Patent Description:
Extraction cleaners are utilized for cleaning carpets, upholstery, furniture, and other surfaces. Extraction cleaners extract dirt from a surface using both a vacuum system to suction debris and/or fluid from a surface and a fluid delivery system. The fluid delivery system supplies cleaning fluid, such as water, cleaning solution, or a mixture of both, to the surface to be cleaned from a supply tank onboard the extraction cleaner. The recovery system utilizes an onboard suction source that recovers the fluid applied by the fluid delivery system along with dirt and debris, typically drawing the recovered dirt and fluid through a nozzle of a cleaning tool, through a hose fluidly coupled to the suction source, and into a recovery storage tank that is also onboard the extraction cleaner. <CIT> is an example of such a cleaner.

According to the present invention there is provided an extraction cleaner as claimed in claim <NUM>. An extraction cleaner is provided with multiple features enabling a compact design to promote portability while enabling a relatively large capacity supply tank and recovery tank that are secured to a base yet conveniently removable therefrom. The structure of a carrying handle of the extraction cleaner may be utilized in order to permit the supply and recovery tanks to be taller, and therefore provide needed tank volume without expanding a width of the base. The extraction cleaner may be, but is not limited to, a cordless portable extraction cleaner.

An extraction cleaner within the scope of the disclosure may include a base, a supply tank assembly, and a recovery tank assembly. The base may include a housing that has a first side wall and a second side wall opposite from the first side wall. The base may have a supply tank seat adjacent to the first side wall and a recovery tank seat adjacent to the second side wall. The base may have a handle extending from the first side wall and the second side wall and above the housing. The handle may include a grip portion, a first leg portion extending from the first side wall to the grip portion, and a second leg portion extending from the second side wall to the grip portion. The supply tank assembly may be configured to be received by the supply tank seat, with an inner wall of the supply tank assembly interfitting with the first side wall of the housing and with the first leg portion of the handle and extending along the first leg portion to the grip portion. The recovery tank assembly may be configured to be received by the recovery tank seat, with an inner wall of the recovery tank assembly interfitting with the second side wall of the housing and with the second leg portion of the handle and extending along the second leg portion to the grip portion. With this configuration, the handle is used to support the recovery tank assembly and supply tank assembly along a greater extent of the handle's height than existing extraction cleaners, allowing the tanks to also have a greater height and without needing to expand the width of the tanks or the housing to achieve desired tank volumes.

An extraction cleaner within the scope of the disclosure may include a base that has a housing, a supply tank assembly, and a recovery tank assembly. The housing may have a first side wall and a second side wall opposite from the first side wall, a supply tank seat adjacent to the first side wall, a recovery tank seat adjacent to the second side wall, and a handle extending from the first side wall and the second side wall and above the housing. The supply tank assembly may be configured to be received by the supply tank seat, with an inner wall of the supply tank assembly interfit with the first side wall of the housing and with the handle. The recovery tank assembly may include a recovery tank configured to be received by the recovery tank seat, with an inner wall of the recovery tank assembly interfit with the first side wall of the housing and with the handle. The recovery tank assembly may include a recovery tank lid on the recovery tank opposite from the recovery tank seat. In an implementation, the handle does not extend laterally outward over the recovery tank lid. A latching assembly may be operable to engage a feature at an inner wall of the recovery tank assembly to latch the recovery tank assembly to the base when the inner wall of the recovery tank assembly is interfit with the second side wall. For example, the base may have a notch, such as at the handle, and the latching assembly may include a spring-biased latch at the notch. The feature at the inner wall of the recovery tank assembly may be a projection that extends into the notch and is engaged by the spring-biased latch when the inner wall of the recovery tank assembly is interfit with the second side wall of the housing and with the handle. In an embodiment in which the notch is at the handle, the recovery tank assembly is secured near its upper extent, which may lend stability to the extraction cleaner when in use.

Additionally, a suction hose and a liquid delivery line may be securable to the base via a mount that may have features to limit rocking and/or twisting of the suction hose relative to the base during use. For example, an extraction cleaner within the scope of the disclosure may include a base that has a housing. A suction source may be within the housing and may be operable to generate a working air stream. A fluid pump may also be within the housing. The extraction cleaner may include a first coupling for fluid communication with the fluid pump and a second coupling for fluid communication with the suction source. The first coupling and the second coupling may be disposed adjacent to one another on the base. The extraction cleaner may include a suction hose having an inlet through which the working air stream is drawn through the suction hose and having an outlet configured to couple to the second coupling. A mount may be supported on and may surround at least a portion of an outer wall of the suction hose adjacent to the outlet and at an opening in the outer wall. A fluid delivery line may be configured to couple to the first coupling and may be routed through the mount and through the opening in the outer wall of the suction hose such that the fluid delivery line has a first portion extending through the mount to the opening and a second portion internal to the suction hose and extending between the opening and the inlet of the suction hose. The fluid delivery line is thus spaced apart from the outlet of the suction hose so as not to block or reduce flow at the outlet. The mount helps to ensure that the suction hose and the fluid delivery line extending through the suction hose remain coupled to the base. The suction hose and fluid delivery line are conveniently removable in unison by the customer by removing the mount from the base.

Despite the spatial limitations of a compact, portable extraction cleaner, a battery pack may be located within the housing, and the housing may be configured to promote cooling of the battery pack. For example, an extraction cleaner may include a base having a housing defining an internal cavity and having a first side wall, a second side wall opposite from the first side wall, a supply tank seat adjacent to the first side wall, a recovery tank seat adjacent to the second side wall, and a handle extending from the first side wall and the second side wall above a top wall of the housing. The extraction cleaner may include a motor and impeller assembly disposed within the internal cavity between the recovery tank seat and the supply tank seat and operable to generate a working air stream. The extraction cleaner may also include a battery pack disposed within the housing above the motor and impeller assembly, and a cooling fan disposed within the housing between the battery pack and the motor and impeller assembly and driven by the motor and impeller assembly. The internal cavity may include a cooling space extending around the battery pack and between the battery pack and the housing. The housing may have an air inlet adjacent to the battery pack through which ambient air is drawn into the cooling space by the cooling fan. Stated differently, the housing and the air inlet are configured to promote cooling of the battery pack. In an implementation, the extraction cleaner may include a printed circuit board assembly within the housing above the battery pack and under the top wall of the housing.

It should be understood that even though in the following Figures embodiments may be separately described, single features thereof may be combined into additional embodiments.

The present illustrated embodiments reside primarily in combinations of method steps and apparatus components related to an extraction cleaner. Accordingly, the apparatus components and method steps have been represented, where appropriate, by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein. Further, like numerals in the description and drawings represent like elements.

With reference to <FIG>, the present disclosure generally relates to an extraction cleaner <NUM> and various aspects thereof for improved performance, compactness, ease of use, and other benefits. The extraction cleaner <NUM> includes a base <NUM> that has a housing <NUM>, with a notched region formed by a laterally extending portion 14A and a vertically extending side portion 14B for selectively receiving components, and a handle <NUM> extending upward from the housing <NUM>. The handle <NUM> includes a bottom portion 16A, a grip portion 16B, a first leg portion 16C extending between the bottom portion 16A and the grip portion 16B, and a second leg portion 16D extending between the bottom portion 16A and the grip portion 16B. As further discussed herein, a supply tank assembly <NUM> and a recovery tank assembly <NUM> are both seated on the base <NUM> and interfit and mated with both the housing <NUM> and the handle <NUM>. A suction hose <NUM>, which includes a flexible hose portion 22A and a hose fitting 22B, is shown wrapped around a lower skirt <NUM> (see <FIG>) of the base <NUM>.

With reference to <FIG> and <FIG>, a cleaning tool <NUM> is in fluid communication with an inlet <NUM> of the suction hose <NUM> when secured to a wand <NUM> connected to a hose connector <NUM> at the inlet <NUM>. The cleaning tool <NUM> includes a suction nozzle <NUM> and agitators (see <FIG>), such as, but not limited to, bristles. A spray nozzle <NUM> is disposed on an underside of the cleaning tool <NUM> for selectively dispensing cleaning fluid on the surface S to be cleaned ( e.g., by depression of a trigger that may be disposed on an underside of the wand <NUM>). A retainer <NUM> (see <FIG> and <FIG>) supports the wand <NUM> when the cleaning tool <NUM> is not in use.

The housing <NUM> defines an internal cavity <NUM> (shown in <FIG> and <FIG>) divided into a lower cavity portion 40A and an upper cavity portion 40B by internal walls <NUM> that serve as a motor housing. The lower cavity portion 40A houses a suction source <NUM>, such as a motor and impeller assembly <NUM>, <NUM>, positioned therein, including a suction motor <NUM> and an impeller <NUM>. The upper cavity portion 40B houses a battery pack <NUM>, including one or more battery cells 56A and a battery cover 56B, and a printed circuit board assembly (PCBA) <NUM> discussed herein. The motor and impeller assembly <NUM>, <NUM> is disposed in the internal cavity <NUM> between a supply tank seat <NUM> and a recovery tank seat <NUM> (see <FIG>) and discussed herein.

