left and right portions could be sealed such that they function as separate first and second dirt collection chambers  190 , each on different lateral sides of the cyclone chamber  188 . Alternatively, as shown in this embodiment, both the left and right portions can be in communication with the lower region  304 , such that dirt exiting via either dirt outlet  288  can eventually be collected in the common lower region  304  (at least until the dirt level reaches the lower end  280  of the cyclone chamber  188 , at which point the left and right portions may be temporarily isolated from each other). In this embodiment, the strut portions  214  of the support structure  212  of the cleaning unit  130  are positioned behind a respective dirt collection chamber  190 . Optionally, the lower region  304  may also be configured to laterally surround another portion of the apparatus  100 , such as the pre-motor filter  120  as shown in the embodiment of  FIG. 52 . 
     Optionally, instead of extending between the front and rear walls of the air treatment member assembly  110 , the cyclone chamber  188  may be sized and/or positioned so that the dirt collection chamber  190  is at least partially in front or behind the cyclone chamber  188 . Accordingly, the cyclone chamber will not extend all the way to the front or rear wall of the air treatment member assembly  110 . This may help reduce the overall size of the air treatment member assembly  110 , while providing a dirt collection chamber  190  with a desired internal volume. For example, in the embodiment of  FIG. 39 , the cyclone chamber  188  is partially nested within the dirt collection chamber  190 , and the dirt collection chamber  190  partially laterally surrounds the cyclone chamber  188 , but the front of the cyclone chamber  188  is offset from the front wall of the dirt collection chamber by an offset distance  306 . In this embodiment, the total depth  256  of the air treatment member assembly  110  is greater than the cyclone diameter  298 , and may be about equal to the sum of the cyclone diameter  298  and the offset distance  306 . Optionally, in this embodiment the dirt collection chamber  190  may extend beneath the lower end of the cyclone chamber  188 . In the embodiment of  FIG. 82 , the dirt collection chamber  190   a  is positioned both in front of and behind the cyclone chamber  188   a . In this arrangement, the overall depth of the cyclone chamber  188   a  and the dirt chambers  190   a  is equal to the diameter  298  of the cyclone chamber  188 , and therefore this arrangement does not require that the depth  256  of the air treatment member assembly  110  be larger than the diameter  298 . Portions of the dirt collection chamber  190   a  are located on one side of the cyclone chamber  188  (to the right as illustrated in  FIG. 82 ), while the dirt collection chamber  190  is positioned on the opposite side (the left as illustrated) of cyclone chamber  188 . In this arrangement, the cyclone chamber  188  separates the dirt collection chambers  190   a  and  190  from each other. 
     Optionally, instead of providing dirt collection chambers  190 , or portions thereof, on both lateral sides of the cyclone chamber  188 , the dirt collection chamber  190  may be provided on only one lateral side of the cyclone chamber  188  and optionally may extend beneath the cyclone chamber  188 . For example, in the embodiment of  FIGS. 31-33 , the cyclone chamber  188  is laterally offset toward one side of the air treatment member assembly  110 , and the upper region  302  of the dirt collection chamber  190  is located only on one side of the cyclone chamber  188 . The lower region  304  of the dirt collection chamber may extend across the width of the air treatment member assembly  110 , including a region beneath and underlying the cyclone chamber  188 . Arranging the air treatment member assembly  110  in this manner may allow for a variety of different cyclone chamber placements, which may provide flexibility in the air flow path configuration. For example, if the suction motor  112  is located toward one lateral edge of the cleaning unit  130 , positioning the cyclone chamber  188  toward the same lateral side of the cleaning unit  130  may align the air flow path components. 
     In the embodiment of  FIG. 40 , the cyclone chamber  188  is positioned on one lateral side of the air treatment member assembly  110 , while the dirt collection chamber is primarily located on the other lateral side, and a lower region  304  of the dirt collection chamber  190  may optionally underlie at least a portion of the cyclone chamber  188 . The embodiment of  FIGS. 42-48  has an analogous configuration of the air treatment member assembly  110 , and is arranged so that the suction motor  112  is also offset toward the same side as the cyclone chamber  188 . In the embodiment of  FIG. 79 , the dirt collection chamber  190  is located on one lateral side of the cyclone chamber  188 , and a lower portion  304  underlies a portion of the cyclone chamber  188 . 
     Optionally, the cyclone chamber  188  need not be nested within the dirt collection chamber in the forward/rearward direction at all, and in some embodiments may be located substantially and/or entirely forward or rearward of the dirt collection chamber  190 . Such configurations may allow the interior of dirt collection chamber  190  to be generally free from obstruction by the cyclone chamber  188 . This may also allow the cyclone chamber  188  to be nested within the support structure  212 , while the dirt collection chamber  190  remains located toward the front or rear of the cleaning unit  130 . This configuration may allow different air flow path configurations, as neither the inlet nor the exit conduits  294 ,  290  need to pass through the interior of the dirt collection chamber  190 . In the embodiment of  FIG. 38 , the cyclone chamber  188  is not nested within the dirt collection chamber  190 , and instead is offset behind the dirt collection chamber  190 . In this example, a single dirt outlet  288  is provided at the front of the cyclone chamber  188 , through which debris can travel laterally forwardly into the dirt collection chamber  190 . In this embodiment the overall depth  256  of the air treatment member assembly  110  is greater than the cyclone diameter  298 , and is generally equal to the sum of the cyclone diameter  298  and offset distance  306 . 
     Optionally, the dirt collection chamber  190  may be configured so that it does not extend underlie or extend below the bottom of the cyclone chamber  188 . Portions of the dirt collection chamber  190  may be positioned laterally beside the cyclone chamber  188 , and portions of the dirt collection chamber  190  may extend below the bottom end of the cyclone chamber  188  without extending beneath the cyclone chamber  188 . For example,  FIG. 52  illustrates one embodiment wherein the dirt collection chamber  190  extends laterally beside the cyclone chamber  188 , and lateral portions of the dirt collection chamber  190  extend downwardly below the bottom end wall  280  of the cyclone chamber  188 , but do not underlie the cyclone chamber  188 . This may allow the space beneath the cyclone chamber  188  to be used to accommodate other components of the surface cleaning apparatus including, for example, the pre-motor filter  120  and pre-motor filter chamber  194  as illustrated in this embodiment. Nesting other portions of the surface cleaning apparatus  100  with the air treatment member assembly  110  may help reduce the overall size of the cleaning unit  130  and/or the surface cleaning apparatus  100 . 
     The dirt collection chamber  190  or  190   a  may be sized to have any suitable internal volume for holding dirt. For example, the volume of the dirt collection chamber  190  may be between about 0.5 to about 2.5 liters, from about 1 to about 2 liters, or more in some applications, and may be between about 0.5 gallon and about 1 gallon. Optionally, the dirt collection chamber  190  can be configured so that at least a portion of the volume is provided laterally around the cyclone chamber  188  (such as the left and right portions in the upper region  302  of  FIG. 23 ). The portion of the volume that is laterally adjacent the cyclone chamber  188 , as opposed to being below or beneath the cyclone chamber  188  (such as the lower region  304  in  FIG. 23 ) may be between about 0% and about 100% of the total volume of the dirt collection chamber  190 , and optionally may be between about 25% and about 90%, between about 40% and about 80%, between about 50% and about 70% of the volume, and optionally may be at least 60% of the volume and/or at least 80% of the total dirt collection chamber volume in some embodiments. 
     In some embodiments, the dirt collection chamber  190  may have different depths at different locations within the dirt collection chamber. Referring to  FIGS. 21 and 23 , in this example the upper region  302  ( FIG. 23 ) of the dirt collection chamber  190  has a depth  308  ( FIG. 22 ) that is less than the cyclone diameter  298  (which also corresponds to the cyclone chamber depth in this configuration), while portions of the lower region  304  of the dirt collection chamber have a depth  300  that is greater than the depth  308  of the upper region  302 , and may be about equal to the cyclone diameter  298 . Optionally, the depth  308  can be less than the diameter  162  of the wheels  158 . This may help reduce the overall size of the air treatment member assembly  110 . The embodiments of  FIGS. 38 and 39  may have similar configurations, where the cyclone diameter  298  is greater than the depth  308  of at least the upper region  302  of the dirt collection chamber  190 . Alternatively, the air treatment member assembly  110  may be configured such that the minimum depth of the dirt collection chamber  190  is generally equal to or greater than the depth/diameter  298  of the cyclone chamber  188 . In the embodiment shown in  FIG. 40 , the depth  300  of the dirt collection chamber  190  is substantially the same as the cyclone diameter  298 , and the overall depth  256  of the air treatment member assembly  110 . Similarly, the embodiments of  FIGS. 35-37  may also be configured such that the depth of the dirt collection chamber is at least equal to the depth of the cyclone chamber. 
