Patent Publication Number: US-11389038-B2

Title: Surface cleaning apparatus

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional of co-pending U.S. patent application Ser. No. 16/156,006 filed on Oct. 10, 2018 and which is now allowed, which is a continuation of co-pending U.S. patent application Ser. No. 15/088,876 filed on Apr. 1, 2016, now issued as U.S. Pat. No. 10,219,662, which is a continuation of U.S. patent application Ser. No. 14/822,211, filed Aug. 10, 2015, now issued as U.S. Pat. No. 9,888,817, which claimed priority from U.S. Provisional Patent Application No. 62/093,189, filed Dec. 17, 2014, the entirety of which are hereby incorporated by reference. 
    
    
     FIELD 
     This disclosure relates to the field of surface cleaning apparatus. In some aspects, this disclosure relates to a type of stick vacuum cleaner wherein a hand vacuum cleaner is removably mounted to a drive handle and provides motive power to draw dirty air into the surface cleaning head. 
     INTRODUCTION 
     Various types of surface cleaning apparatus are known. These include upright vacuum cleaner, stick vacuum cleaners, hand vacuum cleaners and canister vacuum cleaners. Stick vacuum cleaners and hand vacuum cleaners are popular as they tend to be smaller and may be used to clean a small area or when a spill has to be cleaned up. Hand vacuum cleaners or handvacs are advantageous as they are lightweight and permit above floor cleaning and cleaning in hard to reach locations. However, they have a limited dirt collection capacity. Upright vacuum cleaners enable a user to clean a floor and may be have a pod that is removably attached for above floor cleaning. In such cases, the pod comprises, e.g., a cyclone, a dirt collection chamber and the suction motor for the upright vacuum cleaner. However, such the pods tend to be bulky since they comprise the total dirt collection capacity for the upright vacuum cleaner. 
     SUMMARY 
     In accordance with one aspect of this disclosure, a stick vacuum cleaner is provided which has a removable hand vacuum cleaner and also a supplemental bin which may function as a main dirt collection bin when the hand vacuum cleaner forms part of the stick vacuum cleaners. An advantage of this design is that the supplemental bin may provide enhanced dirt collection capacity for the stick vacuum cleaner. The supplemental bin may be removable so as to reduce the size of the stick vacuum cleaner when a smaller sized stick vacuum cleaner is desired, e.g., for cleaning in small or confined spaces. 
     In accordance with this aspect, there is provided a multimode surface cleaning apparatus comprising:
         (a) a surface cleaning head having a dirty air inlet;   (b) an upright section moveably mounted to the surface cleaning head, the upright section moveable between a plurality of reclined floor cleaning positions;   (c) a hand vacuum cleaner removably mounted to the upright section, the hand vacuum cleaner comprising a cyclone chamber, a dirt collection region, a suction motor and a clean air outlet; and,   (d) an auxiliary dirt collection assembly removably mounted to the upright section
 
wherein, in a first upright mode of operation, the auxiliary dirt collection assembly is removed from the upright section and the hand vacuum cleaner is in airflow communication with the dirty air inlet and, in a second upright mode of operation, the multimode surface cleaning apparatus is operable with the auxiliary dirt collection assembly mounted to the upright section.
       

     In some embodiments, the auxiliary dirt collection assembly may comprise a dirt collection chamber and when the auxiliary dirt collection assembly is mounted to the upright section, dirt separated in the cyclone chamber is collectable in the dirt collection chamber of the auxiliary dirt collection assembly. 
     In some embodiments, when the auxiliary dirt collection assembly may be mounted to the upright section, the dirt collection chamber of the auxiliary dirt collection assembly is selectively connectable in communication with the dirt collection region of the hand vacuum cleaner. 
     In some embodiments, in the second upright mode of operation, the dirt collection region of the hand vacuum cleaner may be positioned above the dirt collection chamber of the auxiliary dirt collection assembly. 
     In some embodiments, the cyclone chamber may have a dirt outlet and the dirt collection region comprises a dirt collection chamber of the hand vacuum cleaner. 
     In some embodiments, the dirt collection chamber may have a manually openenable dumping door and the dirt collection chamber of the auxiliary dirt collection assembly may be in communication with the dirt collection chamber of the hand vacuum cleaner when the dumping door is opened. 
     In some embodiments, when the auxiliary dirt collection assembly is mounted to the upright section, the dirt collection chamber of the auxiliary dirt collection assembly may be automatically connected in communication with a dirt outlet of the cyclone chamber. 
     In some embodiments, in the second upright mode of operation, the dirt collection region of the hand vacuum cleaner may be positioned above the dirt collection chamber of the auxiliary dirt collection assembly. 
     In some embodiments, the dirt collection region of the hand vacuum cleaner may be in communication with the dirt outlet of the cyclone chamber and the dirt collection region may have a dumping door that is automatically opened when the auxiliary dirt collection assembly is mounted to the upright section and the dirt collection chamber of the auxiliary dirt collection assembly is in communication with the dirt collection region of the hand vacuum cleaner when the dumping door is opened. 
     In some embodiments, the auxiliary dirt collection assembly may comprise a cyclone chamber and a dirt collection region. 
     In some embodiments, in the second upright mode of operation, the cyclone chamber of the auxiliary dirt collection assembly may be connected in series with the cyclone chamber of the hand vacuum cleaner. 
     In some embodiments, in the second upright mode of operation, the cyclone chamber of the auxiliary dirt collection assembly may be connected in parallel with the cyclone chamber of the hand vacuum cleaner. 
     In some embodiments, in the second upright mode of operation, the cyclone chamber of the hand vacuum cleaner may be bypassed and air exiting the cyclone chamber of the auxiliary dirt collection assembly passes through a pre-motor filter of the hand vacuum cleaner, the suction motor and exits via the clean air outlet of the hand vacuum cleaner. 
     In some embodiments, the auxiliary dirt collection assembly may further comprise a pre-motor filter. 
     In some embodiments, in the second upright mode of operation, the cyclone chamber of the auxiliary dirt collection assembly may be connected in parallel with the cyclone chamber of the hand vacuum cleaner. 
     In some embodiments, in the second upright mode of operation, the cyclone chamber of the hand vacuum cleaner and a pre-motor filter of the hand vacuum cleaner may be bypassed and air exiting the cyclone chamber of the auxiliary dirt collection assembly may pass through the pre-motor filter of the auxiliary dirt collection assembly, the suction motor and exits via the clean air outlet of the hand vacuum cleaner. 
     In some embodiments, the auxiliary dirt collection assembly may further comprise an auxiliary dirt collection assembly suction motor. 
     In some embodiments, in the second upright mode of operation, at least a portion of air entering the dirty air inlet may bypass the hand vacuum cleaner and exit via an alternate clean air outlet. 
     In some embodiments, the alternate clean air outlet may be provided on the auxiliary dirt collection assembly. 
     In some embodiments, the hand vacuum cleaner may have a handle and, when the multimode surface cleaning apparatus is in the first and second upright modes of operation, the handle may be a drive handle of the multimode surface cleaning apparatus. 
     In some embodiments, the upright section may comprise an up flow duct and the auxiliary dirt collection assembly may be removably mounted to the up flow duct. 
     In some embodiments, the up flow duct may comprise a rigid extension cleaning wand and the rigid extension cleaning wand may be removable from one of the upright section and the surface cleaning head and, in a first above floor mode of operation, an above floor cleaning unit may comprise the hand vacuum cleaner and the rigid extension cleaning wand. 
     In some embodiments, the up flow duct may comprise a rigid tube, the hand vacuum cleaner may have a handle and, the hand vacuum cleaner may have an air inlet that is drivingly engageable with the rigid tube whereby, when the multimode surface cleaning apparatus is in the first and second upright modes of operation, the handle may be a drive handle of the multimode surface cleaning apparatus. 