Referring to <FIG> and <FIG>, an outlet <NUM> of the suction hose <NUM> is in fluid communication with the suction source <NUM> and with the recovery tank assembly <NUM> via one or more conduits <NUM> disposed in the internal cavity <NUM> (see <FIG>), and is retained to the base <NUM> with improved stability via a mount <NUM> that has an inner mount portion 88A and an outer mount portion 88B that defines an opening 88C, as further discussed herein. The suction source <NUM> is in fluid communication with the suction nozzle <NUM> of the cleaning tool <NUM> through the conduits <NUM>, the suction hose <NUM>, and the wand <NUM>, for generating a working air stream, and the recovery tank assembly <NUM> separates and collects fluid and debris from the working airstream for later disposal.

The supply tank assembly <NUM> is in fluid communication with the spray nozzle <NUM> of the cleaning tool <NUM> via a fluid delivery line <NUM>. The fluid delivery line <NUM> includes an end 104A proximate to the base <NUM>, a first portion 104B extending through the mount <NUM>, and a second portion 104C that extends internally within the suction hose <NUM> (see, e.g., <FIG> and <FIG>) and through which pressurized fluid is delivered from the supply tank assembly <NUM> via a fluid pump <NUM> disposed in the internal cavity <NUM>. The fluid pump <NUM> is in fluid communication with the supply tank assembly <NUM> via a fluid line <NUM> (shown in cross-section in <FIG>).

During operation, the extraction cleaner <NUM> draws in the fluid and debris-laden working airstream through the suction nozzle <NUM> and into a recovery tank <NUM> of the downstream recovery tank assembly <NUM>. The recovery tank <NUM> includes a lower wall portion 110A extending from a bottom wall 110B and an exterior wall 110C extending from the lower wall portion 110A to a top 110D of the recovery tank <NUM>. In the recovery tank <NUM>, the fluid and debris are substantially separated from the working airstream. The working airstream then exits the recovery tank assembly <NUM> and passes through the motor and impeller assembly <NUM>, <NUM> prior to being exhausted from the extraction cleaner <NUM>. The recovery tank <NUM> can be periodically emptied of collected fluid and debris by removing the recovery tank assembly <NUM> from the base <NUM> as discussed herein and removing a lid <NUM> having a top 118A of the recovery tank assembly <NUM>.

In <FIG> and <FIG>, the supply tank assembly <NUM> and the recovery tank assembly <NUM> are shown seated on the base <NUM>, and the suction hose <NUM> is shown wrapped around the base <NUM>. The suction hose <NUM> would be unwound from the base <NUM> and the suction nozzle <NUM> of the cleaning tool <NUM> placed adjacent to the surface S shown in <FIG> for use in cleaning the surface S. The surface S may be, for example, any type of flooring, including soft surfaces, such as carpet and rugs, upholstered furniture, and hard surfaces, such as tile, wood, vinyl, and laminate surfaces. However, the aspects disclosed herein may be implemented on other types and configurations of cleaners within the scope of the disclosure.

With reference to <FIG> and <FIG>, for purposes of description related to the figures, the terms "upper," "lower," "right," "left," "rear," "front," "vertical," "horizontal," "inner," "outer," and derivatives thereof shall relate to the extraction cleaner <NUM> as oriented in <FIG> from the perspective of a user in front of the extraction cleaner <NUM> (e.g., facing the extraction cleaner <NUM> in <FIG>), which defines the front <NUM> of the extraction cleaner <NUM>. A rear wall <NUM> of the housing <NUM> is at the rear <NUM> of the extraction cleaner <NUM> and has an air inlet <NUM> shown partially covered by an inlet grill <NUM>. Ambient air is drawn in through the air inlet <NUM> for cooling the battery pack <NUM> (shown in <FIG> and <FIG>), as discussed further herein.

The front <NUM> of the extraction cleaner <NUM> is opposite from the rear <NUM>. It should be appreciated that the front <NUM> and the rear <NUM> are defined as such for purposes of discussion only. A front wall <NUM> of the housing <NUM> is shown at the front <NUM>. The rear wall <NUM> extends parallel with the front wall <NUM>. A first side <NUM> of the extraction cleaner <NUM> is on the right side in <FIG>, and a second side <NUM> of the extraction cleaner <NUM> is on the left side in <FIG>. A vertical axis V in <FIG> indicates an upward direction (upward arrowhead) and a downward direction (downward arrowhead). A lateral axis L indicates a laterally-outward direction (the arrowhead to the left on the lateral axis L, also referred to as outward), and a laterally-inward direction (the arrowhead to the right on the lateral axis L, also referred to as inward). An inner or internal component or surface will be closer to a vertical center axis CA of the extraction cleaner <NUM> along the lateral axis L (or along a horizontal axis that is perpendicular to the lateral axis L) than will an outer or external component or surface.

The housing <NUM> includes a first side wall <NUM> that extends from the front wall <NUM> to the rear wall <NUM> and is at the first side <NUM> relative to the center axis CA (see, e.g., <FIG> and <FIG>). The first side wall <NUM> includes a protruding vertical column 136A between a rear planar portion 136B and a front planar portion 136C. The housing <NUM> also includes a second side wall <NUM> that also extends from the front wall <NUM> to the rear wall <NUM> and is closer to the second side <NUM> relative to the center axis CA (see, e.g., <FIG>). The second side wall <NUM> includes a protruding vertical column 138A between a rear planar portion 138B and a front planar portion 138C.

A top wall <NUM> of the housing <NUM> includes a rear top wall portion 140A that extends forward from the rear wall <NUM> between the first side wall <NUM> and the second side wall <NUM> to the bottom portion 16A of the handle <NUM> as best shown in <FIG> and <FIG>. The top wall <NUM> of the housing <NUM> also includes a front top wall portion 140B that extends rearward from the front wall <NUM> between the first side wall <NUM> and the second side wall <NUM> to the bottom portion 16A of the handle <NUM> as shown in <FIG>. The top wall <NUM> and the bottom portion 16A of the handle <NUM> extend over the upper cavity portion 40B of the internal cavity <NUM>, as shown in <FIG>. The handle <NUM> extends above the top wall <NUM>.

As shown in <FIG> and <FIG>, the handle <NUM> includes a grip portion 16B, a first leg portion 16C extending from the first side wall <NUM> to the grip portion 16B, and a second leg portion 16D extending from the second side wall <NUM> to the grip portion 16B. The bottom portion 16A, the grip portion 16B, and the leg portions 16C, 16D together define an opening <NUM> through which fingers of a hand can extend when the hand is gripping the grip portion 16B to carry the extraction cleaner <NUM>.

The first leg portion 16C is continuous with and extends upward from the protruding vertical column 136A of the first side wall <NUM> as best shown in <FIG> and <FIG>. The second leg portion 16D is continuous with and extends upward from the protruding vertical column 138A of the second side wall <NUM> as best shown in <FIG> and <FIG>.

<FIG> is a perspective view of the extraction cleaner <NUM> showing the supply tank seat <NUM> and the recovery tank seat <NUM> of the base <NUM>. The supply tank seat <NUM> is adjacent to the first side wall <NUM>. The housing <NUM> includes a first lower side wall <NUM> that is an arced or arcuate, vertically-extending wall that wraps around the supply tank seat <NUM> from the front wall <NUM> to the rear wall <NUM>, partially surrounding the supply tank seat <NUM> so that it is enclosed from the first side <NUM> and is open from above. The first lower side wall <NUM> is shorter than the first side wall <NUM>.

In contrast, the housing <NUM> forms a lower rim <NUM> that wraps around the recovery tank seat <NUM> from the front wall <NUM> to the rear wall <NUM>. This same rim <NUM> extends at the bottom of the first lower side wall <NUM>, as shown in <FIG> and <FIG>. The recovery tank seat <NUM> thus has greater lateral exposure (at the second side <NUM>) than the lateral exposure of the supply tank seat <NUM> at the first side <NUM>, as shown in <FIG>. This helps to enable the removal of the recovery tank assembly <NUM> in the manner discussed herein.

Additionally, because the recovery tank seat <NUM> is disposed lower than the supply tank seat <NUM>, the recovery tank <NUM> has a greater height than a supply tank <NUM> of the supply tank assembly <NUM>. The supply tank <NUM> includes a lower wall portion 154A extending from a bottom wall 154B and an exterior wall 154C extending from the lower wall portion 154A. Given the greater height of the recovery tank <NUM>, that the recovery tank <NUM> and the supply tank <NUM> have a same width and length, and that each extends to approximately the same height on the handle <NUM>, the recovery tank <NUM> has a greater internal volume than the supply tank <NUM>.

Because the recovery tank <NUM> should have sufficient volume to contain the maximum fill volume of the supply tank <NUM> after pickup of the dispensed cleaning fluid and additional internal volume for separation of the air portion of the working air stream, providing the lower recovery tank seat <NUM> can achieve these goals while still maintaining a top portion <NUM>, including a top 156A, of the supply tank <NUM> and the recovery tank lid <NUM> at approximately the same height. Each of the supply tank <NUM> and the recovery tank <NUM> with the lid <NUM> extend to a height that is slightly lower than the top of the grip portion 16B so as not to interfere with accessing the grip portion 16B. Additionally, by placing the supply tank seat <NUM> higher (e.g., elevated above the skirt <NUM> and the rim <NUM> by the first lower side wall <NUM>), the internal cavity <NUM> can extend under the supply tank seat <NUM> to the first lower side wall <NUM>, providing additional packaging space for the fluid line <NUM> and other components, as shown in <FIG>.