     Optionally, one or both ends of the dirt collection chambers  190 / 190   a  may be openable for emptying. In the embodiment of  FIGS. 10 and 11 , both ends of the dirt collection chamber  190  are openable, the upper end being opened when the upper door  262  is opened, and the lower end being opened when lower door  260  is opened. In the embodiment of  FIG. 84 , the upper and lower ends of the dirt collection chamber  190  are opened by opening doors  262  and  260  respectively, while only the upper end of the dirt collection chamber  190   a  is openable. 
     Pre-Motor Filter 
     The following is a description of pre-motor filters that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the pre-motor filters described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the pre-motor filter may be positioned so as to be visible or accessible when the air treatment member assembly is removed. Alternately or in addition, the pre-motor filter assembly may be positioned in a linear air flow path extending from the air treatment member air outlet to the suction motor air inlet. 
     Optionally, a pre-motor filter may be provided in the air flow path between the air treatment member assembly and the suction motor. The pre-motor filter may be housed in a pre-motor filter housing that may, optionally, be provided in the cleaning unit  130 . The pre-motor filter may be any suitable filter, including a physical, porous media filter (e.g., foam, felt), electrostatic filter, HEPA filter and the like. The pre-motor filter may have any suitable physical configuration and may be positioned in any suitable location that is consistent with the cleaning unit and/or air treatment member in a given embodiment of the apparatus  100 . 
     In the illustrated embodiments (see for example  FIGS. 7, 25, 30, 31, 34 and 52 ) the lower housing  192  of the cleaning unit  130  includes the pre-motor filter chamber  194 , which is positioned below and underlies at least a portion of the air treatment member assembly  110 . Optionally, the pre-motor filter chamber  194  may also be located above and overlies the suction motor  112  and motor housing  118 . Optionally, as shown in the embodiment of  FIGS. 77-85 , the pre-motor filter chamber  194  may be removable from the motor housing  118 . 
     In the embodiments of  FIGS. 7, 25, 30, 31 and 34 , the pre-motor filter  120  is a generally flat, planar type filter that includes a foam layer  310  and a felt layer  312  ( FIG. 25 ). The pre-motor filter  120  extends in a generally lateral filter plane  314  (which is horizontal as illustrated in  FIG. 7 ). The pre-motor filter  120  includes an upstream side  316  ( FIG. 25 ) through which air can enter the pre-motor filter, and that has an upstream flow area (i.e. the cross-sectional area of the pre-motor filter taken in a plane orthogonal to the direction of air flow through the pre-motor filter). The pre-motor also has an opposing downstream side  318  ( FIG. 25 ) through which air can exit the pre-motor filter  120 , and that has a downstream flow area. Optionally, the upstream and downstream flow areas may be substantially equal. 
     In these embodiments, the upstream side  318  may be in communication with an upstream header area  320  ( FIG. 31 ), defined between the upstream side  318  of the pre-motor filter  120  and the bottom of the air treatment member assembly  110 , and a downstream header area  322 , defined between the downstream side  318  and the underlying portions of the cleaning unit  130 , which include the motor housing  118  and the post-motor filter chamber  196  in this embodiment. In this embodiment, the pre-motor filter chamber  194  and the pre-motor filter  120  overlie at least a portion of the suction motor  112  and at least a portion of the post-motor filter  122  and its respective post-motor filter chamber  196 . Stacking the components in this manner may help reduce the overall size of the cleaning unit  130 . 
     The pre-motor filter  120  may be removed from the pre-motor filter chamber  194  when the air treatment member assembly is removed ( FIG. 25 ). 
     As exemplified in  FIGS. 7, 30 - and  34 , the air exit aperture  292  in the bottom end of the air treatment member assembly  110  maybe generally centered in the left/right direction, and air therefore enters the upstream header at about the centerline of cleaning unit  130 . Alternatively, as shown in  FIG. 31 , the air exit aperture  292  (along with the cyclone chamber  188  and exit conduit  290 ) may be offset to one side of the cleaning unit  130 , such that air enters the upstream header  320  toward one side of the header. In either embodiment, the header  320  is configured to allow air to travel laterally across the upstream surface  316  of the pre-motor filter  120 , before being drawn through the pre-motor filter  120 . 
     In these embodiments, the pre-motor filter chamber  194 , and pre-motor filter  120 , may extend the entire lateral width  238  of the cleaning unit  130 . This may help increase the upstream and downstream flow areas. Alternatively, the pre-motor filter chamber  194  and pre-motor filter  120  may extend across only a portion of the width  238  of the cleaning unit  130 . Optionally, the pre-motor filter chamber  194 , and pre-motor filter  120 , may be configured to extend over at least 40%, and optionally at least 50%, at least 60%, at least 70%, at least 75%, at least 80% or more of the overall depth  201  of the cleaning unit  130 . Increasing the depth of the pre-motor filter  120  may help increase its upstream flow area and reduce the frequency of cleaning or replacing the pre-motor filter. Referring to  FIG. 21 , in this embodiment, the pre-motor filter chamber, and pre-motor filter, has a depth  324  that is over about 75% of the maximum cleaning unit depth  201 . 
     Alternatively, instead of being configured as a generally planar filter, the pre-motor filter  120  may be configured as a generally cylindrical filter. In the embodiment illustrated in  FIGS. 49-52 , the pre-motor filter  120  is itself configured as a generally cylindrical foam filter with a hollow, open interior that may be sized to fit around an optional outlet conduit  326 . The foam filter extends longitudinally between upper and lower ends along a filter axis  328 , which is generally vertical in the illustrated embodiment. In this example, the pre-motor filter  120  and outlet conduit  326  are concentrically positioned, and both extend along the filter axis  328 . In this embodiment, the filter axis  328  is co-axial with the cyclone axis  276 , but alternatively the pre-motor filter  120  may be laterally offset from the cyclone chamber  188 , such that the axes  328  and  276  are not co-axial, but optionally may still be substantially parallel to each other. The filter axis  328  is also parallel to the suction motor axis  330  in this embodiment, but need not be in other embodiments. 
     As exemplified in  FIGS. 49-52 , the pre-motor filter  120  is sized so that its diameter is less than the diameter of the pre-motor filter housing side wall. In this arrangement, a generally annular flow region is defined between the side wall and the outer wall of the filter which functions as the upstream surface  316 . This annular flow region functions as the upstream header  320 . An opposed inner wall of the filter surrounds and faces the outlet conduit  326  and functions as the downstream surface  318 . In this embodiment, the interior of the conduit  326  can function as the downstream header  322 . In this embodiment, the pre-motor filter  120  has a generally annular transverse cross-sectional area, taken in a plane that is orthogonal to the filter axis  328 . 
     Referring to  FIG. 52 , in the illustrated example, the projection of the suction motor axis  330  extends through the pre-motor filter chamber  194  and through the interior of the conduit, but does not actually intersect the foam filter itself. In this configuration the air exiting the pre-motor filter  120  may be traveling in the same direction as air entering the suction motor  112 , which could help reduce back pressure. 
     In this embodiment, the pre-motor filter chamber  194  and pre-motor filter  120  underlie the cyclone chamber  188  and overlie at least a portion of the suction motor  112 , but does not extend beneath the dirt collection chamber  190  or above the post-motor filter chamber  196 . 
     Positioning of the Suction Motor 
     The following is a description of suction motors that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the suction motors described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the suction motor housing  118 , and the suction motor positioned therein, may be sized so as not to increase the depth of the cleaning unit  130  or the upright section at the location of the cleaning unit  130 . Accordingly, the diameter  335  of the suction motor housing  118  may be equal to or less than depth  201  and may be equal to or less than depth  230 . Optionally, the suction motor may be sized so that the depth  230  of the air treatment member assembly  110  is the same as the diameter of the suction motor±2 inches or ±1 inches. Optionally, as shown in  FIG. 20 , the diameter of the suction motor may be the depth of the cleaning unit from front plane  198  to rear plane  200 . 