     In some embodiments, the auxiliary dirt collection assembly may have a longitudinal axis that is generally parallel to the up flow duct. 
     In some embodiments, the auxiliary dirt collection assembly may comprise a cyclone chamber having a longitudinal axis that is generally parallel to the up flow duct. 
     In some embodiments, the hand vacuum cleaner may be provided on a rear portion of the upright section and the auxiliary dirt collection assembly may be provided on a front portion of the upright section. 
     In some embodiments, the upright section may comprise an up flow duct and the auxiliary dirt collection assembly may be removably mounted to a front side of the up flow duct and a portion of the hand vacuum cleaner may be positioned rearward of the up flow duct. 
     In some embodiments, the suction motor may be positioned rearward of the up flow duct. 
     In some embodiments, the upright section may comprise a lower portion and an upper portion and the upper section may be moveable forwardly relative to the lower section and the auxiliary dirt collection assembly may be removably mounted to the lower section. 
     In some embodiments, the upright section may comprise an up flow duct having a lower portion and an upper portion and the upper section may be moveable forwardly relative to the lower section and the auxiliary dirt collection assembly may be removably mounted to the lower section. 
     In some embodiments, the up flow duct may comprise a rigid tube, the hand vacuum cleaner may have a handle and, the hand vacuum cleaner may have an air inlet that is drivingly engageable with the rigid tube whereby, when the multimode surface cleaning apparatus is in the first and second upright modes of operation, the handle may be a drive handle of the multimode surface cleaning apparatus. 
    
    
     
       DRAWINGS 
         FIG. 1  is a front perspective view of a surface cleaning apparatus in accordance with at least one embodiment; 
         FIG. 2  is a rear perspective view of the apparatus of  FIG. 1 ; 
         FIG. 3  is a side elevation view of the apparatus of  FIG. 1 ; 
         FIG. 4  is a front perspective view of the apparatus of  FIG. 1  with a supplemental dirt collection chamber partially removed; 
         FIG. 5  is a front perspective view of a surface cleaning apparatus in accordance with another embodiment; 
         FIG. 6  is a rear perspective view of the apparatus of  FIG. 5 ; 
         FIG. 7  is a side elevation view of the apparatus of  FIG. 5  with an electrical cord bag; 
         FIG. 8  is a front elevation view of the apparatus of  FIG. 5 ; 
         FIG. 9  is a rear elevation view of the apparatus of  FIG. 5 ; 
         FIG. 10  is a top plan view of the apparatus of  FIG. 5 ; 
         FIG. 11  is a bottom plan view of the apparatus of  FIG. 5 ; 
         FIG. 12  is an exploded front perspective view of the apparatus of  FIG. 5 ; 
         FIG. 12 a    is an exploded front perspective view of an alternate apparatus of  FIG. 5 ; 
         FIG. 13  is a front perspective view of a surface cleaning apparatus in accordance with another embodiment; 
         FIG. 14  is a rear perspective view of the apparatus of  FIG. 13 ; 
         FIG. 15  is a side elevation view of the apparatus of  FIG. 13 ; 
         FIG. 16  is a front elevation view of the apparatus of  FIG. 13 ; 
         FIG. 17  is a rear elevation view of the apparatus of  FIG. 13 ; 
         FIG. 18  is a top plan view of the apparatus of  FIG. 13 ; 
         FIG. 19  is a bottom plan view of the apparatus of  FIG. 13 ; 
         FIG. 20  is a front perspective view of the apparatus of  FIG. 13  with a supplemental cyclone bin assembly partially removed; 
         FIG. 21  is a cross-sectional view taken along line  21 - 21  in  FIG. 1 ; 
         FIG. 22  is a bottom perspective view of a handvac of the apparatus of  FIG. 1 , 
         FIG. 23  is a perspective cross-sectional view of a cyclone bin assembly of the handvac of  FIG. 22  transverse to the cyclone axis; 
         FIG. 23 a    is a top plan view of the cross-section of  FIG. 23 ; 
         FIG. 24  is a front perspective view of the supplemental dirt collection chamber of the apparatus of  FIG. 1 ; 
         FIG. 25  is a cross-sectional view taken along line  25 - 25  in  FIG. 5 ; 
         FIG. 26  is a cross-sectional view taken along line  26 - 26  in  FIG. 13 ; 
         FIG. 27  is a front perspective view of the apparatus of  FIG. 1  in a lightweight upright mode; 
         FIG. 28  is a rear perspective view of the apparatus of  FIG. 1  in the lightweight upright mode of  FIG. 27 ; 
         FIG. 29  is a side elevation view of the apparatus of  FIG. 1  in the lightweight upright mode of  FIG. 27 ; 
         FIG. 30  is a cross-sectional view taken along line  30 - 30  in  FIG. 27 ; 
         FIG. 31  is a front perspective view of the apparatus of  FIG. 1  in an above-floor cleaning mode; 
         FIG. 32  is a rear perspective view of the apparatus of  FIG. 1  in the above-floor cleaning mode of  FIG. 31 ; 
         FIG. 33  is a side elevation view of the apparatus of  FIG. 1  in the above-floor cleaning mode of  FIG. 31 ; 
         FIG. 34  is a front perspective view of the apparatus of  FIG. 1  in a stair-cleaning mode; 
         FIG. 35  is a rear perspective view of the apparatus of  FIG. 1  in the stair-cleaning mode of  FIG. 34 ; 
         FIG. 36  is a side elevation view of the apparatus of  FIG. 1  in in the stair cleaning mode of  FIG. 34 ; 
         FIG. 36 a    is a front perspective view of the apparatus of  FIG. 5  in an above-floor cleaning mode; 
         FIG. 37  is a front perspective view of the apparatus of  FIG. 13  in a lightweight upright mode; 
         FIG. 38  is a rear perspective view of the apparatus of  FIG. 13  in the lightweight upright mode of  FIG. 37 ; 
         FIG. 39  is a front elevation view of the apparatus of  FIG. 13  in the lightweight upright mode of  FIG. 37 ; 
         FIG. 40  is a rear elevation view of the apparatus of  FIG. 13  in the lightweight upright mode of  FIG. 37 ; 
         FIG. 41  is a side elevation view of the apparatus of  FIG. 13  in the lightweight upright mode of  FIG. 37 ; 
         FIG. 42  is a top plan view of the apparatus of  FIG. 13  in the lightweight upright mode of  FIG. 37 ; 
         FIG. 43  is a bottom plan view of the apparatus of  FIG. 13  in the lightweight upright mode of  FIG. 37 ; 
         FIG. 44  is a cross-sectional view taken along line  44 - 44  in  FIG. 37 ; 
         FIG. 44 a    is a perspective view of the apparatus of  FIG. 13  in an above-floor cleaning mode; 
         FIG. 44 b    is another perspective view of the apparatus of  FIG. 13  in the above-floor cleaning mode of  FIG. 44   a;    
         FIG. 45  is a rear perspective view of the supplemental dirt collection chamber of  FIG. 24 ; 
         FIG. 46  is a side elevation view of the supplemental dirt collection chamber of  FIG. 24 ; 
         FIG. 47  is a front perspective view of a surface cleaning apparatus in accordance with another embodiment; 
         FIG. 48  is a cross-sectional view taken along line  48 - 48  in  FIG. 47 ; 
         FIG. 49  is a cross-section view taken along line  49 - 49  in  FIG. 47 ; 
         FIG. 50  is a side elevation view of the apparatus of  FIG. 47 ; 
         FIG. 51  is a front elevation view of the apparatus of  FIG. 47 ; 
         FIG. 52  is a front perspective view of an upright section of the apparatus of  FIG. 13  including a diversion valve in a closed position; 
         FIG. 53  is a front perspective view of the upright section of  FIG. 52  with a cyclone bin assembly seated on a pedal of the diversion valve; 
         FIG. 54  is a front perspective view of the upright section of  FIG. 52  with the cyclone bin assembly connected to a wand, and the diversion valve in the open position; 
         FIG. 55  is a cross-sectional view taken along line  55 - 55  in  FIG. 52 ; 
         FIG. 56  is a cross-sectional view taken along line  56 - 56  in  FIG. 53 ; 
         FIG. 57  is a cross-sectional view taken along line  57 - 57  in  FIG. 54 ; 