<FIG> shows the supply tank assembly <NUM> that includes the supply tank <NUM> with an integral supply tank top portion <NUM>, and a cap assembly <NUM> threaded to a neck <NUM> of the supply tank <NUM>. The cap assembly <NUM> includes an external threaded ring <NUM> and a cap <NUM> on which the ring <NUM> is rotatably mounted so that the ring <NUM> is rotatable relative to the cap <NUM>. The cap assembly <NUM> is removable so that the supply tank <NUM> may be filled with cleaning fluid through the neck <NUM>. A plunger valve <NUM> is disposed in the center column of the cap <NUM> and is shown in phantom in <FIG>.

As shown in <FIG>, the supply tank seat <NUM> has a receiver opening <NUM> and a seal <NUM> disposed around the receiver opening <NUM>. The seal <NUM> is shown at the opening <NUM> for purposes of illustration but may be carried on the cap <NUM> to seal the cap <NUM> at the receiver opening <NUM>. A screen <NUM> is disposed over the opening <NUM>. The cap <NUM> is sized to be received within the receiver opening <NUM> and a receiving component <NUM> functionally mates with the cap <NUM> at the opening <NUM> to actuate the valve <NUM>, opening the valve <NUM> and allowing flow from the supply tank <NUM> through the cap <NUM> and then through the fluid line <NUM> (shown in <FIG>) that extends to the fluid pump <NUM>. The supply tank assembly <NUM> thus fluidly couples with the fluid pump <NUM> at the supply tank seat <NUM>.

A user sets the supply tank assembly <NUM> at the supply tank seat <NUM> to actuate the valve <NUM>. The lower wall portion 154A of the supply tank <NUM> is supported against the first lower side wall <NUM> inward thereof and has an arcuate shape that mates to the arcuate shape of the first lower side wall <NUM>. The exterior wall 154C of the supply tank <NUM> above the lower wall portion 154A also has an arcuate shape that matches the arcuate shape of the first lower side wall <NUM>, extending flush with the first lower side wall <NUM> above the first lower side wall <NUM>. The bottom wall 154B of the supply tank <NUM> is supported at the supply tank seat <NUM> shown in <FIG>.

As shown in <FIG>, the supply tank <NUM> of the supply tank assembly <NUM> has an inner wall <NUM> that forms a vertical inner channel 180A between a rear planar portion 180B and a front planar portion 180C of the inner wall <NUM>. The vertical channel 180A extends from the bottom wall 154B of the supply tank assembly <NUM> (e.g., the bottom wall 154B of the supply tank <NUM>) to a top of the supply tank assembly <NUM> (e.g., to the top 156A of the top portion <NUM>), opening upward at the top 156A of the top portion <NUM>.

The supply tank assembly <NUM> is configured to be received by the supply tank seat <NUM>, with the inner wall <NUM> interfitting with the first side wall <NUM> of the housing <NUM> and with the first leg portion 16C of the handle <NUM>, extending along the first leg portion 16C to the grip portion 16B, as best shown in <FIG>. Specifically, the protruding vertical column 136A interfits with and is nested in the vertical channel 180A of the supply tank <NUM>, and the first leg portion 16C also interfits with and is nested in the vertical channel 180A above the vertical column 136A. The vertical channel 180A extends to the grip portion 16B when the supply tank <NUM> is seated at the supply tank seat <NUM>.

The first leg portion 16C is vertical and protrudes laterally further than the vertical column 136A (see <FIG>). Because of this, the first leg portion 16C will fill the vertical channel 180A whereas a gap <NUM> will remain in a portion of the vertical channel 180A not filled by the vertical column 136A (see <FIG>). Because the vertical channel 180A extends vertically from the bottom wall 154B to the top 156A of the top portion <NUM>, the handle <NUM> does not extend laterally outward over the supply tank assembly <NUM>. Stated differently, the supply tank assembly <NUM> is disposed adjacent to the handle <NUM> such that there is no part of the supply tank assembly <NUM> directly under the first leg portion 16C when the supply tank assembly <NUM> is seated at the supply tank seat <NUM>. In this way, the supply tank assembly <NUM> is free of any portion of the handle <NUM> extending laterally over the top 156A of the supply tank <NUM>.

The front planar portion 136C of the first side wall <NUM> interfaces with the front planar portion 180C of the supply tank <NUM>, and the rear planar portion 136B of the first side wall <NUM> interfaces with the rear planar portion 180B of the supply tank <NUM>. As best shown in <FIG> and <FIG>, the first leg portion 16C is narrower than the first side wall <NUM> of the housing <NUM>. Additionally, the inner wall <NUM> of the supply tank <NUM> is wider than the first leg portion 16C. Accordingly, when the supply tank assembly <NUM> is seated at the supply tank seat <NUM>, a portion of the inner wall <NUM> (e.g., the top regions of the front planar portion 180C and the rear planar portion 180B) is exposed over the housing <NUM> on opposing sides of the handle <NUM>, including forward of the handle <NUM> (the top region of the front planar portion 180C, as shown in <FIG> and <FIG>) and rearward of the handle <NUM> (the top region of the rear planar portion 180B, as also shown in <FIG> and <FIG>).

<FIG> shows the recovery tank assembly <NUM> that includes the recovery tank <NUM> and the recovery tank lid <NUM> removably couplable to the recovery tank <NUM> for emptying the recovery tank <NUM>. Specifically, the recovery tank lid <NUM> is mounted to the top 110D of the recovery tank <NUM> opposite from the bottom wall 110B of the recovery tank <NUM>.

Referring again to <FIG>, as well as <FIG>, the recovery tank seat <NUM> has a first receiver opening <NUM> and a second receiver opening <NUM>. The recovery tank <NUM> has a first opening <NUM> that mates with the first receiver opening <NUM> and a second opening <NUM> that mates with the second receiver opening <NUM> when the recovery tank assembly <NUM> is received by the recovery tank seat <NUM>. The recovery tank assembly <NUM> fluidly couples with the working air stream via the first receiver opening <NUM>, which provides a mixture of dirty liquid and air from the suction hose <NUM> that travels upward in an inlet pipe <NUM> within the recovery tank <NUM> to a deflector cavity <NUM> within the lid <NUM>, which causes the liquid to fall to the bottom of the recovery tank <NUM> by gravity, separating from the air.

The air can then exit from the recovery tank <NUM> through an opening <NUM> at the bottom of the lid <NUM> through which the air is then routed through the lid <NUM> internally in the recovery tank <NUM> to an outlet pipe <NUM> to the second opening <NUM> and through the conduits <NUM> to the motor and impeller assembly <NUM>, <NUM> to be exhausted from the extraction cleaner <NUM>. A float <NUM> moves upward to close the opening <NUM> in the lid <NUM> at a predetermined liquid level, preventing air flow through the opening <NUM>, thereby indicating a full recovery tank <NUM> and thus prompting the user to empty the recovery tank <NUM>.

The lower wall portion 110A of the recovery tank <NUM> is supported against the lower rim <NUM> and has an arcuate shape that mates to the arcuate shape of the lower rim <NUM> inward thereof. The exterior wall 110C of the recovery tank <NUM> above the lower wall portion 110A also has an arcuate shape that matches the arcuate shape of the lower rim <NUM>, extending flush with the lower rim <NUM> above the lower rim <NUM>. The exterior wall 110C is opposite from an inner wall <NUM>. The bottom wall 110B of the recovery tank <NUM> rests against the recovery tank seat <NUM> as shown in <FIG>.

As shown in <FIG>, the recovery tank <NUM> has the inner wall <NUM> that forms a vertical inner channel 210A between a rear planar portion 210B and a front planar portion 210C of the inner wall <NUM> and which extends from the bottom wall 110B of the recovery tank assembly <NUM> (e.g., the bottom wall 110B of the recovery tank <NUM>) to a top of the recovery tank assembly <NUM> (e.g., to the top 118A of the lid <NUM>), opening upward at the top 118A of the lid <NUM>. Stated differently, the vertical channel 210A extends along both the recovery tank <NUM> and the recovery tank lid <NUM> as a continuous recess in the recovery tank <NUM> and in the recovery tank lid <NUM>.

The recovery tank assembly <NUM> is configured to be received by the recovery tank seat <NUM> with the inner wall <NUM> interfitting with the second side wall <NUM> of the housing <NUM> and with the second leg portion 16D of the handle <NUM>, extending along the second leg portion 16D to the grip portion 16B, as best shown in <FIG> and <FIG>. Specifically, the protruding vertical column 138A interfits with and is nested in the vertical channel 210A of the recovery tank <NUM> and the second leg portion 16D also interfits with and is nested in the vertical channel 210A of the recovery tank <NUM> above the vertical column 138A.