     The suction motor  112  used in combination with the embodiments described herein may be any suitable type of suction motor, and may include a motor portion and a fan/impeller portion for moving the air. For example, the suction motor  112  may be an AC motor or a DC motor, or both. The suction motor  112  may be powered by plugging the apparatus  100  into a wall outlet (typically AC power), by using an on board power source  332  (schematically illustrated in  FIG. 30 ) such as batteries and/or capacitors—typically DC) or both. The suction motor  112  may be of any suitable power, and may be at least 300 W, 400 W, at least 500 W, at least 600 W, at least 700 W, at least 800 W, at least 900 W and at least 1000 W or more. The lower power ranges, e.g., 300 W-500 W are particularly suitable for a hand held or battery powered construction as disclosed herein. The suction motor may be positioned at any suitable location within the surface cleaning apparatus  100 , and in any suitable orientation. For example, the suction motor  112  may be positioned above the air treatment member assembly  110 , or alternatively, as illustrated, may be positioned generally below the air treatment member assembly  110 , and optionally may underlie at least a portion of the air treatment member assembly  110 . 
     In the embodiment of  FIG. 7 , the suction motor  112  is positioned below the air treatment member assembly  110 , in the motor housing portion  118  of the lower housing  192  of the cleaning unit  130 . In this example, the suction motor  112  underlies the cyclone chamber  188  and the air exit conduit  290  (see also  FIG. 21 ), and is positioned such that the axis of rotation  330  of the suction motor  112  is generally parallel to, but offset rearwardly from the cyclone axis  276  ( FIG. 21 ). In this configuration, air travels generally downwardly through the air exit conduit  290  and into the suction motor housing  118 . 
     In this embodiment, the suction motor  112  is generally centered between the lateral sides of the cleaning unit  130  in the lateral direction ( FIG. 7 ), and is offset slightly toward the rear side of the cleaning unit  130  in the forward/rearward direction ( FIGS. 20  and  21 ). In this arrangement, the motor axis  330  is parallel to and offset rearwardly from the handle axis  134  (when the handle is in the upright position). 
     The suction motor  112  and the suction motor housing  118  may have any suitable size and shape, and in the embodiment of  FIG. 20 , has a motor diameter  335  (taken at its widest location) that is only slightly less than the depth  230  ( FIG. 18 ) of the air treatment member assembly  110  and/or of the overall depth  201  of the cleaning unit  130 . 
     In the embodiment of  FIG. 20 , the motor diameter  335  is about 90% of the overall depth  201 , and the motor housing  118  extends the entire distance from the rear plane  200  to the front plane  198 . In this arrangement, none of the other operating components of the surface cleaning apparatus (such as the pre-motor filter, air conduits, post-motor filter and the like) is position forward or rearward of the suction motor  112 . This may help reduce the overall depth of the cleaning unit  130 . In this configuration, portions of the post-motor filter  122  are laterally beside the suction motor  112  (such that plane  232  intersects the suction motor  112 ), along with portions of the air flow path (i.e. portions of the wand  222  in this embodiment). Positioning the components laterally with respect to each other may help reduce the overall depth of the cleaning unit  130 . 
     The embodiments of  FIGS. 30, 31 and 52  also have the suction motor  112  in the lateral centre of the cleaning unit  130 , and oriented so that the motor axis  330  is generally upright/vertical when the upright section is in the storage position and parallel to the cyclone axis  276 . 
     Alternatively, instead of positioning the suction motor  112  in the lateral middle of the cleaning unit  130 , it may be offset toward one of the sides of the cleaning unit  130 . This may help align the suction motor  112  with other operating components (such as if the cyclone chamber  188  is offset toward one side of the air treatment member assembly  110 ), and/or may allow for different configurations of the air flow path, and in particular the location and configuration of the post-motor filter as described herein. 
       FIG. 34  illustrates one embodiment where the suction motor  112  is laterally offset toward one side of the cleaning unit  130  (to the left as illustrated). In this embodiment, the cyclone chamber  188  is not offset, and remains in the lateral centre of the air treatment member assembly  110 , such that the motor axis  330  is parallel to the cyclone axis  276 , but is both laterally and forward/rearwardly offset from the cyclone axis  276 . In this configuration, a projection of the motor axis  330  does not intersect the cyclone chamber  188  (although it does pass through the pre-motor filter chamber  194 , post-motor filter chamber  196  and dirt collection chamber  190 ), and a projection of the cyclone axis  276  does not intersect the suction motor  112 . 
     In contrast,  FIG. 31  illustrates an alternative embodiment in which the suction motor  112  is laterally centered, while the cyclone chamber  188  is laterally offset. 
     Positioning the suction motor  112  toward the lower end of the cleaning unit  130  may help lower the position of the centre of gravity of the cleaning unit  130 , which may help facilitate steering and maneuvering of the surface cleaning apparatus  100 . 
     While illustrated with the motor axis  330  in the generally upright direction, the suction motor  112  may also be positioned so that the motor axis  330  is generally horizontal, in orientations analogous to the cyclone chamber configurations described herein. Orienting the suction motor  112  laterally may help reduce the overall height of the cleaning unit  130 . 
     Post-Motor Filter 
     The following is a description of post-motor filters that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the post-motor filters described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the post-motor filter, if provided, is positioned so not increase the depth of the cleaning unit  130 . Accordingly, the post-motor filter may be positioned so as not to be forward and/or rearward of the suction motor. For example, one or more post-motor filters may be positioned laterally from the suction motor and/or below the suction motor. Accordingly, a post-motor filter may be positioned on each lateral side of the suction motor. In such an embodiment, a clean air outlet may be provided on each lateral side of the cleaning unit. 
     The post-motor filter may be housed in a post-motor filter chamber positioned in the air flow path downstream from the suction motor. The post-motor filter may be housed in a suitable post-motor filter housing that can, optionally, be provided on the cleaning unit. The post-motor filter may be any suitable filter, including a physical, porous media filter (foam, felt), filter bag, electrostatic filter, HEPA filter and the like. The post-motor filter may have any suitable physical configuration and may be positioned in any suitable location that is consistent with the cleaning unit and/or air treatment member in a given embodiment of the apparatus  100 . 
     In the embodiment of  FIGS. 7, 20, 31 and 52 , air is exhausted through a clean air outlet  108  provided on each lateral side of the suction motor  112 , and the lower end of the cleaning unit  130  includes two post-motor filter chambers  196 —one positioned on each lateral side of the suction motor housing  118  and suction motor  112  upstream from the respective clean air outlet. A post-motor filter  122 , provided, e.g., in the form of a porous filter media, is positioned in each post-motor filter chamber  196 . Respective clean air outlets  108  are provided on each lateral side of the cleaning unit  130 , each in air flow communication with one of the post-motor filter chambers  196 . The post-motor filters  122  in this embodiment have a depth  336  ( FIG. 20 ) that is less than the depth  201  of the cleaning unit  130 , and less than the diameter  335  of the suction motor  112 . 
     Alternatively, instead of providing post-motor filters  122  on both lateral sides of the suction motor  112 , the apparatus  100  may be configured so that a post-motor filter chamber  196 , and the post-motor filter  122  provided therein, are only provided adjacent one lateral side of the suction motor  112 . For example, in the embodiments of  FIGS. 34 and 46  the suction motor  112  is offset toward one side of the cleaning unit  130 , while the post-motor filter chamber  196 , post-motor filter  122  and a single clean air outlet  108  are positioned toward the other lateral side. In these embodiments, the post-motor filter  122  at least partially overlaps the suction motor  112  in the forward/rearward direction. 
     Optionally, the post-motor filter chamber  196 , and post-motor filter  122 , may be positioned to overlap other components in the forward/rearward direction. Referring to  FIGS. 20 and 46 , in these examples, the post-motor filters  122  are positioned so that portions of the air flow conduits (wand  222  and upflow duct  224 ) are located behind the post-motor filters  122  (i.e. rearward of the post-motor filters in the forward/rearward direction). The depth of the filters in the direction of axis  144  may be reduced (e.g., the may have about the same depth as the portion of the dirt collection regions that they underlie. This may help reduce the overall depth of the cleaning unit  130 . 