         FIG. 58  is a front perspective view of an upright section of the apparatus of  FIG. 13  including another diversion valve in a closed position 
         FIG. 59  is a front perspective view of the upright section of  FIG. 58  with the cyclone bin assembly being connected to a wand, and the diversion valve in the closed position; 
         FIG. 60  is a front perspective view of the upright section of  FIG. 58  with the cyclone bin assembly connected to the wand, and the diversion valve in the open position 
         FIG. 61  is a cross-sectional view taken along line  61 - 61  in  FIG. 58 ; 
         FIG. 62  is a cross-sectional view taken along line  62 - 62  in  FIG. 59 ; 
         FIG. 63  is a cross-sectional view taken along line  63 - 63  in  FIG. 60 ; 
         FIG. 64  is a front perspective view of an upright section of the apparatus of  FIG. 13  including another diversion valve in a closed position; 
         FIG. 65  is a front perspective view of the upright section of  FIG. 64  with the diversion valve in a partially opened position; 
         FIG. 66  is a front perspective view of the upright section of  FIG. 64  mounted to the wand with the diversion valve in an open position; 
         FIG. 67  is a cross-sectional view of the upright section of  FIG. 64 ; 
         FIG. 68  is another cross-sectional view of the upright section of  FIG. 64 ; 
         FIG. 69  is an enlarged view of a portion of  FIG. 68 ; 
         FIG. 70  is a cross-sectional view taken along line  70 - 70  in  FIG. 65 ; 
         FIG. 71  is a cross-sectional view taken along line  71 - 71  in  FIG. 66 ; 
         FIG. 72  is a front perspective view of an upright section of the apparatus of  FIG. 13  with another diversion valve in a closed position; 
         FIG. 73  is a front perspective view of the upright section of  FIG. 72  being connected to the wand and with the diversion valve in a closed position; 
         FIG. 74  is a front perspective view of the upright section of  FIG. 72  connected to the wand and with the diversion valve in an open position; 
         FIG. 75  is a cross-section view taken along line  75 - 75  in  FIG. 72 ; 
         FIG. 76  is a cross-section view taken along line  76 - 76  in  FIG. 73 ; 
         FIG. 77  is a cross-section view taken along line  77 - 77  in  FIG. 74 ; 
         FIG. 78  is a side elevation view of the handvac of the apparatus of  FIG. 1 ; 
         FIG. 79  is a side elevation view of the handvac of the apparatus of  FIG. 5 ; 
         FIG. 80  is a side elevation view of the apparatus of  FIG. 5  in an upright storage position with a surface cleaning head having rearwardly deployed wheels; 
         FIG. 81  is a side elevation view of the apparatus of  FIG. 80  in a reclined in-use position with the rear wheels of the surface cleaning head retracted; 
         FIG. 82  is a front perspective view of the apparatus of  FIG. 13  with a cyclone bin assembly in accordance with at least one embodiment; 
         FIG. 83  is a rear perspective view of the cyclone bin assembly of  FIG. 82  in a closed position; 
         FIG. 84  is a side elevation view of the cyclone bin assembly of  FIG. 82  in a closed position; 
         FIG. 85  is a front elevation view of the cyclone bin assembly of  FIG. 82  in a closed position; 
         FIG. 86  is a front elevation view of the cyclone bin assembly of  FIG. 82  with a cyclone chamber portion in an open position; 
         FIG. 87  is a front elevation view of the cyclone bin assembly of  FIG. 82  with the cyclone chamber portion and a dirt collection portion in open positions; 
         FIG. 88  is a top perspective view of the cyclone bin assembly of  FIG. 82  with the cyclone chamber portion and the dirt collection portion in open positions; 
         FIG. 89  is a front perspective view of the cyclone bin assembly of the apparatus of  FIG. 13 ; 
         FIG. 90  is a rear perspective view of the cyclone bin assembly of  FIG. 89 ; 
         FIG. 91  is a front elevation view of the cyclone bin assembly of  FIG. 89 ; 
         FIG. 92  is a rear elevation view of the cyclone bin assembly of  FIG. 89 ; 
         FIG. 93  is a side elevation view of the cyclone bin assembly of  FIG. 89 ; 
         FIG. 94  is a top plan view of the cyclone bin assembly of  FIG. 89 ; 
         FIG. 95  is a bottom plan view of the cyclone bin assembly of  FIG. 89 ; 
         FIG. 95 b    is a front perspective view of the cyclone bin assembly of  FIG. 89  with a bottom portion in an open position; 
         FIG. 95 c    is a front perspective view of the cyclone bin assembly of  FIG. 89  with top and bottom portions in open positions; 
         FIG. 96  is a cross-sectional view taken along line  96 - 96  in  FIG. 22 ; 
         FIG. 97 a    is a bottom perspective view of the handvac of the apparatus of  FIG. 1 ; 
         FIG. 97 b    is a partial cross-sectional view taken along line  97   b - 97   b  of  FIG. 97   a;    
         FIG. 98 a    is a bottom perspective view of the handvac of the apparatus of  FIG. 1  with an open door; 
         FIG. 98 b    a partial cross-sectional view taken along line  98   b - 98   b  of  FIG. 98   a;    
         FIG. 99  is a partial cross-sectional view of a surface cleaning apparatus having a handvac disconnected from the upright section, and a bypass valve in a first closed position; 
         FIG. 100  is a cross-sectional view of the surface cleaning apparatus of  FIG. 99  having a handvac connected to the upright section and the bypass valve in the first closed position; 
         FIG. 101  is a cross-sectional view of the surface cleaning apparatus of  FIG. 99  having the handvac connected to the upright section and a supplementary cyclone bin assembly, and the bypass valve in a second open position; 
         FIG. 102  is a cross-sectional view of a surface cleaning apparatus having a having a bypass airflow path and a pre-motor filter in a supplemental cyclone bin assembly; 
         FIG. 103  is a cross-sectional view of a surface cleaning apparatus having a clean air suction motor in a surface cleaning head; 
         FIG. 104 a    is a cross-sectional view of a surface cleaning apparatus having a having a clean air suction motor in a supplemental cyclone bin assembly; 
         FIG. 104 b    is a cross-sectional view of another surface cleaning apparatus having a clean air suction motor in a supplemental cyclone bin assembly; 
         FIG. 105 a    is a perspective view of a surface cleaning apparatus having a supplemental cyclone bin assembly disconnected from an upright section; 
         FIG. 105 b    is a perspective view of a surface cleaning apparatus having a cyclone chamber and dirt collection chamber disconnected from an upright section; 
         FIG. 106  is a side elevation view a surface cleaning apparatus in accordance with another embodiment; 
         FIG. 107  is a partial side elevation view of the apparatus of  FIG. 106  with a handvac disconnected from an upright section; 
         FIG. 108  is a side elevation view of the apparatus of  FIG. 106  in a reclined in-use position with an arm assembly in a first position; 
         FIG. 109  is a side elevation view of the apparatus of  FIG. 106  in a steeply reclined in-use position with the arm assembly in a second position; 
         FIG. 110 a    is a rear perspective view of the handvac of the apparatus of  FIG. 1  in an open position; 
         FIG. 110 b    is a front perspective view of the handvac of  FIG. 110 a    in the open position; 
         FIG. 111  is a front perspective view of the dirt collection chamber of the apparatus of  FIG. 1  in an open position; 
         FIG. 112  is a rear perspective view of the dirt collection chamber of  FIG. 111  in the open position; 
         FIG. 113  is a side elevation view of the dirt collection chamber of  FIG. 111  in the open position; 
         FIG. 114  is a front perspective view of the upright section of the apparatus of  FIG. 5  with a cyclone bin assembly in a closed position; 
         FIG. 115  is a front perspective view of the upright section of  FIG. 114  with the cyclone bin assembly in an open position; 
         FIG. 116  is a cross-sectional view of the handvac of the apparatus of  FIG. 1  having a pre-motor filter chamber in an open position; 