The vertical column 138A extends to the grip portion 16B when the recovery tank <NUM> is seated at the recovery tank seat <NUM>. The second leg portion 16D is vertical and protrudes laterally further than the vertical column 138A and fills the vertical channel 210A whereas a gap <NUM> will remain in a portion of the vertical channel 210A not filled by the vertical column 138A. Because the vertical channel 210A extends vertically from the bottom wall 110B to the top 118A of the lid <NUM>, the handle <NUM> does not extend laterally outward over the recovery tank assembly <NUM>. Stated differently, the recovery tank assembly <NUM> is adjacent to the handle <NUM>, such that there is no part of the recovery tank assembly <NUM> directly under the second leg portion 16D when the recovery tank assembly <NUM> is seated at the recovery tank seat <NUM>. In this way, the recovery tank assembly <NUM> is free of any portion of the handle <NUM> extending laterally over the top 118A of the lid <NUM>.

The front planar portion 138C of the second side wall <NUM> interfaces with the front planar portion 210C of the recovery tank <NUM>, and the rear planar portion 138B of the second side wall <NUM> interfaces with the rear planar portion 210B of the recovery tank <NUM>. As best shown in <FIG>, the second leg portion 16D is narrower than the second side wall <NUM> of the housing <NUM>. Additionally, the inner wall <NUM> of the recovery tank <NUM> is wider than the second leg portion 16D. Due to this, when the recovery tank assembly <NUM> is seated at the recovery tank seat <NUM>, a portion of an inner wall <NUM> (e.g., the top regions of the front planar portion 210C and the rear planar portion 210B) is exposed over the housing <NUM> on opposing sides of the handle <NUM>, including forward of the handle <NUM> (the top region of the front planar portion 210C, as shown in <FIG>) and rearward of the handle <NUM> (the top region of the rear planar portion 210B, as also shown in <FIG>).

With reference to <FIG> and <FIG>, the taller recovery tank <NUM> having more lateral exposure than the supply tank <NUM> as discussed herein (due to the rim <NUM> being shorter than the first lower side wall <NUM>) is releasably latched to the base <NUM> in a manner that ensures stability when the extraction cleaner <NUM> is in use and promotes ease of removal for emptying of the recovery tank <NUM>. Specifically, a latching assembly <NUM>, shown best in <FIG> and <FIG>, is operable to latch the recovery tank assembly <NUM> to the base <NUM> when the inner wall <NUM> of the recovery tank <NUM> is interfit with the second side wall <NUM> of the housing <NUM>. Specifically, the recovery tank assembly <NUM> is latched to the handle <NUM> of the base <NUM>, and more specifically to the second leg portion 16D of the handle <NUM>.

The inner wall <NUM> of the recovery tank <NUM> includes a feature that is engaged by the latching assembly <NUM> to latch the recovery tank assembly <NUM> to the base <NUM> when the inner wall <NUM> of the recovery tank <NUM> is interfit with the second side wall <NUM>. The feature at the inner wall <NUM> of the recovery tank assembly <NUM> is a projection <NUM> having a ramped lip 224A, best shown in <FIG> and <FIG>, which extends from the recovery tank <NUM> in the vertical channel 210A near a top of the recovery tank <NUM> just below the lid <NUM>.

The handle <NUM> of the base <NUM> includes a notch <NUM> that is aligned with the projection <NUM> when the inner wall <NUM> of the recovery tank <NUM> is interfit with the second side wall <NUM>. More specifically, the second leg portion 16D of the handle <NUM> includes the notch <NUM>, as is also apparent in <FIG>. The latching assembly <NUM> includes a spring-biased latch <NUM> at the notch <NUM>, as shown in <FIG>. The spring-biased latch <NUM> includes a latch body <NUM> having a center post 228A and an engagement surface 228B. A spring <NUM> is disposed around the center post 228A of the latch body <NUM> and captured between an internal surface <NUM> of the latch body <NUM> and an inner surface <NUM> of the grip portion 16B of the handle <NUM>. The spring <NUM> may be, but is not limited to, a compression spring, and urges the latch body <NUM> outward to the latched position shown in <FIG> in which it engages the projection <NUM>.

The projection <NUM> has the ramped lip 224A and the engagement surface 228B of the latch body <NUM> is rounded, allowing the engagement surface 228B to slide over the ramped lip 224A as the projection <NUM> moves laterally inward into the notch <NUM> as the recovery tank <NUM> is moved laterally inward to interfit with the second side wall <NUM>. As the projection <NUM> moved inward into the notch <NUM>, the latch body <NUM> is moved against the biasing force of the spring <NUM> by the ramped lip 224A and then is moved by the biasing force for the engagement surface 228B to engage the ramped lip 224A, latching the recovery tank <NUM> with the base <NUM>. The spring <NUM> is selected with a spring rate sufficient to maintain the spring-biased latch <NUM> in the latched state during use of the extraction cleaner <NUM>.

To unlatch the recovery tank assembly <NUM> from the base <NUM>, the user pulls a protrusion <NUM> at the exterior wall 110C of the recovery tank <NUM> opposite from the inner wall <NUM> and the latching assembly <NUM>. The protrusion <NUM> may also be referred to as a pull or pull feature, as the protrusion <NUM> has a downward-opening cavity <NUM> in which the user's fingers may reside while pulling laterally outward on the protrusion <NUM>, similar to operation of a drawer pull. The protrusion <NUM> and the spring-biased latch <NUM> are configured such that pulling the protrusion <NUM> laterally outward away from the handle <NUM> with a force in the direction of arrow F in <FIG> unlatches the latching assembly <NUM> by disengaging the spring-biased latch <NUM> from the projection <NUM>.

The projection <NUM> will force the latch body <NUM> upward, compressing the spring <NUM> as the projection <NUM> moves laterally outward with the recovery tank <NUM>. The rim <NUM> is very low on the recovery tank <NUM> and has an outwardly-flared shape that is evident in <FIG>. This helps to enable the recovery tank assembly <NUM> to pivot slightly outward about the rim <NUM> as the protrusion <NUM> is pulled laterally outward and the latching assembly <NUM> is unlatched (e.g., disengaged from the projection <NUM>). Once the latching assembly <NUM> is unlatched, the user can then lift upward on the recovery tank assembly <NUM> to remove it from the recovery tank seat <NUM>.

The supply tank assembly <NUM> is latched to the base <NUM> via a spring-biased latch <NUM> that is housed under the supply tank seat <NUM> as shown in <FIG>. The latch <NUM> is biased toward the receiver opening <NUM> by a spring <NUM> also housed under the supply tank seat <NUM> (indicated with hidden or dashed lines). The latch <NUM> may engage the neck <NUM> of the supply tank <NUM> under a flange <NUM> (see <FIG>) when the supply tank assembly <NUM> is seated at the supply tank seat <NUM>. To remove the supply tank assembly <NUM>, a user pulls straight upward on the supply tank assembly <NUM>, with the neck <NUM> pushing laterally outward on the latch <NUM> sufficiently to overcome the spring <NUM> and cause the latch <NUM> to retract from the neck <NUM>. To refill the supply tank <NUM>, the supply tank <NUM> is inverted so that the cap <NUM> is facing upward with the top portion <NUM> facing downward, the cap <NUM> is removed, and cleaning fluid is poured into the supply tank <NUM> through the neck <NUM>.

Referring to <FIG> and <FIG>, a cooling fan <NUM> is disposed within the cavity <NUM> of the housing <NUM> between the battery pack <NUM> and the motor and impeller assembly <NUM>, <NUM> and is rotatably driven by the motor and impeller assembly <NUM>, <NUM>. The battery pack <NUM> is disposed within the cavity <NUM> of the housing <NUM> above the motor and impeller assembly <NUM>, <NUM>. The battery pack <NUM> may include a plurality of interconnected battery cells 56A and the battery cover 56B. The battery cells 56A are rechargeable via an external power source, such as a wall plug, that can be connected via a power cord to a charging jack <NUM> shown in <FIG> that is in turn operatively connected to the battery cells 56A via wiring extending from the charging jack <NUM> to the battery pack <NUM> within the internal cavity <NUM>. The extraction cleaner <NUM> is cordless in the implementation shown, in that it is not equipped with a cord connectable to an external power source for powering the extraction cleaner <NUM> during use. Instead, the battery pack <NUM> powers the extraction cleaner <NUM> during use, which increases maneuverability of the extraction cleaner <NUM> during use.

The PCBA <NUM> is disposed within the internal cavity <NUM> in the housing <NUM> above the battery pack <NUM> and may be mounted to the inner side of the top wall <NUM> of the housing <NUM> and/or the inner side of the bottom portion 16A of the handle <NUM>. A user interface <NUM> is disposed at an exterior of the bottom portion 16A of the handle <NUM> and is operatively connected to the PCBA <NUM>. The user interface <NUM> may include a plurality of depressible buttons, switches, touch features, or other components that enable a user to control the operation of the extraction cleaner <NUM>, such as by powering the extraction cleaner <NUM> on or off, selecting operating modes, etc..

As best shown in <FIG> and <FIG>, at least some of the user interface <NUM> is elevated above the exterior of the bottom portion 16A. For example, top surfaces 250A, 250B of at least some buttons of the user interface <NUM> are above an exterior surface <NUM> of the bottom portion 16A, extending into the opening <NUM>.