     In other embodiments, such as shown in  FIG. 30 , the post-motor filter chamber  196  and post-motor filter  122  are located entirely below the suction motor  112 , such that the post-motor filter  122  does not overlap the suction motor  112  in the vertical/upright direction. In this embodiment, the suction motor  112  overlies at least a portion of the post-motor filter  122 . This may allow other components to be positioned laterally beside the suction motor  112 , such as on board batteries  332 , etc., while still providing a post-motor filter  122  of acceptable size and configuration. Optionally, the post-motor filter  122  may be configured to have the same size and shape as the pre-motor filter  120 . In this embodiment, clean air outlets  108  may be provided on one side of the cleaning unit  130 , both sides of the cleaning unit  130 , the front of the cleaning unit  130  and/or the rear of the cleaning unit  130 , or any combination thereof. 
     Like the pre-motor filters, each post-motor filter  122  has an upstream side, through which air enters the post-motor filter, and an opposing downstream side, through which air exits the post-motor filter. 
     Cleaning Unit Airflow Ducts 
     The following is a description of cleaning unit air flow ducts that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the cleaning unit air flow ducts described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, above floor cleaning assemblies, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect some or all of the air flow conduit of the upright section may be configured to have an aspect ratio that reduces the overall depth of the upright section that houses the cleaning unit. For example, some or all of the portions of the air flow conduit that are co-extensive with the cleaning unit  130  may be non-circular (e.g., elliptical or a parallelogram (e.g., rectangular) so that their lateral extent is greater than their depth in the direction of axis  144 . Accordingly, the volume of the air flow conduits need not be reduced by changing them from circular in cross section, but may be increased by increasing the length of the conduits in a direction transverse to axis  144 . 
     Alternately, or in addition, some or all of the portions of the air flow conduit that are co-extensive with the cleaning unit  130  may be positioned at locations of the cleaning unit that are located inwardly of the outer lateral extent of the cyclone chamber  188 . In this way, the depth of the upright section that houses the cleaning unit need not be increased by the air flow passages that are co-extensive with the cleaning unit or the extent to which they increase the depth may be reduced. 
     It will be appreciated that, when the apparatus  100  is operated in a floor cleaning mode, the air flow conduits that are co-extensive with the cleaning unit may form part of the cleaning unit itself (see the embodiments of  FIGS. 42-48  and  FIGS. 49-52 ) or may be separate removable components (such as a wand—as in the embodiment of  FIG. 1 ). 
     Referring to  FIG. 8  as an example, in the illustrated embodiments the cleaning unit includes an air inlet  338  at its lower end that is in air flow communication with the surface cleaning head air outlet  340 . In this embodiment, the air flow path extends through the pivoting/swivel joint  342  (see also  FIG. 2 ) that structurally connects the cleaning unit  130  to the surface cleaning head  104 . This may reduce the need to provide separate structural and air flow connections. 
     Air then travels upwardly though a the cleaning unit upflow duct  224  which may extend directly to the air treatment member assembly ( FIG. 48 ) or may be indirectly connected to the air treatment member assembly via the wand  222 , the hose  113  and a transition member  344  that has an inlet  346  connected to the hose  113  on one side, and outlet  348  that is connectable to the air inlet of the air treatment member assembly  110  (see also  FIG. 10 ). In this example, the wand  222  has a generally circular cross-sectional shape, but could have a different configuration in other examples. 
     Optionally, the transition member  344  may be configured so that its inlet  346  has a different cross-sectional shape than its outlet  348  (taken in a direction orthogonal to the direction of air travel). For example, in this embodiment the inlet  346  is generally circular to match the transverse cross section of the hose  113 , while the outlet  348  is generally rectangular in cross-sectional shape, with a width  350  and a length  352  ( FIG. 10 ). Using a rectangular shape may help provide a desirable flow area (i.e. the cross-sectional area at the outlet) while having a depth in the forward/rearward direction that is less than the hose diameter  356  ( FIG. 4 ). This may help reduce the overall depth  201  of the cleaning unit  130 . 
     Similarly, some or all of the conduits that are co-extensive with cleaning unit (e.g., up flow duct  224  as exemplified in  FIG. 46  and wand  222 ) may be non-circular as discussed. This embodiment is particularly useful if the up-flow duct  224  extends to the air treatment member inlet. 
     Above Floor Cleaning Assembly 
     The following is a description of above floor cleaning assemblies that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the above floor cleaning assemblies described herein may be used with any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, low profile floor cleaning mode, bendable handle, adjustable handles, hose wraps and other features described herein. 
     Optionally, an above floor cleaning assembly may be provided to allow the apparatus  100  to be used in an above floor cleaning mode. The above floor cleaning assembly may include any suitable apparatus, including a rigid or flexible wand  222 , a flexible air flow conduit such as a hose  113 , auxiliary cleaning tools and the like. Optionally, referring to the embodiments shown in  FIGS. 2, 2A and 49  for example, the cleaning wand  222 , hose  113  or a combination thereof may be detachable from the cleaning unit  130  and used in an above floor cleaning mode. In such a configuration, the air flow connection between the dirty air inlet  106  in the surface cleaning head  104  and the air treatment member assembly  110  would be interrupted and the upstream end  226  of the wand  222  or hose  113  (or auxiliary tool connected thereto) may serve as an auxiliary dirty air inlet for the apparatus  100 . 
     It will be appreciated that the wand and/or hose may or may not form part of the air flow path in the floor cleaning mode. In the embodiment of  FIGS. 2-8 , the wand  222  may be disconnected, such that the upstream end  226  of the wand  222  (the lower end when mounted to the upright section and the upright section is in the stored position) forms an auxiliary dirty air inlet for use in the above floor cleaning mode. Optionally, the upstream end  360  of the hose  113  may be detachable from the downstream end of the wand  222 , such that the upstream end  360  of the hose may alternately form an auxiliary dirty air inlet in another above floor cleaning mode (without the need to detach or use the wand), or alternatively the upstream end  360  of the hose  113  may be connected to a different, auxiliary cleaning tool. In this embodiment, the apparatus  100  may be changed from a floor cleaning mode to an above floor cleaning mode without having to adjust the connection between the hose  113  and the cleaning unit  130  (i.e. at the downstream end of the hose  113 ), and at least the hose  113 , and optionally the wand  222 , may form part of the air flow path in both modes. 
     In the embodiment shown in  FIGS. 49-52 , the apparatus  100  includes a detachable cleaning wand  222  that forms part of the air flow path, but the cleaning wand forms part of the drive handle  124  (i.e. is positioned between the hand grip  136  and acting as the extension member  126 ), rather than forming part of the cleaning unit  130 . To provide air flow communication in a floor cleaning mode, the cleaning unit  130  includes a longer up flow duct  224  than in the embodiment of  FIG. 8 , which may be provided towards the rear side of the cleaning unit  130 . The cleaning wand  222  is positioned to in air flow communication with the outlet end of the upflow duct  224 , and may be secured, e.g., by using a releasable latch  362  ( FIG. 51 ). 
     When the wand  222  is secured, air can travel upwardly through the wand  222  and into the attached hose  113 , which has a downstream end that is connected to the cleaning unit  130 , via a suitable transition member  344 . To transition to an above floor cleaning mode, the upstream end  226  of the wand  222  may be detached, such that both the wand  222  and hose  113  form an above floor cleaning assembly that is part of the air flow path in the above floor cleaning mode. Alternatively, the hand grip portion  136  may be detached from the upper end of the wand  222 , while remaining attached to the hose  113 , or the upstream end  360  of the hose  113  may be detached from the hand grip portion  136 , to provide alternative above floor cleaning configurations, in which only the hose  113  remains part of the air flow path. 
     Alternatively, the apparatus may include an above floor cleaning assembly, optionally including a wand  222  and flexible hose  113 , which do not form part of the air flow path when the apparatus  100  is in the floor cleaning mode. In such embodiments, portions of the air flow path may be reconfigured, and the hose  113  and wand  222  may be connected and/or disconnected to the cleaning unit  130  (or other suitable portion, such as the surface cleaning head  104 ) when changing operating mode. Optionally, one or more valves may be provided in the air flow path to help reconfigure the air flow path as needed. The valves may be manually actuable, or may be automatically actuated by changing the configuration of the apparatus. 