         FIG. 117  is a exploded view of the handvac of  FIG. 116 ; 
         FIG. 118  is a cross-sectional view of a surface cleaning apparatus having a plurality of cyclone chambers in parallel; 
         FIG. 119 a    is a cross-sectional view of a surface cleaning apparatus having a dirty air suction motor in a surface cleaning head in series with a clean air suction motor in a handvac; 
         FIG. 119 b    is a cross-sectional view of the surface cleaning apparatus of  FIG. 119 a    with a supplemental cyclone bin assembly removed; 
         FIG. 120  is a cross-sectional view of a surface cleaning apparatus having a clean air suction motor in a surface cleaning head in series with a clean air suction motor in a handvac; 
         FIG. 121 a    is a cross-sectional view of a surface cleaning apparatus having a clean air suction motor in a supplemental cyclone bin assembly in series with a clean air suction motor in a handvac; 
         FIG. 121 b    is a cross-sectional view of the surface cleaning apparatus of  FIG. 121 a    with a hose connecting the handvac suction motor and the suction motor of the supplemental cyclone bin assembly; 
         FIG. 122  is a cross-sectional view of a surface cleaning apparatus having an airflow which bypasses the handvac; 
         FIG. 123  is a perspective view of a surface cleaning apparatus in accordance with another embodiment; 
         FIG. 124  is an exploded perspective view of the surface cleaning apparatus of  FIG. 123 ; 
         FIG. 125  is a cross-sectional view taken along line  125 - 125  in  FIG. 123 ; 
         FIG. 126  is enlarged partial view of  FIG. 125 ; and 
         FIG. 127  is an enlarged partial view of  FIG. 126 . 
     
    
    
     DESCRIPTION OF VARIOUS EMBODIMENTS 
     Numerous embodiments are described in this application, and are presented for illustrative purposes only. The described embodiments are not intended to be limiting in any sense. The invention is widely applicable to numerous embodiments, as is readily apparent from the disclosure herein. Those skilled in the art will recognize that the present invention may be practiced with modification and alteration without departing from the teachings disclosed herein. Although particular features of the present invention may be described with reference to one or more particular embodiments or figures, it should be understood that such features are not limited to usage in the one or more particular embodiments or figures with reference to which they are described. 
     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 directly 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 Overview 
     Referring to  FIGS. 1-3 , a surface cleaning apparatus  100  is shown in accordance with a first embodiment. In the embodiment shown, the surface cleaning apparatus  100  is a type of upright vacuum cleaner which is referred to as a stick vacuum cleaner. As illustrated, surface cleaning apparatus  100  includes a surface cleaning head  104 , an upright section  108 , and a hand-carriable vacuum cleaner  112  (also referred to as handvac or hand vacuum cleaner  112 ). 
     Upright section  108  may be movably and drivingly connected to surface cleaning head  104 . For example, upright section  108  may be permanently or removably connected to surface cleaning head  104  and moveably mounted thereto for movement from a storage position to an in use position, such as by a pivotable joint  116 . Joint  116  may permit upright section  108  to pivot (i.e. rotate) with respect to surface cleaning head  104  about a horizontal axis. Accordingly, upright section  108  may be rotatable rearwardly so as to be positionable in a plurality of reclined floor cleaning positions (see for example  FIGS. 81 and 108 ). 
     Upright section  108  may also be steeringly connected to surface cleaning head  104  for maneuvering surface cleaning head  104 . For example, joint  116  may be a swivel joint. 
     Handvac  112  may be removably connected to upright section  108 . When mounted to upright section  108 , a user may grasp handvac  112  to manipulate upright section  108  to steer surface cleaning head  104  across a surface to be cleaned. Accordingly, when handvac  112  is mounted to upright section  108 , handle  484  is the drive handle of surface cleaning apparatus  100   
     Surface cleaning apparatus  100  has at least one dirty air inlet, one clean air outlet, and an airflow path extending between the inlet and the outlet. In the illustrated example, lower end  120  of surface cleaning head  104  includes a dirty air inlet  124 , and a rear end  128  of handvac  112  includes a clean air outlet  132 . An airflow path extends from dirty air inlet  124  through surface cleaning head  104 , upright section  108 , and handvac  112  to clean air outlet  132 . 
     As exemplified, at least one suction motor, and preferably the only suction motor, and one air treatment member, which may be the only air treatment member, is provided in the handvac  112  to permit handvac  112  to operate independently when disconnected from surface cleaning head  104  and optionally from upright section  108 . It will be appreciated that while at least one suction motor and at least one air treatment member are positioned in the airflow path to separate dirt and other debris from the airflow, that when used with other aspects disclosed herein, each of the suction motor and the air treatment member may be provided in the surface cleaning head  104 , the upright section  108 , and/or the handvac  112 . 
     The air treatment member may be any suitable air treatment member, including, for example, one or more cyclones, filters, and bags. Preferably, at least one air treatment member is provided upstream of the suction motor to clean the dirty air before the air passes through the suction motor. In the illustrated embodiment, handvac  112  includes a cyclone bin assembly  136  including a cyclone chamber and a dirt collection region. In some embodiments, the dirt collection region may be a portion (e.g., a lower portion) of the cyclone chamber. In other embodiments, the dirt collection region may be a dirt collection chamber that is separated from the cyclone chamber by a dirt outlet of the cyclone chamber. Plurality of Dirt Collection Chambers 
     In accordance with one aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a stick surface cleaning apparatus may have more than one dirt collection chamber. For example, the handvac may include a first dirt collection chamber, and the upright section may include a second dirt collection chamber. The second dirt collection chamber provides the surface cleaning apparatus with an enlarged dirt collection capacity in comparison with the dirt collection capacity of the handvac alone. Accordingly, the surface cleaning apparatus may operate for longer intervals before one or more of the dirt collection chambers needs to be emptied. 
     In accordance with this aspect, and as exemplified in  FIG. 4 , upright section  108  may have an auxiliary dirt collection assembly  140 , which may comprise or consist of an auxiliary dirt collection chamber  141 . For example, the auxiliary dirt collection chamber  140  may be the only component provided in the auxiliary dirt collection assembly and therefore the auxiliary dirt collection chamber  140  may be the auxiliary dirt collection assembly. Alternately, as disclosed in alternate embodiments, the auxiliary dirt collection assembly may also include one or more of a pre-motor filter, one or more cyclone chambers that may have one or more associated dirt collection chambers and a suction motor. 
     As illustrated, up flow duct  144  (also referred to as a wand if removable for use, e.g., in an above floor cleaning mode as exemplified in  FIGS. 33 and 44   a ) may define the airflow path between surface cleaning head  104  and handvac  112 . Auxiliary dirt collection chamber  140  may be a supplemental dirt collection chamber that is selectively mounted to up flow duct  144  and augments the dirt collection capacity of surface cleaning apparatus  100  when mounted to upper section  108 . 