Additionally, the handle <NUM> and the housing <NUM> are configured to aid in the prevention of water ingress at the user interface <NUM>. For example, the handle <NUM> has an inner ring portion <NUM> that defines the bottom portion 16A, a bottom side of the grip portion 16B, an inner side of the first leg portion 16C, and an inner side of the second leg portion 16D, creating the opening <NUM>. As is apparent in <FIG> and <FIG>, the inner ring portion <NUM> has a front perimeter that defines a front interface FI at which the inner ring portion <NUM> interfits with the top side of the grip portion 16B, with the outer sides of the leg portions 16C, 16D, and with the front top wall portion 140B of the housing <NUM>. Similarly, as is apparent in <FIG>, the inner ring portion <NUM> has a rear perimeter that defines a rear interface RI at which the inner ring portion <NUM> interfits with the top side of the grip portion 16B, with the outer sides of the leg portions 16C, 16D, and with the rear top wall portion 140A of the housing <NUM>.

The inner ring portion <NUM> curves outward and downward from the exterior surface <NUM> of the bottom portion 16A to the rear interface RI at inclined surface <NUM> (best shown in <FIG> and <FIG>) and curves outward and downward from the exterior surface <NUM> of the bottom portion 16A to the front interface FI at inclined surface <NUM> shown in <FIG> (also shown in <FIG>). In this way, the front and rear interfaces FI, RI are both outward of and below the user interface <NUM> to aid in prevention of water ingress into the internal cavity <NUM> of the housing <NUM> at the user interface <NUM>.

The housing <NUM> is constructed such that the internal cavity <NUM> includes a cooling space <NUM> that extends around the battery pack <NUM> between the battery pack <NUM> and the housing <NUM>. More specifically, the cooling space <NUM> extends above the battery pack <NUM> and below the PCBA <NUM> (e.g., between the top wall <NUM> and the battery pack <NUM>, between the front wall <NUM> and the battery pack <NUM>, and between the rear wall <NUM> and the battery pack <NUM>, all as shown in <FIG>). Additionally, the cooling space <NUM> extends between the first side wall <NUM> and the battery pack <NUM>, and between the second side wall <NUM> and the battery pack <NUM>, as shown in <FIG>. The cooling fan <NUM> is disposed directly below the battery pack <NUM> between the internal wall <NUM> and the battery pack <NUM> without other components therebetween.

When the cooling fan <NUM> is powered on (e.g., is rotating about a vertical axis A1 shown in <FIG> and <FIG>), ambient air from outside of the housing <NUM> is drawn into the cooling space <NUM> through the air inlet <NUM> by the cooling fan <NUM>. At least a portion of the rear wall <NUM> extends generally parallel with the rotational axis A1 of the cooling fan <NUM> such that air drawn through the air inlet <NUM> is at an angle to the rotational axis A1 and a flow path P1 of ambient air pulled into the cooling space <NUM> through the air inlet <NUM> by the cooling fan <NUM> is nonlinear. At least a portion of the front wall <NUM> also extends generally parallel with the rotational axis A1. It should be appreciated that the air inlet <NUM> could instead be disposed in the front wall <NUM>.

An example of such the flow path P1 is shown in <FIG>. The flow path P1 includes representative branches P1A, P1B. At least some of the flow of ambient air that enters through the air inlet <NUM> is drawn downward between the rear wall <NUM> of the housing <NUM> and the battery pack <NUM> as represented by branch P1A of the flow path P1. At least some of the flow of ambient air that enters through the air inlet <NUM> flows over the top of the battery pack <NUM> and downward between the front wall <NUM> and the battery pack <NUM> as represented by branch P1B of the flow path P1. Similarly, some of the flow of ambient air that enters through the air inlet <NUM> may go over the top of the battery pack <NUM> and downward between the first side wall <NUM> and the battery pack <NUM>, while some may go over the top of the battery pack <NUM> and downward between the second side wall <NUM> and the battery pack <NUM>. Stated differently, due to the arrangement of the air inlet <NUM>, the cooling fan <NUM>, and the cooling space <NUM>, the cooling air generally flows around the entire battery pack <NUM>.

The nonlinear flow path P1 helps minimize or prevent stagnant areas within the internal cavity <NUM>. As air is drawn in, the warmer air within the internal cavity <NUM> is pushed out by the cooling fan <NUM>. The ambient air may flow over and around all sides of the battery pack <NUM> in the cooling space <NUM>. Superior or improved cooling of the battery pack <NUM> provided by the arrangement of the cooling space <NUM>, the air inlet <NUM>, and the cooling fan <NUM> may extend the charge and/or the useful life of the electrical components, including the motor <NUM>, the PCBA <NUM>, and the battery pack <NUM>.

As previously discussed, the fluid delivery line <NUM> extends through the suction hose <NUM> and is fluidly coupled to the spray nozzle <NUM>, such as by exiting the suction hose <NUM> via a route through the wand <NUM> or coupling to a structure creating a fluid path through the wand <NUM> to the spray nozzle <NUM>. The opposite end 104A of the fluid delivery line <NUM> closer to the base <NUM> includes a fluid delivery line fitting <NUM> that is secured to a first coupling <NUM> for fluid communication with the fluid pump <NUM>. A valve <NUM> is disposed within the housing <NUM> at the first coupling <NUM> and is configured to open when the fitting <NUM> of the fluid delivery line <NUM> couples to the first coupling <NUM>. The open valve <NUM> permits fluid flow from the fluid pump <NUM> (<FIG>), through a feed line <NUM> within the internal cavity <NUM> and connected to the fluid pump <NUM>, and to an inlet <NUM> of the valve <NUM> to provide pressurized fluid flow to the fluid delivery line <NUM>.

The suction hose <NUM> has the inlet <NUM>, described with respect to <FIG>, through which the working air stream is drawn through the suction hose <NUM> by the motor and impeller assembly <NUM>, <NUM>. The suction hose <NUM> includes both the flexible hose portion 22A (shown in <FIG> and <FIG>, for example) and the hose fitting 22B (shown in <FIG> and <FIG>) to which a proximal end of the flexible hose portion 22A is coupled. The hose fitting 22B defines an outlet <NUM> of the suction hose <NUM> and is configured to couple to a second coupling <NUM> disposed adjacent to the first coupling <NUM> on the base <NUM>. The second coupling <NUM> is in fluid communication with the suction source <NUM>.

<FIG> shows the mount <NUM> that is supported on and surrounds at least a portion of an outer wall <NUM> of the hose fitting 22B of the suction hose <NUM> adjacent to the outlet <NUM> of the suction hose <NUM>, as shown in <FIG>. The mount <NUM> includes the outer portion 88B, which has a receiving opening <NUM>, and the inner portion 88A that receives a fastener <NUM> insertable in the opening <NUM>, such that the mount portions 88A, 88B together surround an outer circumference of the hose fitting 22B and an outer circumference of the delivery line fitting <NUM>. The outer portion 88B and the inner portion 88A are also referred to as the outer mount portion 88B and the inner mount portion 88A, respectively.

A bottom wall <NUM> of the housing <NUM> of the base <NUM> includes a platform <NUM> that extends outward under the fittings 22B, <NUM> and the mount <NUM>, as best indicated in <FIG> and <FIG>. The inner mount portion 88A supports the locating post or fastener <NUM> that extends into the opening <NUM> (see <FIG>) in the outer mount portion 88B to couple the outer mount portion 88B to the inner mount portion 88A. The mount <NUM> (with the two mount portions 88A, 88B secured to one another and surrounding the fittings 22B, <NUM>, and with the fluid delivery line <NUM> and the flexible hose portion 22A secured to the respective fittings <NUM>, 22B) fits onto the platform <NUM> and against a vertically extending side of the housing <NUM> of the base <NUM> near or proximate to the bottom wall <NUM>. The portion 14A of the housing <NUM> extends laterally outward so that the mount <NUM> is partially nested between the portion 14A, the platform <NUM>, and the vertically extending side portion 14B of the housing <NUM> as shown in <FIG>.

A pivotable latching assembly <NUM> shown in <FIG> is secured to the outer mount portion 88B and is operable to latch the mount <NUM> to the base <NUM>. The latching assembly <NUM> includes a pivotable latch 304A that is pivotably connected to the outer mount portion 88B at a pivot axis PA shown in <FIG>. Posts <NUM> extend from the outer mount portion 88B at the opening 88C in the outer mount portion 88B and are received in blind holes <NUM> of the pivotable latch 304A as shown in <FIG>. An inner side of the latch 304A latches to a latch receiver 304B (see <FIG>) at the exterior of the base <NUM>.

The mount <NUM> supports the fitting <NUM> of the fluid delivery line <NUM> and the hose fitting 22B of the suction hose <NUM> and properly spaces the components apart from one another so that they may be in alignment for connection with the respective couplings <NUM>, <NUM>. The hose fitting 22B has an opening <NUM> in the outer wall <NUM>, as indicated in <FIG> and <FIG>. The fluid delivery line <NUM> is routed from the first coupling <NUM> and the fitting <NUM> through the mount <NUM> and through the opening <NUM> in the outer wall <NUM> of the hose fitting 22B of the suction hose <NUM> such that the fluid delivery line <NUM> has a first portion 104B extending through the mount <NUM> to the opening <NUM> and a second portion 104C internal to the suction hose <NUM> and extending between the opening <NUM> and the inlet <NUM> of the flexible hose portion 22A of the suction hose <NUM>.