     The embodiment of  FIGS. 42-48 , illustrates one embodiment in which the hose  113  does not form part of the air flow path in the floor cleaning mode, but does form part of the air flow path in an above floor cleaning mode. As shown in  FIGS. 42 and 48 , when the apparatus  100  is in a floor cleaning mode, an air flow path is provided between the dirty air inlet  106  and the air treatment member assembly  110  and includes portions of the joint  342  connecting the cleaning unit  130  to the surface cleaning head  104 , and air flow conduits  224  within the cleaning unit  130 . 
     For example, in this embodiment (and in the other embodiments described herein) the joint  342  allows the cleaning unit  130  to pivot about pivot axis  364  (or otherwise rotate) relative surface cleaning head to an inclined, use position, and, optionally, may also function as a rotatable mount so that the upright section  102  may rotate clockwise or counter clockwise with respect to the surface cleaning head  104  about an upright section rotation axis  366  ( FIG. 42 ) so as to be useable to permit handle  124  to be used to steer the cleaning head  104  left or right. In this embodiment, the rotation axis  366  is inclined relative to the cleaning unit axis  204  (and therefore inclined relative to the drive/handle axis  134 ), but alternatively the joint  342  may be configured so that the axes  366  and  204  are generally parallel to each other, and may be co-axial. The joint  342  may have an internal upflow duct with a generally circular cross-sectional area. 
     As exemplified in this embodiment, the up flow duct  224  may have a generally rectangular perimeter shape and cross-sectional area, and has a vertically extending portion that is laterally offset from the suction motor  112  and its housing  118  and nested behind the post-motor filter  122  ( FIGS. 46 and 47 ). In this configuration, the diameter  335  of the suction motor  112  is greater than the depth  368  of the air flow conduit in the forward/rearward direction of both the vertically extending ( FIG. 46 ) and laterally extending ( FIG. 45 ) portions of the air flow conduit. In this embodiment, the air outlet  286  of the air treatment member assembly  110  is substantially aligned with the air inlet of the suction motor  112  (see also  FIGS. 45 and 46 ). 
     To operate in an above floor cleaning mode, a port  370  on the side of the cleaning unit  130  is opened to provide access to the air flow path. The hose  113  may then be connected to the air flow path. Optionally, a transition member may be provided to connect the generally round outlet end of the hose to the generally rectangular air flow conduit in the cleaning unit. Optionally, the transition member may be configured so that the flow area remains generally constant along the length of the transition member, even as the perimeter shape changes. The transition member may be provided with, and be removable with, the hose  113  as illustrated, or alternatively may be formed as part of the cleaning unit  130  or provided as a separate piece. 
     Preferably, the outlet end of the transition member may be configured to have a generally similar shape as the portion of the air flow path it is intended to be connected with, such as portions of the up flow duct and air flow conduits in the cleaning unit. This may help facilitate mechanical connection of the transition member to the air flow conduits, and may help reduce changes in the flow area along the length of the air flow path. 
     In the illustrated embodiment, the transition member is provided in the form of a transition member  344  that has an inlet end  346  that is generally round (i.e. the same shape as the outlet end of the hose  113 ) and an outlet end  348  that is rectangular (i.e. the same shape as the air flow conduit in the cleaning unit  130 ). In this configuration, the transition member  344  is sized so that at its outlet end  348  its height  372  ( FIG. 48 ) in the upright direction and a length  373  in the lateral direction, each of which can be greater than its depth  368  in the forward/rearward direction ( FIG. 45 ), and optionally can be at least about 1.2 times the depth  368 , at least about 1.4 times the depth  368 , at least 1.6 times the depth, at least 1.8 times the depth or more. This may help reduce the depth  201  of the cleaning unit  130 , and may help provide a desired connection between the hose  113  and the air treatment member assembly  110 . 
     Referring to  FIGS. 43-45 and 47 , to attach the hose  113  to the cleaning unit  130 , the outlet end  348  of the transition member  344  may be inserted into the port  370 . In this position, the sidewall  374  of the transition member  344  blocks the up flow duct  224  in the cleaning unit  130  (interrupting air flow communication between the surface cleaning head  104  and the air treatment member assembly  110 ), and the outlet end  348  of the transition member  344  connects to the air inlet of the air treatment member assembly  110 . To return to floor cleaning mode, the transition member  344  is extracted and the port  370  is closed, thereby re-establishing air flow communication between the air treatment member assembly  110  and the surface cleaning head  104 . Preferably, the port is closed by a door  376  ( FIGS. 42 and 43 ) that is biased to its closed, sealed position ( FIG. 43 ). Alternatively, the door  376  need not be biased. It will be appreciated that, if the outlet of the connector extends to the entrance to a cyclonic air inlet for a cyclone chamber, the cross section of the outlet in the direction of flow is preferably proximate that or the same as that of the entrance to the cyclonic air inlet. 
     In this example, the air inlet of the air treatment member assembly  110 , and the air inlet of the cyclone chamber  188  may each be configured to have a generally similar shape to the air flow conduit  224  and/or the outlet end  348  of the transition member. Accordingly, the air flow path through these conduits may have the same or generally the same cross-sectional area in the flow direction, thereby reducing the back pressure which could be caused by changing the cross sectional area in the flow direction. 
     As exemplified in  FIGS. 46 and 47 , the air inlet  284  of the cyclone chamber  188  may have a height  378  in a direction of a longitudinal axis of the upright section that is ±about 15% of a width  380  of the up flow duct  224  in a direction transverse to the central longitudinal axis  144  and the air inlet  284  of the air treatment member may have a depth in the direction of the longitudinal axis of the upright section that is ±about 15% of the depth of the up flow duct in the direction of the longitudinal axis of the upright section. 
     The air flow conduits  224  in the cleaning unit, and optionally the wand  222  and hose  113 , may have any suitable shape, including rectangular, ovaloid, round and the like. Providing non-round conduits may help provide conduits that can be relatively narrow in the forward/rearward direction while still having a desired flow area. For example, the air flow duct  224  can have a length  380  ( FIG. 46 ) in a lateral direction that is transverse to the central longitudinal axis  144  that is greater than the depth  368  of the air flow duct  224  in the forward/rearward direction (i.e. the direction of the central longitudinal axis  144 ). Optionally, the length  380  may be at least 1.5 times the depth  368 , at least 2 times the depth  368 , at least 2.5 times the depth  368  or more. 
     Low Profile Floor Cleaning Mode 
     The following is a description of a low profile floor cleaning mode that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the low profile floor cleaning mode described herein may be used with vacuums having any of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, bendable handle, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, in addition to be operable in a conventional, upright floor cleaning mode, the apparatus may also be operable in at least one additional floor cleaning mode, such as a low profile cleaning mode for cleaning under furniture and other obstacles. An advantage of this mode is that, using the slab like configuration provided herein, the surface cleaning head may extend further, and possibly, all the way under furniture having a low ground clearance. 
     Preferably, upright section may be reconfigurable to help configure the apparatus  100  in a low profile cleaning mode. For example, the handle  124  may be reconfigurable and/or may be movably connected to the cleaning unit  130  so that the orientation of part or all of the handle  124 , and the hand grip portion  136 , may be changed relative to the cleaning unit  130 . 
     Referring to  FIGS. 12 and 13  as an example of configurations that may be achieved using embodiments described herein (including in  FIGS. 42-57 ), the cleaning unit  130  may be positioned in a low profile mode, in which the cleaning unit axis  204 , and front and rear planes  198  and  200 , are generally horizontal and parallel to the surface being cleaned (i.e. can be parallel and/or within about 15 degrees of parallel or less). In this mode, the overall height  240  of the cleaning unit  130  (i.e. the distance from the ground to the front plane  198 ) may be generally similar to the depth  201  of the cleaning unit  130 , and may be less than about 6 inches and less than 4 inches in some examples. 