     It will be appreciated that if up flow duct  144  is the member that supports handvac  112  when auxiliary dirt collection assembly  140  is removed, the up flow duct is designed to be load supporting and may be a rigid tube. Further if the up flow duct is removable to function as an above floor cleaning wand, then the up flow duct may also be a rigid tube. In other embodiments, e.g., the up flow duct is not a load supporting member, then all or a portion of up flow duct  144  may be flexible, such as a flexible hose. 
     As exemplified in  FIGS. 1 and 21 , the dirt collection assembly  140  of the upright section  108  may collect at least a portion of the dirt separated from the dirty airflow by the handvac  112 . Accordingly, the dirt collection assembly  140  of the upright section  108  may be in communication with the dirt collection chamber of handvac  112  all or a portion of the time when the handvac  112  is mounted to the upright section  108 . For example, the dirt collection chamber of handvac  112  may have a door that automatically opens when handvac  112  is mounted to the upright section  108 . Accordingly, dirt separated by handvac  112  may travel to the supplemental dirt collection assembly  140 . Alternately, the door may be manually operable by a user. Accordingly, dirt may only be transferred to the supplemental dirt collection assembly  140  when a user elects to open the door. Alternately, the supplemental dirt collection assembly  140  may receive dirt from an auxiliary air treatment member, in which case the auxiliary dirt collection assembly may comprise a housing having both the auxiliary air treatment member and the auxiliary dirt collection chamber. 
     The dirt collection chamber of auxiliary dirt collection assembly  140  and handvac dirt collection chamber  188  may be of any suitable volumetric sizes. Preferably, the volumetric storage capacity of the dirt collection chamber of auxiliary dirt collection assembly  140  is at least equal to the volumetric storage capacity of handvac dirt collection chamber  188 , and more preferably larger than the volumetric storage capacity of handvac dirt collection chamber  188 . For example, the volumetric storage capacity of the dirt collection chamber of auxiliary dirt collection assembly  140  may be 1-20 times the volumetric storage capacity of handvac dirt collection chamber  188 , more preferably 1.5-10 times, and most preferably 3-5 times. In alternative embodiments, the volumetric storage capacity of the dirt collection chamber of auxiliary dirt collection assembly  140  may be less than that of handvac dirt collection chamber  188 . 
     As exemplified in  FIG. 21 , handvac  112  may include a cyclone bin assembly  136  including one or more cyclone chambers  184  and one or more dirt collection chambers  188 . The cyclone chamber or chambers and the dirt collection chamber or chambers may be of any design. As exemplified, cyclone chamber  184  includes an air inlet  192  in fluid communication with wand  144 , an air outlet  196  downstream of air inlet  192 , and a dirt outlet  200  in fluid communication with dirt collection chamber  188 . Suction motor  204  or another suction source may draw dirty air to enter air inlet  192  and travel cyclonically across cyclone chamber  184  to dirt outlet  200  where dirt is ejected into dirt collection chamber  188 . Afterwards, the air is discharged from cyclone chamber  184  at air outlet  196 . 
     As exemplified in  FIGS. 21-23 , cyclone bin assembly  136  may include laterally opposed side walls  208 , a top wall  212 , a bottom wall  216 , a first end wall  220 , and a second end wall  224 . As shown, a common interior wall  226  may divide cyclone chamber  184  from dirt collection chamber  188 . For example, cyclone chamber  184  may be defined by top wall  212  and interior wall  226  which extend between end walls  220  and  224 . Top wall  212  and interior wall  226  may be curved to define a substantially cylindrical or frustroconical sidewall of cyclone chamber  184 . In alternative embodiments, cyclone chamber  184  may have a sidewall of any other suitable shape that is conducive to cyclonic flow. In some alternative embodiments, interior wall  226  of cyclone chamber  184  may be discrete from dirt collection chamber  188  instead of forming a common wall dividing cyclone chamber  184  from dirt collection chamber  188 . 
     Dirt collection chamber  188  may be defined by bottom wall  216 , side walls  208 , and interior wall  226 . In some embodiments, bottom wall  216  may be openable for fluidly connecting handvac dirt collection chamber  188  to supplemental dirt collection assembly  140  of upright section  108 . This may permit dirt separated by cyclone chamber  184  and discharged through dirt outlet  200  to move through opened bottom wall  216  and collect in supplemental dirt collection assembly  140 . 
     Optionally, when the auxiliary dirt collection assembly is mounted to upright section  108 , dirt separated in the cyclone chamber is collectable in the dirt collection chamber of the auxiliary dirt collection assembly. The auxiliary dirt collection assembly may be selectively connectable in communication with the dirt collection region of the hand vacuum cleaner by, e.g., an openable door  228  (also referred to as a dumping door). The door may be manually openable, such as by a handle, or automatically operated, such as when the auxiliary dirt collection assembly is mounted to upright section  108 . In this case, dirt will collect in the handvac  112  and will remain there until door  228  is openable so as to allow the collected dirt to transfer to supplemental dirt collection assembly  140 . In the latter case, supplemental dirt collection assembly  140  is automatically connected in communication with a dirt outlet of the cyclone chamber when the auxiliary dirt collection assembly is mounted to upright section  108 . In this case, dirt will collect in the supplemental dirt collection assembly  140  when handvac  112  is mounted to the upright section  108 . 
     In the illustrated example, bottom wall  216  includes a door  228 , which may be a pivotally openable door  228 . As shown, door  228  may be pivotally connected to dirt collection chamber  188  by a hinge  232  for rotation about a hinge axis  236 . Door  228  may extend forwardly from a rear end  240  to a front end  244 . Preferably, hinge  232  and hinge axis  236  are positioned at rear end  240  of door  228 . In alternative embodiments, hinge  232  and hinge axis  236  may be positioned at front end  244  or intermediate front and rear ends  240  and  244 . 
     Door  228  is preferably outwardly pivotal of dirt collection chamber  188 . For example, door  228  may be movable between a closed position ( FIG. 22 ) in which door  228  closes bottom wall  216 , and an open position ( FIG. 21 ) in which door  228  is rotated away from dirt collection chamber  188  for opening bottom wall  216  to permit dirt to move from handvac dirt collection chamber  188  to supplemental dirt collection assembly  140 . As shown, in the open position front end  244  of door  228  may be moved away from handvac dirt collection chamber  188 . 
     Hinge axis  236  may have any suitable orientation. In the illustrated example, hinge axis  236  extends laterally side-to-side of surface cleaning apparatus  100 . Hinge axis  236  may be transverse to one or more of cyclone axis  248  of cyclone chamber  184 , motor axis  252  of suction motor  204 , or downstream direction  256  through air inlet  192 . In the example shown, hinge axis  236  is perpendicular to cyclone axis  248 , motor axis  252 , and downstream direction  256 . In alternative embodiments, hinge axis  236  may be substantially parallel to one or more of cyclone axis  248 , motor axis  252 , or downstream direction  256 . 
     In some embodiments, door  228  may extend upwardly and forwardly between rear end  240  and front end  244 . For example, front end  244  may be positioned closer to cyclone chamber  184  and cyclone axis  248  than rear end  240 . When door  228  is opened ( FIG. 21 ), this may provide a bottom opening  260  having a transverse width  264  between cyclone chamber  184  and bottom wall  216 . 
     Optionally, the dirt collection region (the dirt collection chamber) of the hand vacuum cleaner is positioned above the supplemental dirt collection assembly  140 . Accordingly, dirt that is received in the dirt collection chamber of the hand vacuum cleaner may be transferred by due to gravity to the supplemental dirt collection assembly  140 . Accordingly, for example, dirt outlet  200  may be positioned on a bottom end  268  of cyclone chamber  184  for discharging dirt toward bottom wall  216  and opening  260  to be delivered by gravity into supplemental dirt collection assembly  140  of upright section  108 . 