With the first portion 104B exiting the hose fitting 22B at the opening <NUM>, the fluid delivery line <NUM> is thus spaced apart from the outlet <NUM> of the suction hose <NUM> (e.g., the outlet <NUM> of the hose fitting 22B). Keeping the fluid delivery line <NUM> away from the outlet <NUM> provides a greater area of the outlet <NUM> that is unblocked (e.g., increases the flow area through the suction hose <NUM> at the outlet <NUM> of the hose fitting 22B) and increases the ability to effectively pull the working airstream through the suction hose <NUM> and into the recovery tank assembly <NUM> via the suction source <NUM>.

Because both the suction hose <NUM> and the fluid delivery line <NUM> may be moved with the cleaning tool <NUM> in various directions relative to the couplings <NUM>, <NUM> during use of the cleaning tool <NUM> on the surface S of <FIG>, the mount <NUM> is configured to secure to the base <NUM> with features that reduce twisting and outward movement (e.g., rocking) of the mount <NUM> relative to the base <NUM> in addition to the latching assembly <NUM>. For example, <FIG> shows the extraction cleaner <NUM> with the first coupling <NUM> and the second coupling <NUM> disposed adjacent to one another on the base <NUM>, with each of the outer mount portion 88B, the fluid delivery line <NUM>, and the flexible hose portion 22A removed for clarity. The inner mount portion 88A has a recessed track <NUM> that includes a lip <NUM> with an inner wall 314A, a ramped surface 314B, and an outer wall 314C. The outer mount portion 88B is shown in isolation in <FIG> and includes a protruding rib <NUM> and a catch <NUM> disposed over the protruding rib <NUM> and extending inward when the outer mount portion 88B is secured to the inner mount portion 88A and latched to the base <NUM>.

The outer mount portion 88B is coupled to and interfits with the inner mount portion 88A to together at least partially surround (and, as shown, completely radially surround) the fittings 22B, <NUM>. When the outer mount portion 88B is coupled to the inner mount portion 88A with the fastener <NUM>, the protruding rib <NUM> rests in the recessed track <NUM>. Stated differently, the protruding rib <NUM> is shaped and sized to interfit with the recessed track <NUM>. The lip <NUM> interrupts the recessed track <NUM>. The catch <NUM> is positioned on the outer mount portion 88B to engage the lip <NUM> when the protruding rib <NUM> rests in the recessed track <NUM>.

The catch <NUM> slides over the ramped surface 314B of the lip <NUM> and is caught behind an inner wall 314A of the lip <NUM> to engage with the lip <NUM>. The ramped surface 314B ramps upward and inward in a direction from an outer wall 314C of the lip <NUM> to the inner wall 314A. The interfitting and interfacing of the protruding rib <NUM> with the recessed track <NUM> and the catch <NUM> with the lip <NUM> extends in the direction of a longitudinal center axis LA1 of the hose fitting 22B and a longitudinal center axis LA2 of the fluid delivery line fitting <NUM> and thus helps to limit outward rocking of the mount <NUM> (and the hose fitting 22B, the delivery line fitting <NUM>, the fluid delivery line <NUM>, and the flexible hose portion 22A at the mount <NUM>) relative to the base <NUM>.

In addition to the fastener <NUM>, the interfitting rib <NUM> and track <NUM>, and the interfitting lip <NUM> and catch <NUM>, the base <NUM> has a recess <NUM>. An exterior surface <NUM> of the outer mount portion 88B of the mount <NUM> is shaped to fit into the recess <NUM> to limit movement of the mount <NUM> relative to the base <NUM>. More specifically, as shown in <FIG>, the base <NUM> has a wall <NUM> at the recess <NUM> that is angled relative to a longitudinal center axis LA1 of the second coupling <NUM> (which is the same as the longitudinal center axis LA1 of the hose fitting 22B). The exterior surface <NUM> of the outer mount portion 88B defines a ramp <NUM> (see <FIG>) that interfaces with the wall <NUM> of the base <NUM> to help prevent upward rocking of the mount <NUM> (and the hose fitting 22B, the delivery line fitting <NUM>, the fluid delivery line <NUM>, and the flexible hose portion 22A at the mount <NUM>) relative to the base <NUM>.

Moreover, the base <NUM> includes an inner surface <NUM> and the outer mount portion 88B defines a wall <NUM> that fits inward of the inner surface <NUM> and just inward (e.g., forward) of the recess <NUM> and outward of the fittings 22B, <NUM> (see <FIG> and <FIG>). The inner surface <NUM> of the housing <NUM> inward (e.g., forward) of the recess <NUM> is indicated with a partially hidden arrow in <FIG>. The wall <NUM> is represented with hidden lines in <FIG> in position inward of the housing <NUM>. <FIG> shows the wall <NUM> disposed inward of and adjacent to the inner surface <NUM> of the housing <NUM> outward of the fittings 22B, <NUM>.

The inner surface <NUM> of the housing <NUM> will interface with the wall <NUM> to limit outward rocking of the mount <NUM> (and the hose fitting 22B, the delivery line fitting <NUM>, the fluid delivery line <NUM>, and the flexible hose portion 22A at the mount <NUM>) relative to the base <NUM>. In fact, with the engaged catch <NUM> and lip <NUM> below the fittings 22B, <NUM> and the interfacing wall <NUM> and inner surface <NUM> of the housing <NUM> above the fittings 22B, <NUM> and outward of the fittings 22B, <NUM>, twisting of the mount <NUM> (and the hose fitting 22B, the delivery line fitting <NUM>, the fluid delivery line <NUM>, and the flexible hose portion 22A at the mount <NUM>) relative to the base <NUM> due to movement of the flexible hose portion 22A during use of the extraction cleaner <NUM> is limited or prevented by multiple features spaced apart from one another around the fittings 22B, <NUM>. Stated differently, the interfitting features that limit or prevent twisting include the fastener <NUM> that interfits with the fastener opening <NUM>, the lip <NUM> that interfits with the catch <NUM>, and the wall <NUM> that interfits with the inner surface <NUM> of the housing <NUM>. Each of these pairs of features is spaced angularly apart from one another around the longitudinal center axes LA1, LA2 of the fittings 22B, <NUM> to brace the mount <NUM> (and the hose fitting 22B, the delivery line fitting <NUM>, the fluid delivery line <NUM>, and the flexible hose portion 22A at the mount <NUM>) relative to the base <NUM>.

Use of the present device provides a variety of advantages. The extraction cleaner <NUM> thus enables a compact design that fully utilizes the handle <NUM> to help support the supply tank assembly <NUM> and the recovery tank assembly <NUM> and integrates the latching assembly <NUM> into the base <NUM>, such as at the handle <NUM>. The structure of the carrying handle <NUM> of the extraction cleaner <NUM> may be utilized in order to permit the recovery and supply tanks <NUM>, <NUM> to be taller, and therefore provide tank volume without expanding a width of the base <NUM>. The mount <NUM> helps to ensure that the suction hose <NUM> and the fluid delivery line <NUM> remain coupled to the base <NUM> while reducing rocking and twisting of the suction hose <NUM> and the fluid delivery line <NUM> relative to the base <NUM>. Additionally, efficient cooling of the battery pack <NUM> and the PCBA <NUM> is enabled by the placement of the battery pack <NUM> and the PCBA <NUM> above the cooling fan <NUM> and adjacent to the air inlet <NUM> with the cooling space <NUM> that is disposed between multiple walls of the housing <NUM> and the battery pack <NUM> to largely surround the battery pack <NUM>. Additional benefits and advantages may be realized and/or achieved.

The following Clauses provide example configurations of an extraction cleaner disclosed herein.