     Optionally, an additional low profile support wheel  382  may be provided on the rear face of the cleaning unit  130  (see also  FIG. 2 ). This wheel  382  may be positioned so that it is spaced apart from the floor when the cleaning unit  130  is in an inclined floor cleaning mode, and v contact the floor when the cleaning unit  130  is in the low profile cleaning mode. Providing a support wheel  382  may help the cleaning unit  130  roll across the surface, and may help reduce the chances of the cleaning unit  130  scratching or otherwise damaging the floor. The support wheel  382  may carry at least some of the load of the cleaning unit  130 , which may help reduce the amount of weight felt by a user when operating the apparatus  100  in this mode. Preferably, the support wheel  382  is provided toward the upper end of the cleaning unit  130 , but alternatively may be provided in alternative locations on the cleaning unit  130 . While a single, roller-like support wheel  382  is illustrated, more than one support wheel may be used. Optionally, the support may be any other type of wheel or glide, such as a swivel/castor type wheel that can swivel relative to the cleaning unit, as well as having a rotation axis. This may help the steerability of the apparatus  100  in the low profile cleaning mode. 
     Bendable Handle 
     The following is a description of bendable handles that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the bendable handles described herein may be used with vacuums having any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, adjustable handles, hose wraps and other features described herein. 
     In accordance with this aspect, the push handle  124  of a surface cleaning apparatus is reconfigurable into the low profile cleaning mode whereby the cleaning unit  130  may be position such that the longitudinal axis of the cleaning unit  130  may be oriented so as to extend generally horizontally (e.g., within 25°, 20°, 15°, 10°, 5° of horizontal) or may in fact extend horizontally without the user having to fully bend over. 
     The apparatus may be positionable in the low profile cleaning mode using any suitable mechanism. For example, the handle  124  may be bendable and/or movably connected to the cleaning unit  130 , such that the orientation of the handle, and hand grip  136 , relative to the cleaning unit  130  may be changed. This can allow a common handle  124  and/or hand grip  136  to be used in both the inclined floor cleaning mode and the low profile cleaning mode. Alternatively, a separate low profile handle apparatus may be provided, such that different handles and/or hand grips are used in the different cleaning modes. 
     Preferably, the length  384  ( FIG. 12 ) of the elongate extension member  126  is selected so that when the apparatus is in the low profile cleaning mode the hand grip  136  is at a comfortable height  138  for a user to grasp. For example, the apparatus may be configured so that the height  138  from the floor to the hand grip  136  in the low profile cleaning mode ( FIG. 12 ) may be between about 20 inches and about 40 inches, and preferably is between about 30 inches and about 40 inches. In addition, the apparatus  100  may also be configured so that when the handle  124  is not pivoted, the height  138  from the floor and the hand grip  136  ( FIG. 5 ) is in a desired range, of between about 30 inches and about 48 inches. As discussed subsequently herein, the handle may be telescopically mounted. 
     As exemplified in  FIGS. 1, 12, 13 and 21 , the handle  124  may be moveably mounted to the support structure  212 , preferably at or towards the upper end of the cleaning unit  130 , by a rotational joint which may be in the form of a pivot joint  386 . The pivot joint  386  includes at least a first pivot axis  388 , about which the handle  124  may pivot. In this embodiment, the pivot axis  388  extends in the lateral (i.e., side-to-side) direction. In this embodiment, the handle  124  may pivot forwardly between a generally upright position ( FIG. 1 ), in which the handle axis  134  is generally parallel to the cleaning unit axis  204 , and a low profile position ( FIG. 13 ), in which the handle axis  134  is generally orthogonal to the cleaning unit axis  204 . In the exemplified embodiment, the pivot joint is provided overlying the cleaning unit. Accordingly, when in the upright position, the axis  134  may intersect one or more of the suction motor  112 , the air treatment member assembly  110  (e.g., optionally both the cyclone chamber  188  and dirt collection chamber  190 ) and the pre-motor filter  120  (see also  FIG. 21 ), as well as intersecting the pivot joint  386 . 
     In this example, the support structure  212  may be configured such that it is located to partially or fully overlie the upper end of the cleaning unit  130  (e.g., cross-member  216 ). An advantage of this configuration is that the pivot joint need not be located rearward of the cleaning unit  130  and therefore need not increase the height of the front of the cleaning unit  130  from the floor when the apparatus  100  is in the low profile mode. The pivot joint  386  may be connected to such forwardly extending portion of the support structure  212  (cross-member  216 ), such that the pivot joint  386  may overlie a portion of the air treatment member assembly  110  when the apparatus  100  is in the storage position ( FIG. 21 ). In this configuration, at least some portion of the air treatment member assembly  110  extends rearwardly of the longitudinally extending extension member  126  when the upright section  102  is in the generally upright position ( FIG. 21 ). 
     Preferably, the pivot joint  386  may be locked with the extension member  126  in the upright configuration ( FIGS. 1-5 ), and may be unlocked to allow the extension member  126  to pivot relative to the cleaning unit  130 . Optionally, the pivot joint may be unlockable by applying rotational torque to the pivot joint  368  (e.g., the lock may comprise inter-engaging detents that may rotate by each other when sufficient rotational torque is applied). Optionally, an unlocking actuator may be provided to allow a user to unlock the pivot joint  386 . In the embodiments, the unlocking actuator includes a button  390  that is adjacent the hand grip portion  136 . The button  390  may be pressed by a user, which may urge a linkage rod  392  ( FIG. 21 ) within the extension member  126  downwardly, thereby disengaging a latch  394  member and allowing the extension member  126  to pivot. Optionally, the linkage rod  392  and/or button  390  may be biased toward the locked positions. Other suitable pivoting mechanisms, locking mechanisms and actuators, as well as positioning of the actuator, may be used, including those described in U.S. patent application Ser. Nos. 13/781,470, and 12/720,570 which are incorporated herein by reference. 
     Optionally, the pivot joint  386  may be nested with other components on the cleaning unit  130 , preferably in the forward/rearward direction, which may help reduce the overall depth  201  of the cleaning unit  130 . In the embodiment shown in  FIG. 21 , the pivot joint  386  is located toward the front side of the cleaning unit  130 , and is forward of the hose  113 , and its hose support  396 . In this arrangement, the pivot axis  388  is forward of the air flow path, forward of a central plane of the cleaning unit and overlies portions of the cyclone chamber  188  and dirt collection chamber  190 . When reclined into the low profile cleaning mode, the pivot axis  388  is above and overlies the hose  113 . Arranging the pivot joint  386  toward the front of the cleaning unit  130  may help facilitate placing the hose  113  and hose support  396  toward the rear side of the cleaning unit  130 , while helping to reduce the overall depth  201 . 
     In this embodiment, the pivot joint  386  may at least partially overlie the carry handle  258  on the air treatment member assembly  110  in the forward/rearward direction, when the apparatus is in the storage position ( FIG. 1 ). Nesting the components in this manner may help reduce the overall depth  201  of the cleaning unit  130 . 
     Optionally, as illustrated in the embodiment of  FIGS. 49-52 , the movable portion of the handle may include a portion of the air flow path. 
     Optionally, in addition to pivoting into a low profile use position, the handle  124  may be moveable into a storage position to help reduce the overall size of the apparatus  100  when it is not in use or during shipment. 
     Referring to  FIGS. 14-17 , in one embodiment the handle  124  may be moveably connected to the cleaning unit  130  such that it may be move forwardly to the low profile cleaning position ( FIGS. 12 and 13 ), and may then be moved further forwardly (rotated forwardly) into a storage position as exemplified in  FIG. 14 or 16 . In this embodiment, the pivot joint  386  includes a second pivot axis  398  that is generally parallel to the pivot axis  388 , thus providing two pivot joints, pivot joint  422  having an axis  388  and pivot joint  424  having an axis  398 . When in the storage configuration, the second pivot joint  424  may be positioned above, and may lie in the same plane as, pivot joint  422 . In this position, the second axis  398  may also be forward of the hose  113  and hose support  396 , and may overlie the cyclone chamber  188  and dirt collection chamber  190  ( FIG. 1 ). Alternatively, the second pivot axis  398  may be offset forward or rearwardly form the pivot axis  388 . Preferably, the rotation about the second pivot axis  398  may be restrained by a second lock. The lock may be any suitable mechanism, and may include a release actuator  400  that is provided at any location, e.g., adjacent or as part of pivot joint  424 . In this embodiment, a user may manually release the second lock by releasing the actuator  400  ( FIGS. 14 and 16 ). In this embodiment, when the handle  124  is in the storage position, the handle axis  134  intersects both the first and second pivot joints  386 A and  386 B. That is, the pivot joints  422  and  424  are positioned generally beneath the extension member  126 , along the drive axis of the apparatus  100 . 