     Reference is now made to  FIGS. 21, 22, and 24 . Preferably, when handvac  112  is connected to upright section  108 , opening  260  is fluidly coupled to an inlet to dirt collection assembly  140 . In the illustrated example, door  228  and opening  260  of cyclone bin assembly  136  align with an inlet  272  of dirt collection assembly  140 . As shown, inlet  272  may be formed as an opening in an upper portion  276  of dirt collection assembly  140 . In some embodiments, inlet  272  may include a door (not shown) which opens automatically and concurrently with door  228 . Optionally, the door of inlet  272  may be biased (e.g. by a spring) to close inlet  272  and seal dirt collection assembly  140  when door  228  is closed or handvac  112  is disconnected from upright section  108 . 
     Preferably, opening  260  and inlet  272  of upper portion  276  of dirt collection assembly  140  are sized and positioned to receive at least a portion of door  228  when door  228  is in the open position. This may permit door  228  to open outwardly into the open position as shown in  FIG. 21 . 
     If door  228  is moveable from the closed position to the open position automatically upon connecting handvac  112  to upright section  108 , then handvac  112  may include an actuator drivingly connected to door  228  to move door  228  (e.g., pivot door  228  about hinge axis  236 ) to the open position when handvac  112  is connected to upright section  108 . In the illustrated embodiment, door  228  includes an arm  280  pivotally connected at hinge  232 . As shown, arm  280  may include a lever portion  284  which extends rearwardly of hinge  232 , and which may be depressed to pivot door  228  to the open position. Further, dirt collection assembly  140  is shown including an engaging member  288  positioned to align with lever portion  284  of arm  280 . In use, engaging member  288  may depress lever portion  284  of arm  280  upon connecting handvac  112  to upright section  108  to automatically pivot door  228  into the open position, whereby opening  260  may be fluidly connected to inlet  272  of supplemental dirt collection assembly  140 . In one aspect, this may permit a user, who has used handvac  112  when disconnected from upright section  108 , to automatically empty handvac dirt collection chamber  188  by connecting handvac  112  to upright section  108 . Afterwards, handvac  112  may be disconnected from upright section  108  with an empty dirt collection chamber  188 . 
     If door  228  is manually moveable from the closed position to the open position then, as exemplified in  FIGS. 97 a - b  and 98 a - b   , door  228  may be provided with an actuator, e.g., a manually operable lever portion  284 . Lever portion  284  may extend downwardly from door  228  such that lever portion  284  is user-accessible and user-operable while handvac  112  is mounted to upright section  108 . As exemplified, lever portion  284  may protrude from the bottom wall  216  of cyclone bin assembly  136  to provide user-accessibility to lever portion  284 . 
     As exemplified in  FIGS. 21, 22, 24, 97   a - b , and  98   a - b , whether door  228  is manually or automatically operable, door  228  may be biased to the closed position. For example, door  228  may be biased for rotation about hinge axis  236  toward the closed position by a biasing member (not shown), such as a torsion spring. This may permit door  228  to close automatically upon disconnecting handvac  112  from upright section  108 , to prevent dirt from spilling from dirt collection chamber  188  and to permit immediate use of handvac  112  for cleaning. In alternative embodiments, door  228  may not be biased toward the closed position. For example, door  228  may remain in the open position upon disconnecting handvac  112  from upright section  108 . In such a case, door  228  may remain open until manually closed. For example, referring to  FIGS. 98 a - b   , door  228  may remain in the open position shown until lever portion  284  of arm  280  is user-activated to move door  228  to the closed position. 
     Removable Supplemental Dirt Collection Assembly 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a surface cleaning apparatus has two or more dirt collection chambers wherein one of the dirt collection chambers is optionally removable, and the surface cleaning apparatus is operable when the removable dirt collection chamber has been removed. Accordingly, as discussed with respect to the previous embodiment, a supplemental dirt collection chamber may be provided on the up flow duct or wand of a stick vacuum cleaner and may be the main dirt collection chamber (e.g., it may collect most or all of the separated dirt when the stick vacuum cleaner is operated with the supplemental dirt collection chamber in position). This may be referred to as a large dirt capacity upright mode or a second upright mode of operation. 
     The supplemental dirt collection chamber may be removable for emptying and to reconfigure the vacuum to a light weight upright mode or a first upright mode of operation. Once removed, the vacuum cleaner may be operable to separate dirt and collect the separated dirt in another dirt collection chamber (e.g. the handvac dirt collection chamber). An advantage of the light weight upright mode is that the size and weight of the vacuum cleaner may be reduced by removal of the supplemental dirt collection chamber. This may be of assistance when the vacuum cleaner is used to clean around and under furniture, and when the vacuum cleaner is to be carried upstairs. 
     As exemplified in  FIGS. 1 and 4 , dirt collection assembly  140  of upright section  108  may be removably connected to wand  144  and handvac  112 . This may permit dirt collection assembly  140  to be removed for emptying, or to operate apparatus  100  in a light weight upright mode. It will be appreciated that, in alternate embodiments, wand  144  and dirt collection assembly  140  of upright section  108  may be integrally formed or permanently connected as a one piece assembly. 
     Dirt collection assembly  140  may be removably mounted to wand  144  in any suitable fashion. In the illustrated embodiment, a lower end  292  of dirt collection assembly  140  may be toed onto a lower end  296  of wand  144 , and then dirt collection assembly  140  may be pivoted about lower end  292  toward wand  144  and held in position by a suitable releasable fastening mechanism. 
     In the illustrated embodiment, handvac  112  may remain in fluid communication with wand  144  and surface cleaning head  104  while supplemental dirt collection assembly  140  is disconnected from wand  144  and removed altogether from apparatus  100 . This may permit dirt collection assembly  140  to be removed (e.g., for emptying or to operate apparatus  100  in a light weight upright mode) without disrupting the operation of apparatus  100 . 
     Upstream Air Treatment Member 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, an upstream air treatment member may be provided. The upstream air treatment member may be removably connectable upstream of the handvac. For example, the supplemental dirt collection assembly may have one or more cyclone chambers associated therewith. Accordingly, when the supplemental dirt collection assembly is positioned on upright section  108  (e.g., up flow duct  144 ), a supplemental cyclone chamber assembly  160  may be connected in series or parallel with the cyclone chamber of the handvac. Accordingly, when operated as an upright vacuum, the surface cleaning apparatus may be a dual cyclonic stage surface cleaning apparatus. When used in an above floor cleaning mode, the handvac may be a single cyclonic stage surface cleaning apparatus. Typically, the surface cleaning apparatus may be used as an upright vacuum cleaner (i.e., with the supplemental cyclonic bin assembly attached) for cleaning floors. This may represent the majority of area that is to be cleaned. Therefore, for a majority of the use of the surface cleaning apparatus, it may be used as a dual stage cyclonic surface cleaning apparatus. 
     In accordance with this aspect, the upright section may include a first air treatment member for separating at least large dirt particles from the airflow, and the air treatment member of the handvac may be positioned downstream of the first air treatment member for separating small dirt particles (“fines”) from the airflow. In this case, the greatest volume of separated dirt may be collected in the dirt collection chamber of the upright section, and a lesser volume of fines may be collected in the dirt collection chamber of the handvac. This may reduce the rate at which the handvac dirt collection chamber may be filled, and reduce the frequency at which the handvac dirt collection chamber must be emptied. It will be appreciated that each cyclonic stage may be of any design and may be designed to remove any type of dirt. 
     It will be appreciated that, in some embodiments, dirt separated by the handvac may be collected in the supplemental dirt collection assembly. In such a case, the dirt collection region of the handvac may be in communication (automatically or manually selectively) with a dirt collection region in the supplemental dirt collection assembly, which region may be isolated from the dirt collection chamber for the cyclonic stage of the supplemental cyclone chamber assembly. 