Clause <NUM>. An extraction cleaner comprising: a base including: a housing having a first side wall and a second side wall opposite from the first side wall; a supply tank seat adjacent to the first side wall; a recovery tank seat adjacent to the second side wall; and a handle extending from the first side wall and the second side wall and above the housing; wherein the handle includes a grip portion, a first leg portion extending from the first side wall to the grip portion, and a second leg portion extending from the second side wall to the grip portion; a supply tank assembly configured to be received by the supply tank seat, with an inner wall of the supply tank assembly interfitting with the first side wall of the housing and with the first leg portion of the handle and extending along the first leg portion to the grip portion; and a recovery tank assembly configured to be received by the recovery tank seat, with an inner wall of the recovery tank assembly interfitting with the second side wall of the housing and with the second leg portion of the handle and extending along the second leg portion to the grip portion.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the inner wall of the supply tank assembly has a vertical channel extending from a bottom wall of the supply tank assembly to a top of the supply tank assembly and shaped to mate with the first side wall and with the first leg portion.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein: the inner wall of the recovery tank assembly has a vertical channel extending from a bottom wall of the recovery tank assembly to a top of the recovery tank assembly and shaped to mate with the second side wall and with the second leg portion.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the recovery tank assembly includes: a recovery tank defining the bottom wall of the recovery tank assembly; and a recovery tank lid removably couplable to the recovery tank; wherein the recovery tank lid is mounted to a top of the recovery tank opposite from the bottom wall of the recovery tank assembly; and wherein the vertical channel extends along both the recovery tank and the recovery tank lid.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, further comprising: a latching assembly operable to latch the recovery tank assembly to the base when the inner wall of the recovery tank assembly is interfit with the second side wall.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the handle includes a notch and the latching assembly includes a spring-biased latch at the notch; and a projection of the recovery tank assembly extends into the notch and is engaged by the spring-biased latch when the inner wall of the recovery tank assembly is interfit with the handle.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the inner wall of the recovery tank assembly has a vertical channel extending from a bottom wall of the recovery tank assembly to a top of the recovery tank assembly and shaped to mate with the second side wall and with the second leg portion; the recovery tank assembly includes a recovery tank defining the bottom wall of the recovery tank assembly and a recovery tank lid removably couplable to the recovery tank assembly; the recovery tank lid is mounted to a top of the recovery tank opposite from the bottom wall of the recovery tank assembly and the vertical channel extends along both the recovery tank and the recovery tank lid; and the projection extends from the recovery tank into the vertical channel of the recovery tank.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein: the recovery tank assembly includes a protrusion at an exterior wall of the recovery tank assembly opposite from the inner wall; and the protrusion and the spring-biased latch are configured such that pulling the protrusion laterally outward away from the handle disengages the spring-biased latch from the projection of the recovery tank assembly.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the housing includes an internal cavity between the first side wall and the second side wall, and the extraction cleaner further comprises: a fluid pump disposed within the internal cavity; a suction source disposed within the internal cavity and operable to generate a working air stream; wherein the supply tank assembly fluidly couples with the fluid pump at the supply tank seat, and the recovery tank assembly fluidly couples with the working air stream at the recovery tank seat; and wherein the recovery tank seat is disposed lower than the supply tank seat and the internal cavity extends under the supply tank seat.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the handle does not extend laterally outward over the recovery tank assembly.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the handle does not extend laterally outward over the supply tank assembly.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the first leg portion of the handle interfitting with the inner wall of the supply tank assembly is vertical.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the second leg portion of the handle interfitting with the inner wall of the recovery tank assembly is vertical.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the first leg portion is narrower than the first side wall of the housing such that a portion of an inner wall of the supply tank assembly is exposed over the housing forward of the handle and rearward of the handle.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the second leg portion is narrower than the second side wall of the housing such that a portion of an inner wall of the recovery tank assembly is exposed over the housing forward of the handle and rearward of the handle.

Clause <NUM>. An extraction cleaner comprising: a base including: a housing having a first side wall and a second side wall opposite from the first side wall; a supply tank seat adjacent to the first side wall; a recovery tank seat adjacent to the second side wall; and a handle extending from the first side wall and the second side wall and above the housing; a supply tank assembly configured to be received by the supply tank seat, with an inner wall of the supply tank assembly interfit with the first side wall of the housing and with the handle; a recovery tank assembly including a recovery tank configured to be received by the recovery tank seat, with an inner wall of the recovery tank assembly interfit with the first side wall of the housing and with the handle; wherein the recovery tank assembly includes a recovery tank lid on the recovery tank opposite from the recovery tank seat; wherein the handle does not extend laterally outward over the recovery tank lid; and a latching assembly operable to engage a feature at an inner wall of the recovery tank assembly to latch the recovery tank assembly to the base when the inner wall of the recovery tank assembly is interfit with the second side wall.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the base includes a notch; the latching assembly includes a spring-biased latch at the notch; and the feature at the inner wall of the recovery tank assembly is a projection that extends into the notch and is engaged by the spring-biased latch when the inner wall of the recovery tank assembly is interfit with the second side wall of the housing and with the handle.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the notch is in the handle.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the recovery tank assembly has an exterior wall with a pull and the latching assembly is unlatched from the projection by pulling the recovery tank assembly laterally outward at the pull.

Clause <NUM>. An extraction cleaner comprising: a base including a housing; a suction source within the housing operable to generate a working air stream; a fluid pump within the housing; a first coupling for fluid communication with the fluid pump and a second coupling for fluid communication with the suction source, the first coupling and the second coupling disposed adjacent to one another on the base; a suction hose having an inlet through which the working air stream is drawn through the suction hose and having an outlet configured to couple to the second coupling; a mount supported on and surrounding at least a portion of an outer wall of the suction hose adjacent to the outlet and at an opening in the outer wall; and a fluid delivery line configured to couple to the first coupling and routed through the mount and through the opening in the outer wall of the suction hose such that the fluid delivery line has a first portion extending through the mount to the opening and a second portion internal to the suction hose and extending between the opening and the inlet of the suction hose, the fluid delivery line thus spaced apart from the outlet of the suction hose.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the housing includes a platform that extends under the mount and supports the mount.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the mount includes an inner mount portion secured to the base and an outer mount portion couplable to the inner mount portion and to the base; the platform or the inner mount portion has either a protruding rib or a recessed track, and the outer mount portion has the other of the protruding rib and the recessed track; and the protruding rib rests in the recessed track when the outer mount portion is coupled to the inner mount portion.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the platform or the inner mount portion has the recessed track and a lip; the outer mount portion has the protruding rib and a catch; and the catch engages the lip when the protruding rib rests in the recessed track.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the lip has a ramped surface over which the catch slides when the catch engages the lip.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, wherein the base has a recess and an exterior surface of the mount is shaped to fit into the recess to limit movement of the mount relative to the base.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the base has a wall at the recess that is angled relative to a longitudinal center line of the second coupling; and the exterior surface of the mount defines a ramp that interfaces with the wall.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, further comprising: a latching assembly pivotably secured to the mount and operable to latch to the base.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, further comprising: a valve disposed within the housing at the first coupling and configured to open when the fluid delivery line couples to the first coupling, the open valve permitting fluid flow from the fluid pump through the fluid delivery line.

Clause <NUM>. An extraction cleaner comprising: a base including a housing defining an internal cavity and having a first side wall, a second side wall opposite from the first side wall, a supply tank seat adjacent to the first side wall, a recovery tank seat adjacent to the second side wall, and a handle extending from the first side wall and the second side wall above a top wall of the housing; a motor and impeller assembly disposed within the internal cavity between the recovery tank seat and the supply tank seat and operable to generate a working air stream; a battery pack disposed within the housing above the motor and impeller assembly; a cooling fan disposed within the housing between the battery pack and the motor and impeller assembly and driven by the motor and impeller assembly; wherein the internal cavity includes a cooling space extending around the battery pack and between the battery pack and the housing; and wherein the housing has an air inlet adjacent to the battery pack through which ambient air is drawn into the cooling space by the cooling fan.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the housing includes a front wall extending downward from the top wall between the first side wall and the second side wall, and a rear wall extending downward from the top wall between the first side wall and the second side wall; and the cooling space extends between the first side wall and a first side of the battery pack, between the second side wall and a second side of the battery pack, between the front wall and a front of the battery pack, between the rear wall and a rear of the battery pack, and between the top wall and a top of the battery pack.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein at least a portion of one of the front wall and the rear wall extends parallel to a rotational axis of the cooling fan and the air inlet is in the portion of the one of the front wall and the rear wall that extends parallel to the rotational axis such that a flow path of ambient air pulled into the cooling space through the air inlet by the cooling fan is nonlinear.

Clause <NUM>. The extraction cleaner of any of clauses <NUM>-<NUM>, further comprising: a printed circuit board assembly within the housing above the battery pack and under the top wall of the housing.

Clause <NUM>. The extraction cleaner of clause <NUM>, further comprising: a user interface at an exterior of the base and operatively connected to the printed circuit board assembly.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the user interface is at an exterior of a bottom portion of the handle. Clause <NUM>. The extraction cleaner of clause <NUM>, wherein at least a portion of the user interface is elevated above the exterior of the bottom portion of the handle.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein: the handle includes an inner ring portion that defines the bottom portion of the handle; and an interface between the inner ring portion and the housing at the bottom portion of the handle is at an inclined surface below the user interface to aid in prevention of water ingress at the user interface.

Clause <NUM>. An extraction cleaner, comprising: a base including: a housing having a first side wall and a second side wall opposite from the first side wall; a supply tank seat adjacent to the first side wall; a recovery tank seat adjacent to the second side wall; and a handle extending from the first side wall and the second side wall and above the housing, wherein the handle includes a grip portion, a first leg portion extending from the first side wall to the grip portion, and a second leg portion extending from the second side wall to the grip portion; a supply tank assembly configured to be received by the supply tank seat and having an inner wall of the supply tank assembly interfitting with the first side wall of the housing and with the first leg portion of the handle, the supply tank assembly extending along the first leg portion to the grip portion; and a recovery tank assembly configured to be received by the recovery tank seat and having an inner wall of the recovery tank assembly interfitting with the second side wall of the housing and with the second leg portion of the handle, the recovery tank assembly extending along the second leg portion to the grip portion.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the inner wall of the supply tank assembly defines a vertical channel extending from a bottom wall of the supply tank assembly to a top of the supply tank assembly and shaped to mate with the first side wall and with the first leg portion.