       FIGS. 72-76  exemplify another embodiment that comprises two separate pivot joints  422  and  424 . Rotating the elongate member  126  about one of the pivot axes  388  and  398  moves the handle  124  into the low profile cleaning position, and then rotating about the other of the axes  388  and  398  further moves (rotates) the handle  124  into the storage position ( FIG. 76 ). In this embodiment, the handle  124  rotates about the first axis  388  to move into the low profile cleaning position, and about the second axis  398  to move into the storage position. 
     As exemplified in  FIG. 73 , rotation about both axes  388  and  398  may be prevented by locking pivot joint  424  (as shown in  FIGS. 72 and 73 ), and rotation about each axis  388  and  398  may be selectively, and independently, enabled by unlocking pivot joints  422  and  424 . 
     When the lower pivot joint  422  is locked, as illustrated in  FIG. 73 , a tab portion  426  of a lower slider  428  protrudes through a gap  430  in a lower housing  432  and engages an intermediary housing  434 . In this configuration, interference between the tab  426  and the walls of the gap  430  and intermediary housing  434  prevent rotation of the intermediary housing  434  relative to the lower housing  432 , about the first axis  388 . The upper pivot joint  424  may have a generally analogous configuration, in which the upper pivot joint  424  is locked when a tab portion  442  on an upper slider  438  projects through a gap  444  in the intermediary housing  434  and engages an upper housing  446 . 
     To unlock the lower pivot joint  422 , a user may push the button  390  which may be, e.g., on the hand grip  136 . Depressing the button  390  causes the linkage rod  392  to translate along the length of the elongate member  126 . A lower end  436  of the rod  392  pushes on the upper slider  438 , pushing it downwardly (as illustrated). An elongate portion  440  of the upper slider  438  bears against the tab  426 , and downward translation of the upper slider  438  thereby leads to a corresponding downward translation of the lower slider  428 . When the lower slider  428  has been moved sufficiently downwardly, the tab  426  is removed from the gap  430  and disengages the intermediary housing  434 , as shown in  FIG. 74 . In this configuration, the intermediary housing  434  (and everything mounted thereto) can pivot about the first axis  388 . 
     To unlock the upper pivot joint  424 , a user may push the button  390  so that the tab portion  442  is driven out of the gap  444  and disengages the upper housing  446 . In some embodiments, this may be sufficient to allow rotation about the second axis  398 . Alternatively, as illustrated a second release actuator  400  may need to be released to allow rotation about the axis  398 . In this embodiment, when the release actuator  400  remains engaged it is sufficient to inhibit rotation about the axis  398 , even when button  390  is pressed. This may help provide independent control over the unlocking of the upper and lower pivot joint  422  and  424 . 
     In the illustrated embodiment, the release actuator  400  includes a latch member  448  that is mounted to the upper housing  446  and that extends into a corresponding slot  450  in the intermediary housing  424 . When the latch  448  is engaged with the slot  450  ( FIGS. 73 and 74 ) rotation about axis  398  is inhibited. When the latch  448  is withdrawn from the slot  450  ( FIG. 75 ), the upper housing  446  can pivot about the axis  398  relative to the intermediary housing  434 . This can allow the handle to be moved into the storage position ( FIG. 76 ). A similar pivot joint configuration may be used in combination with any one or more of the other embodiments described herein. 
     It will be appreciated that other locking mechanisms known in the handle art may be used. 
     Adjustable Handle Length 
     The following is a description of adjustable handle that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the adjustable handle described herein may be used with vacuums having any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handles, hose wraps and other features described herein. 
     In accordance with this aspect, instead of using a push button, linkage rod and sliders to unlock the pivot joint  386 , the pivot joint  386  may be unlocked by reconfiguring and/or adjusting portions of the handle  124 , cleaning unit  130  or other portion of the apparatus  100 . For example, reconfiguring the push handle  124  may be used to selectively lock one or both pivot joints  422 ,  424 . For example, if the push handle  124  telescopes, e.g., it may comprise a stationary handle member and a moveable telescoping handle member, then the moveable telescoping handle member may be engageable with one or both of the pivot joints  422 ,  424  to lock the pivot joint in position when the handle is telescoped inwardly. For example, as discussed herein, the moveable telescoping handle member may be slidably receivable in one or both of the pivot joints  422 ,  424  thereby locking the pivot joints  422 ,  424  in position. 
     As exemplified in  FIGS. 64-71 , axially telescoping the elongate extension member  126  (the moveable telescoping handle member) along the handle axis  134  may unlock one or both of the pivot joints  422 ,  424  to allow rotation about at least one of the axes  388  and  398 . Optionally, the handle  124  may be configured such that telescoping the extension member  126  to a first position enables rotation about the first axis  388 , and further telescoping the extension member  126  to a second position then enables rotation about the second axis  398 . 
     Referring to  FIG. 64 , in one embodiment the extension member  126  of the handle  124  may be an inner telescoping member that is slidably received in an outer telescoping member in the form of an outer sleeve portion  452  of the upper portion  424  of the pivot joint  386 . Movement between the extension member  126  and the sleeve  452  may be inhibited using any suitable securing apparatus, including, for example, moveable detents  454  provided on the sleeve  452  that engage corresponding holes  456  on the extension member  126  ( FIG. 65 ). 
     In this embodiment, when the extension member  126  is fully inserted within the sleeve  452  ( FIG. 64-65 ) in a retracted position, an outer surface toward the lower end of the extension member  126  provides an abutment member  458  that extends through corresponding channels  460  within the pivot joint  386 , such that interference between the abutment member  458  and a corresponding abutment member  459  (in the form of notches) on the lower housing  432  of the pivot joint  386  inhibits rotation about the first axis  388 . In this position, the outer surface of the extension member  126  also functions as a second abutment member  458  that contacts a corresponding abutment member  462  in the intermediary housing  434  ( FIGS. 69 and 71 ), thereby inhibiting rotation about the upper axis  398 . In this configuration the pivot joint  386  is locked. 
     Referring also to  FIGS. 66-69 , telescoping the extension member  126  away from the lower housing  432  (upwardly as illustrated) to a first extended position may move the lower end of the extension member  126  so that the abutment member  458  does not contact/engage with the abutment member  459  in the lower housing  432 . Disengaging the abutment members  458  and  459  may enable the handle  124  to pivot forwardly about the first axis  388 , and for the handle to be reconfigured into a low profile cleaning position ( FIG. 68 ). In this position, the lower pivot joint  422  is unlocked. When in this position, the abutment member  458  on the extension member  126  remains in contact with the complimentary abutment member  462  on the intermediary housing  434 , thereby continuing to inhibit rotation about the upper axis  398 . 
     In some embodiments, the pivot joint  386  may only include a single pivot joint  386  as exemplified in  FIG. 66 . Alternatively, as illustrated, the pivot joint  386  may include lower and upper pivot joints  422 ,  424  and the handle  124  can be further pivoted into a storage position (for example as shown in  FIG. 14 ). Optionally, the rotation about the second pivot axis  398  may be controlled via a separate secondary actuator, or alternatively may also be controlled by the positioning of the extension member  126 . 
     Referring to  FIGS. 70 and 71 , in the illustrated embodiment the extension member  126  may be further translated relative to the sleeve  452 , to a second extended position. In this embodiment, when the extension member  126  is in the second extended position, the lower end is moved such that the abutment member  458  is removed from the channels  460  and is disengaged from the abutment members  462  in the intermediary housing  434  ( FIG. 71 ). In this configuration, the upper housing  446 , including the sleeve  452  and handle  124  mounted thereto, is free to pivot about the second axis  398 . 
     Alternatively, referring to  FIGS. 53-57 , the pivot joint  386  may include only a single pivot axis, while still permitting the handle to be moved into a low profile cleaning position and a storage position. For example, the pivot joint  386  may be configured as an offset pivot joint, in which the extension member  126  and handle axis  134  are offset rearwardly from the pivot axis  388  by a pivot offset distance  402  ( FIG. 53 ). In this arrangement, the handle  124  may pivot about the pivot axis  388  to operate the apparatus  100  in the low profile floor cleaning mode, and may rotate further about the same pivot axis  388  to move the handle into its storage position ( FIG. 55 ). This embodiment includes an unlocking actuator having, e.g., a button  390  and axially translating linkage rod  392  ( FIGS. 54, 56 and 57 ) that is configured to release a latch member  394  that engages the upper end of the support structure  212  of the cleaning unit  130 . In this embodiment, the handle  124  may be moved to the low profile cleaning position and a storage position by only rotating about one pivot axis  388 . It will be appreciated at alternate actuation means may be used as is known in the art. 