     It will be appreciated that, if air travels through up flow duct  144  to handvac  112 , when cyclone bin assembly  160  is connected to wand  144 , air travelling through wand  144  may be diverted into cyclone bin assembly  160  and returned to wand  144  from cyclone bin assembly  160  downstream of the diversion. Optionally, in accordance with another aspect with is discussed in more detail subsequently, and which is exemplified in the embodiment of  FIGS. 20 and 26 , in some embodiments the diversion may occur automatically upon mounting of the supplemental cyclone bin assembly  160  to upright section  108 . For example, cyclone bin assembly  160  may include a diversion member  428  which may be positionable in the conduit of wand  144  between the upstream and downstream ends  364  and  360  of wand  144 . As shown, diversion member  428  may divide wand  144  into an upstream wand portion  440  and a downstream wand portion  444 . Diversion member  428  may form an air-tight seal inside wand  144  for redirecting substantially all air travelling through upstream wand portion  440  into air inlet  316  of cyclone bin assembly  160 . In turn, air outlet  320  of cyclone bin assembly  160  may discharge into downstream wand portion  444  for travel downstream to handvac  112 . 
     As exemplified in the embodiment of  FIGS. 5, 12, and 25  supplemental cyclone bin assembly  160 ,  160  may be any suitable cyclone bin assembly and may include a cyclone chamber  308  and a dirt collection chamber  141 . Cyclone chamber  308  may include an air inlet  316  for receiving dirty air from the surface cleaning head, e.g., via wand  144 , an air outlet  320  for discharging air, e.g., to handvac  112 , a dirt outlet  324  for discharging separated dirt into dirt collection chamber  141 , a vortex finder  400  and a cyclone axis  392 . Wand  144  may include an upstream end  360  connected to surface cleaning head  104 , and a downstream end  364  connected to air inlet  316  of cyclone chamber  308 . 
     From cyclone bin assembly  160 , the airflow may flow downstream to handvac  112 . Accordingly, handvac cyclone bin assembly  136  is positioned downstream of and in series with supplemental cyclone bin assembly  160 . The air may be received in handvac cyclone bin assembly  136  where additional particulate matter may be further separated from the airflow and deposited into dirt collection chamber  188 . In many cases, the additional particulate matter separated by cyclone bin assembly  136  may constitute less than 30% of the total volume of dirt separated from apparatus  100 , and may constitute all or a majority of the fines that are separated. Accordingly, dirt collection chamber  188  may be filled at a lower volumetric rate than supplemental dirt collection chamber  141 . This may help to maintain dirt collection capacity in handvac  112 . 
     In operation, air exiting air outlet  320  of cyclone bin assembly  160  may enter handvac  112  for a second stage of cleaning by cyclone bin assembly  136 . As illustrated, handvac  112  may include a nozzle  412  having an upstream end  416  and a downstream end  420 . When handvac  112  is connected to upright section  108 , upstream end  416  may be fluidly connected with air outlet  320  of upright section  108 , and downstream end  420  may be fluidly connected with inlet  192  of handvac cyclone chamber  184 . 
     In operation, air may be drawn into dirty air inlet  124  and enter upstream wand portion  440 . Diversion member  428  may redirect the air traveling through upstream wand portion  440  to enter air inlet  316  of cyclone chamber  308 . Air may travel through air inlet  316  tangentially to sidewall  376  and spiral downwardly toward lower end wall  368 , whereby dirt may be separated from the airflow and pass through dirt outlet  324  to accumulate in dirt collection chamber  141 . The airflow may then travel downstream into vortex finder  400  and exit cyclone chamber  308  at air outlet  320  at downstream end  404  of vortex finder  400 , into an outlet passage  476 . Outlet passage  476  may have a downstream end fluidly connected to downstream wand portion  444 . The air may travel through downstream wand portion  444  to downstream wand end  364  into handvac  112 . In handvac  112 , additional dirt may be separated from the airflow by cyclone bin assembly  136  before the air is discharged through clean air outlet  132 . 
     It will be appreciated that, in accordance with this aspect, cyclone bin assembly  160  may be any suitable cyclone bin assembly. In the example shown in  FIGS. 5, 12, and 25 , cyclone chamber  308  includes a lower end wall  368 , an upper end wall  372 , and a sidewall  376  extending between the lower end wall  368  and the upper end wall  372 . Preferably, sidewall  376  is substantially cylindrical or frustroconical in accordance with conventional cyclone chamber design. 
     Dirt outlet  324  may be formed as an opening in sidewall  376  for directing separated dirt into dirt collection chamber  141 . In some embodiments, at least a portion of sidewall  376  of cyclone chamber  308  may form a common dividing wall between cyclone chamber  308  and dirt collection chamber  141 . In this case, dirt outlet  324  may be formed as an opening in the common portion of sidewall  376 . 
     Dirt outlet  324  may be formed at any suitable position on sidewall  376 . In the illustrated example, dirt outlet  324  is positioned at an upper end of cyclone chamber  308  proximate upper end wall  372 . More particularly, the illustrated embodiment includes a dirt outlet  324  defined by a slot  380  in sidewall  376  bordered by upper end wall  372 . This may increase the capacity of dirt collection chamber  141 . More specifically, dirt may accumulate by gravity from the bottom of dirt collection chamber  141  upwardly. Thus, the capacity of the dirt collection chamber  141  may be defined at least in part by the position of dirt outlet  324 . Dirt collection chamber  141  is full when the level of dirt in dirt collection chamber  141  rises to dirt outlet  324 . Accordingly, the capacity of dirt collection chamber  141  is the volume of the dirt collection chamber  141  below dirt outlet  324 . Thus, the capacity of dirt collection chamber  141  may be increased by positioning dirt outlet  324  in an uppermost position, such as proximate the upper end wall  372  of cyclone chamber  308  as shown. 
     Alternately, in some embodiments as exemplified in  FIG. 26 , lower end wall  368  may comprise or be an arrester plate  1280  which separates cyclone chamber  308  from dirt collection chamber  141 . In this case, dirt outlet  324  may be formed by a gap between arrester plate  1280  and sidewall  376 , where dirt particles may fall by gravity into dirt collection chamber  141 . 
     In accordance with another aspect which is discussed in more detail subsequently, as exemplified, cyclone chamber  308  may include an inlet passage  384  for redirecting axially-directed inlet air to flow tangentially to promote cyclonic action in cyclone chamber  308 . An upstream end  388  of inlet passage  384  may face axially (i.e. substantially parallel to cyclone axis  392 ), and a downstream end (not shown) of inlet passage  384  may face tangentially to cyclone chamber  308 . Air entering upstream end  388  of inlet passage  384  from air inlet  316  may travel along inlet passage  384  and exit downstream end (not shown) in a tangential direction. After spiraling upwardly around vortex finder  400  of cyclone chamber  308 , the airflow may enter vortex finder  400  and exit cyclone chamber  308  through air outlet  320  at a downstream end  404  of vortex finder  400 . 
     Handvac cyclone chamber  184  may be any suitable cyclone chamber. In some embodiments, cyclone chamber  184  is substantially similar to cyclone chamber  308 . For example, cyclone chamber  184  may include an air inlet  192 , an inlet passage  420 , a dirt outlet  200 , a vortex finder  424 , a dirt outlet  200 , an air outlet  196 , and a cyclone axis  248 . Air from upright section  108  may axially enter air inlet  192 , be redirected to a tangential direction by inlet passage  420 , spiral upwardly around vortex finder  424 , deposit dirt into dirt outlet  200 , and then exit cyclone chamber  184  through air outlet  196  at a downstream end of vortex finder  424 . 