Clause <NUM>. The extraction cleaner of either of clauses <NUM> or <NUM>, wherein the inner wall of the recovery tank assembly has a vertical channel extending from a bottom wall of the recovery tank assembly to a top of the recovery tank assembly and shaped to mate with the second side wall and with the second leg portion.

Cause <NUM>. The extraction cleaner of any one of clauses <NUM>-<NUM>, wherein the housing includes an internal cavity between the first side wall and the second side wall, and the extraction cleaner further comprises: a fluid pump disposed within the internal cavity, wherein the supply tank assembly fluidly couples with the fluid pump at the supply tank seat; and a suction source disposed within the internal cavity and operable to generate a working air stream, wherein the recovery tank assembly fluidly couples with the working air stream at the recovery tank seat, and wherein the recovery tank seat is disposed lower than the supply tank seat and the internal cavity extends under the supply tank seat.

Clause <NUM>. The extraction cleaner of any one of clauses <NUM>-<NUM>, wherein the first leg portion of the handle interfitting with the inner wall of the supply tank assembly is vertical, and wherein the second leg portion of the handle interfitting with the inner wall of the recovery tank assembly is vertical.

Clause <NUM>. The extraction cleaner of any one of clauses <NUM>-<NUM>, further comprising: a latching assembly operable to latch the recovery tank assembly to the base when the inner wall of the recovery tank assembly is interfit with the second side wall.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the handle includes a notch and the latching assembly includes a spring-biased latch at the notch, and wherein the recovery tank assembly includes a projection that extends into the notch and is engaged by the spring-biased latch when the inner wall of the recovery tank assembly is interfit with the handle.

Clause <NUM>. An extraction cleaner, comprising: a base including: a housing having a first side wall defining a first protruding column and a second side wall defining a second protruding column; a handle coupled to a top of the housing, wherein the handle has a first leg portion extending from the first protruding column and a second leg portion extending from the second protruding column; a supply tank seat disposed adjacent to the first side wall; and a recovery tank seat adjacent to the second side wall; a supply tank assembly configured to be received by the supply tank seat, wherein the supply tank assembly defines a first inner channel configured to receive the first protruding column and the first leg portion when positioned on the supply tank seat; and a recovery tank assembly configured to be received by the recovery tank seat, wherein the recovery tank assembly defines a second inner channel configured to receive the second protruding column and the second leg portion when positioned on the recovery tank seat.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the recovery tank assembly includes: a recovery tank defining a bottom wall of the recovery tank assembly; and a recovery tank lid removably couplable to the recovery tank, wherein the recovery tank lid is mounted to a top of the recovery tank opposite from the bottom wall, and wherein the second inner channel extends along both the recovery tank and the recovery tank lid.

Clause <NUM>. The extraction cleaner of clause <NUM>, wherein the recovery tank assembly has an inner wall defining the second inner channel, and wherein the second inner channel extends from the bottom wall of the recovery tank assembly to a top of the recovery tank lid and is shaped to mate with the second side wall and with the second leg portion.

Clause <NUM>. The extraction cleaner of either of clauses <NUM> or <NUM>, wherein the first leg portion is narrower than the first side wall of the housing such that a portion of an inner wall of the supply tank assembly is exposed over the housing on opposing sides of the handle.

Clause <NUM>, The extraction cleaner of any one of clauses <NUM>-<NUM>, wherein the second leg portion is narrower than the second side wall of the housing such that a portion of an inner wall of the recovery tank assembly is exposed over the housing on opposing sides of the handle.

Clause <NUM>. The extraction cleaner of any one of clauses <NUM>-<NUM>, wherein the supply tank assembly has a bottom wall, an inner wall defining the first inner channel, and a top opposite the bottom wall, the inner wall extending between the bottom wall and the top, and wherein the first inner channel extends from the bottom wall to the top to open upward at the top.

Clause <NUM>. The extraction cleaner of any one of clauses <NUM>-<NUM>, further comprising: a fluid pump disposed within the housing, wherein the supply tank assembly fluidly couples with the fluid pump at the supply tank seat; and a suction source disposed within the housing and operable to generate a working air stream, wherein the recovery tank assembly fluidly couples with the working air stream at the recovery tank seat.

Clause <NUM>. A portable extraction cleaner, comprising: a base including: a housing have a first side wall and a second side wall; a supply tank seat disposed proximate the first side wall; a recovery tank seat disposed proximate the second side wall; and a handle coupled to the housing and extending between the supply tank seat and the recovery tank seat, wherein the handle has a first leg portion extending from the housing proximate the first side wall and a second leg portion extending from the housing proximate the second side wall; a supply tank assembly selectively disposed on the supply tank seat, wherein the supply tank assembly defines a first inner channel; and a recovery tank assembly selectively disposed on the recovery tank seat, wherein the recovery tank assembly defines a second inner channel, and wherein the first and second inner channels are configured to receive the first and second leg portions, respectively, of the handle.

Clause <NUM>. The portable extraction cleaner of clause <NUM>, wherein the recovery tank assembly includes a lid coupled to a top thereof, and wherein the recovery tank assembly is free of the handle extending laterally over the lid.

Clause <NUM>. The portable extraction cleaner of either of clauses <NUM> or <NUM>, the supply tank assembly is free of the handle extending laterally over a top thereof.

Clause <NUM>. The portable extraction cleaner of any one of clauses <NUM>-<NUM>, wherein the first side wall defines a protruding column configured to be received in the first inner channel, and wherein the second side wall defines a protruding column configured to be received in the second inner channel.

Clause <NUM>. The portable extraction cleaner of any one of clauses <NUM>-<NUM>, wherein the base includes a latching assembly, and wherein the recovery tank assembly includes a projection configured to be engaged by the latching assembly when an inner wall of the recovery tank assembly is interfit with the handle.

Clause <NUM>. The portable extraction cleaner of clause <NUM>, wherein the recovery tank assembly includes a pull feature at an exterior wall of the recovery tank assembly opposite from the inner wall, and wherein the pull feature and the latching assembly are configured such that pulling the pull feature laterally outward away from the handle disengages the latching assembly from the projection of the recovery tank assembly.

The terms "comprising", "including", "having", or any other variation thereof, are inclusive and therefore specify the presence of stated features, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, or components.

Further, for purposes of description herein, the terms "upper," "lower," "right," "left," "rear," "front," "vertical," "horizontal," and derivatives thereof, shall relate to the disclosure as oriented in <FIG>. Unless stated otherwise, the term "front" shall refer to a surface closest to an intended viewer, and the term "rear" shall refer to a surface furthest from the intended viewer. It is also to be understood that the specific structures and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims.

While various embodiments have been described, the description is intended to be exemplary, rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible that are within the scope of the embodiments. Any feature of any embodiment may be used in combination with or substituted for any other feature or element in any other embodiment unless specifically restricted. Accordingly, the embodiments are not to be restricted except in light of the attached claims.

Also, various modifications and changes may be made within the scope of the attached claims.

While several modes for carrying out the many aspects of the present teachings have been described in detail, those familiar with the art to which these teachings relate will recognize various alternative aspects for practicing the present teachings that are within the scope of the appended claims. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and exemplary of the entire range of alternative embodiments that an ordinarily skilled artisan would recognize as implied by, structurally and/or functionally equivalent to, or otherwise rendered obvious based upon the included content, and not as limited solely to those explicitly depicted and/or described embodiments.

Claim 1:
An extraction cleaner (<NUM>), comprising:
a base (<NUM>) including:
a housing (<NUM>) having a first side wall (<NUM>) and a second side wall (<NUM>) opposite from the first side wall (<NUM>);
a supply tank seat (<NUM>) adjacent to the first side wall (<NUM>);
a recovery tank seat (<NUM>) adjacent to the second side wall (<NUM>); and
a handle (<NUM>) extending from the first side wall (<NUM>) and the second side wall (<NUM>) and above the housing (<NUM>), wherein the handle (<NUM>) includes a grip portion (16A), a first leg portion (16C) extending from the first side wall (<NUM>) to the grip portion (16A), and a second leg portion (16D) extending from the second side wall (<NUM>) to the grip portion (16A), wherein at least one of the first leg portion (16C) is narrower than then first side wall (<NUM>) and the second leg portion (16D) is narrower than the second side wall (<NUM>);
a supply tank assembly (<NUM>) configured to be received by the supply tank seat (<NUM>) and having an inner wall (<NUM>) of the supply tank assembly (<NUM>) interfitting with the first side wall (<NUM>) of the housing (<NUM>) and with the first leg portion (16C) of the handle (<NUM>), the supply tank assembly (<NUM>) extending along the first leg portion (16C) to the grip portion (16A); and
a recovery tank assembly (<NUM>) configured to be received by the recovery tank seat (<NUM>) and having an inner wall (<NUM>) of the recovery tank assembly (<NUM>) interfitting with the second side wall (<NUM>) of the housing (<NUM>) and with the second leg portion (16D) of the handle (<NUM>), the recovery tank assembly (<NUM>) extending along the second leg portion (16D) to the grip portion (16A), wherein at least one of the inner wall (<NUM>) of the supply tank assembly (<NUM>) defines a vertical channel (180A) to receive the first leg portion (16C) and the inner wall (<NUM>) of the recovery tank assembly (<NUM>) defines a vertical channel (210A) to receive the second leg portion (16D).