     Optionally, the pivot joint  386  may form part of the air flow path, much like the joint between the cleaning unit  130  and the surface cleaning head  104  can include an internal air flow conduit. For example, in embodiment of  FIGS. 49-52 , the pivot joint  386  includes an upper yolk  404  member that is pivotally connected to a lower yolk member  406 , such that the upper yolk  404  member may pivot about pivot axis  388 . The yolk members  404  and  406  provide a structural, mechanical connection between the handle  124  and the cleaning unit  130 . 
     To provide air flow communication between the wand  222  and the cleaning unit  130 , the pivot joint  386  may include an internal fluid passage. Referring to  FIG. 49 , in the illustrated example the pivot joint  386  includes an internal fluid passage in the form of a flexible hose  408  that is positioned within the yolk members  404 ,  406  and connects the cleaning unit  130  to the inlet end  226  of the wand  222 . Optionally, the hose  113  may be extensible and/or elastic. Preferably, the hose  408  may be formed from the same material, and have generally the same properties as hose  113 . Optionally, instead of being positioned within the yolk members  404 ,  406 , the fluid passage member may be positioned outside the yolk members  404 ,  406 . Alternately, as is known in the art, the pivot joint may be constructed to have an air flow passage therethrough and use rigid members that rotate relative to each other and uses rotating seals or the like such that a flexible hose is not required. 
     The pivot joint  386  may be unlocked using an unlocking actuator, which may use a button  390  connected to a linkage rod  392 . 
     Optionally, in addition to moving relative to the cleaning unit  130 , the handle may also be configured so that the extension member  126  and/or hand grip  136  can rotate about the handle axis  134 . Referring to  FIGS. 14-17 , rotating the extension member  126  and/or hand grip  136  about the handle axis  134  may alter a storage depth  410  of the apparatus, from a relatively large storage depth  410  ( FIG. 15 ), in which the hand grip  136  protrudes beyond the front end  140  of the surface cleaning head  104 , to a smaller storage depth  410  ( FIG. 17 ), in which no portion of the apparatus  100  may protrude forwardly beyond the front end  140  of the surface cleaning head  104 . 
     Instead of rotating in this manner, the handle  124  may be moved into the storage position in any suitable way, including collapsing or otherwise modifying the shape of the hand grip portion  136 , rotating the hand grip  136  relative the extension member  126 , detaching the extension member  126  from the pivot joint  386  and stowing it in a suitable location, and the like. 
     Hose Wrap 
     The following is a description of hose wraps that may be used by themselves in any surface cleaning apparatus or in any combination or sub-combination with any other feature or features described herein. For example, the hose wraps described herein may be used with vacuums having any one or more of the surface cleaning head, moveable wheels, upright section, air treatment member assemblies, carry handles, cyclone configurations, dirt collection chambers, pre-motor filters, suction motors, post-motor filters, cleaning unit air flow ducts, above floor cleaning assemblies, low profile floor cleaning mode, bendable handles, adjustable handles and other features described herein. 
     In accordance with this aspect, hose is secured in position on the upright section, preferably surrounding the lateral sides of the cleaning unit  130 , such that the hose does not increase the maximum depth of the portion of the upright section that supports the cleaning unit  130 . 
     For example, if the air flow conduits on the upper section  102  include a flexible hose, the cleaning unit  130  may include a hose wrap portion to help support and store the flexible hose when the apparatus is being used in a floor cleaning mode. Optionally, the hose wrap may be provided toward the rear side of the cleaning unit  130 , which may help align the hose  113  with the other air flow conduits in the cleaning unit  130  (such as ducts  224  and wand  222 ). 
     As exemplified in  FIG. 2 , the hose support  396 , also referred to as a hose wrap, may be a curved support with a channel  412  that can receive a portion of the hose  113 . The hose  113  is preferably resiliently extendable, and when seated in the channel  412 , the hose&#39;s resiliency may help retain it in place. When a user detaches the wand  222 , for above floor cleaning, the hose  113  may be lifted generally upwardly out of the channel. 
     Optionally, the hose support  396  may surround an open region, and may also function as a carry handle  416  for lifting the cleaning unit. As exemplified in  FIGS. 26-29 , the curved support channel  412  may form part of the perimeter of a finger gap  414  region that may receive the hand/fingers of a user ( FIG. 28 ). In this embodiment, the support channel  412  bounds part of the finger gap  414 , and other portions of the cleaning unit support structure  212  (such as cross-member  216 ) bound the bottom portion of the finger gap  414 . Providing a carry handle  416  of this nature may help a user grasp and carry the cleaning unit  130  while the apparatus  100  is in use, and may be helpful if the drive handle  124  has been moved into an optional storage position (as shown in  FIGS. 28 and 29  and described herein). It will be appreciated that hose support  396  may be positioned a sufficient distance above support structure  212  and the pivot joint such that a user may easily grasp the hose support (e.g., channel  412 ) without contacting another part of the apparatus  100 . 
     The support channel  412  may be configured so that it provides a sufficient grip area such that a user can pick-up the cleaning unit  130  without contacting the underside of the hose  113 . This may help improve the stability of the carry handle  416 , and may help reduce the chances that the hose  113  may be squeezed or crushed during the lifting process. To that end, the support channel  412  may be sized to receive at least 40% of the hose  113 , and optionally may be sized to receive at least 50% or at least 60% of the hose  113 , and preferably the hose  113  can be nested at least up to its midpoint within the support channel  412 . 
     Optionally, the cleaning unit  130  may be configured so that the hose support  396 , whether configured as a carry handle or not, is the upper most portion of the cleaning unit  130  or the support structure except for the handle  124 . This may help position the hose support  396  at a convenient height for users to interact with the hose wrap  369 , and the hose  113  thereon. This may also help increase the path length of the hose  113 , from the upper end of the wand  222  to the air inlet of the air treatment member assembly  110 . Increasing the path length in this manner may allow a longer hose  113  to be provided and stored on the cleaning unit  130 , which may help improve the above floor cleaning range. 
     In embodiments having a hose support  396  (see for example  FIGS. 8 and 27 ), when the apparatus  100  is used in the floor cleaning mode, a first vertical portion  416  of the hose  113  may convey air upwardly on one side of the cleaning unit  130  and a second vertical portion  418  of the hose  113  may convey air downwardly on the opposing side of the cleaning unit  130 . In such embodiments, a transverse portion  420  of the hose  113  may extend between the first and second vertical portions  416 ,  418  (and may be generally curved) over the upper end of the cleaning unit  130 . In this configuration, the transverse portion  420  of the hose  113  is positioned vertically above, and may be rearward or forward of the pivot axes  388  and  398 . Also, in this embodiment the first vertical portion  416  of the hose, along with a portion of the wand  222 , may be positioned behind the first dirt collection chamber  190  and the second vertical portion  418  of the hose  113  may be positioned behind the second dirt collection chamber  190  (see for example  FIGS. 7 and 18 ). This can help reduce the overall depth  201  of the cleaning unit  130 . 
     In this embodiment, the first and second vertical portions  416 ,  418  and the transverse portion  420  of the hose and the rigid extension wand  222  (i.e. the above floor cleaning assembly) may all lie in a common, central transverse plane  232 , which in this embodiment may extend through one or both of the suction motor  112  and cyclone chamber  188  (see for example  FIGS. 18 and 20 ) and may be disposed toward the rear side of the cleaning unit  130 . 
     Similarly, in this embodiment, the transverse plane  234  that contains the forward most portions of the rigid wand  222  and hose  113  may be positioned forward of the rearmost portion of the air treatment member assembly  110 , and a rearmost portion of the above floor clean assembly may lie in, or forward of, the rear plane  200  (bounding the rear side of the cleaning unit). 
     What has been described above has been intended to be illustrative of the invention and non-limiting and it will be understood by persons skilled in the art that other variants and modifications may be made without departing from the scope of the invention as defined in the claims appended hereto. The scope of the claims should not be limited by the preferred embodiments and examples, but should be given the broadest interpretation consistent with the description as a whole.