     Modes of Operation 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the surface cleaning apparatus is reconfigurable to operate in a plurality of different modes of operation. For example, the surface cleaning apparatus may be operable in two or more of a handvac mode, a stair-cleaning mode, an above-floor cleaning mode, a large dirt capacity upright mode, a lightweight upright mode, or a dual motor upright mode. In some cases, the surface cleaning apparatus may be reconfigurable between different modes of operation with a single act of connection or disconnection. This may permit the surface cleaning apparatus to be quickly reconfigured with minimal interruption. 
     Referring to  FIGS. 1, 5, and 13 , surface cleaning apparatus  100 ,  152 , and  168  are shown in a large dirt capacity upright cleaning mode. In the large dirt capacity upright cleaning mode, surface cleaning apparatus  100 ,  152 , and  168  may include surface cleaning head  104 , upright section  108  including wand  144  and supplemental dirt collection assembly  140 , and handvac  112 . The airflow path may extend from dirty air inlet  124  of surface cleaning head  104  downstream through wand  144  and then cyclone bin assembly  136  of handvac  112  to separate dirt from the airflow and deposit that dirt into dirt collection chamber  141  of upright section  108  and/or handvac dirt collection chamber  188 . In apparatus  152  and  168 , cyclone bin assembly  160  is also positioned in the airflow path for separating and collecting dirt from the airflow and cyclone bin assembly  136  of handvac  112  may optionally be bypassed as discussed subsequently. 
     As exemplified in  FIGS. 12 and 12   a  one or more of the surface cleaning head  104 , upright section  108 , and handvac  112  may be removably connected to each other so as to be able to be assembled in a number of different combinations to provide apparatus  152  with a number of different modes of operation. In some embodiments, the wand  144  and supplemental assembly  140 ,  160  of upright section  108  may also be removably connected to each other to provide additional modes of operation. For example, in the large dirt capacity upright cleaning mode, surface cleaning head  104  may be connected to upstream end  360  of wand  144 , downstream end  364  of wand  144  may be connected to an air inlet  316  of cyclone bin assembly  160 , and air outlet  320  of cyclone bin assembly  160  may connected to upstream end  416  of handvac nozzle  412 . 
     The large dirt capacity upright cleaning mode as shown may be particularly effective for cleaning large surface areas (e.g. the floor of one or more rooms). The user may grasp handvac handle  484  to steer surface cleaning head  104  across the surface to be cleaned (i.e. handle  484  may be a drive handle of the surface cleaning apparatus). The tall height  492  of apparatus  100 ,  152 , and  168  provided in part by the interposition of wand  144  between surface cleaning head  104  and handvac  112  may permit apparatus  100  to be operated by a user standing upright. The large dirt capacity of dirt collection chamber  141  of upright section  108  may permit extended usage of apparatus  100  before the dirt collection chamber  141  becomes full and must be emptied. 
     As exemplified in  FIGS. 4, 5, 12, 12   a ,  20  and  27 - 30 , and  37 - 44  dirt collection assembly  140  or cyclone bin assembly  160  may be selectively disconnected from upright section  108  to reconfigure apparatus  100 ,  152 , or  168  from the large dirt capacity upright mode to a light weight upright mode. Likewise, dirt collection assembly  140  or cyclone bin assembly  160  may be selectively reconnected to upright section  108  to reconfigure apparatus  100 ,  152 , or  168  from a light weight mode to a large dirt capacity upright mode. 
     Preferably, reconfiguring the apparatus from the large dirt capacity upright mode to the light weight upright mode may require only a single user action (e.g., disconnecting the dirt collection assembly  140  or cyclone bin assembly  160  from the upright section  108  may automatically close a dumping door of the handvac if the dumping door is open and may also automatically close a diversion member if the vacuum cleaner includes a supplemental cyclone bin assembly  160 ). 
     As exemplified in apparatus  100 , door  228  which may have been open in the large dirt capacity upright mode for connecting dirt collection chambers  188  and  141 , may close automatically (i.e. without any further user interaction) upon disconnecting dirt collection chamber  141 , to seal bottom wall  216  of dirt collection chamber  141 . Exemplary mechanisms include a biasing member, such as a spring and a mechanical or electrical drive member drivingly connected to the door to close the door as supplemental assembly  140 ,  160  is removed. 
     As exemplified in apparatus  168 , disconnecting cyclone bin assembly  160  from wand  144  may automatically reroute the airflow path to extend directly from upstream wand end  360  to downstream wand end  364  without the intermediary diversion to cyclone bin assembly  160 . Therefore, the airflow path between surface cleaning head  104  and handvac  112  is automatically reconfigured by disconnection of cyclone bin assembly  160  to reconfigure apparatus  168  to the light weight upright mode. Accordingly apparatus  168  may be continually operated while being reconfigured. 
     In alternative embodiments, door  228  of apparatus  100  may be manually closed as another step before, during or after dirt collection assembly  140  is disconnected from upright section  108  to complete the reconfiguration to the light weight upright mode. For example, a user may manually close the door. In other embodiments, as described in more detail below, a diversion valve of apparatus  168  may require manual closure as another step after cyclone bin assembly  160  is disconnected from wand  144  to complete the reconfiguration to the light weight upright mode. Alternately, a single actuator may be manually operated to close the door and the diversion valve. 
     As exemplified in  FIG. 4 , apparatus  152  may be reconfigurable from the large dirt capacity upright mode to a light weight upright mode by disconnecting assembly  140 ,  160  from wand  144 . In some cases, it may be desirable to momentarily reconfigure an apparatus to the lightweight upright mode to complete a task (e.g. clean under an article of furniture), and afterward reconfigure the apparatus to the large dirt capacity upright mode. In the illustrated example, the airflow path between surface cleaning head  104  and handvac  112  persists during and after reconfiguration of apparatus  100  from the large dirt capacity upright mode to the lightweight upright mode. This may permit apparatus  100 , to be operated continuously (i.e. air to continue to travel between inlet  124  and outlet  132 ) before, during, and after reconfiguration to the lightweight upright mode. In turn, this may allow for a quick reconfiguration with little or no disruption. It will be appreciated that if a cyclone is provided in the supplemental assembly (e.g., assembly  160 ), there may be a short period during which the diversion valve is not closed during the transition. 
     In some cases, reconfiguring apparatus  100 ,  152 , or  168  from the large dirt capacity upright mode to the lightweight upright mode may provide a reduction in weight (i.e. by the removal of dirt collection assembly  140  or cyclone bin assembly  160 ), and a more slender profile. Thus, the lightweight upright mode may make apparatus  100 ,  152 , or  168  easier to lift (e.g. carry upstairs), and easier to maneuver under and around furniture and the like. However, in this mode, all of the dirt separated by cyclone bin assembly  136  in the lightweight upright mode is collected in dirt collection chamber  188 . Thus, apparatus  100 ,  152 , or  168  may have less dirt collection capacity in the lightweight upright mode as compared with the large dirt capacity upright mode. 
     Referring now to  FIGS. 31-33, 44   a , and  44   b , apparatus  100  and  168  are shown in an above-floor cleaning mode. As illustrated, apparatus  100  and  168  in the above-floor cleaning mode include handvac  112  and wand  144 . Apparatus  100 ,  152 , and  168  may be reconfigured from the lightweight upright mode to the above-floor cleaning mode by disconnecting surface cleaning head  104  from wand  144 . It will be appreciated that assembly  140 , 160  may be retained in an above floor cleaning mode if desired. However, this would add extra weight to the apparatus in the above floor cleaning mode. 
     Referring to  FIG. 36 a   , apparatus  152  is shown in another above-floor cleaning mode. As shown, apparatus  152  in an above-floor cleaning mode may include handvac  112  and an accessory wand  145 . Accessory wand  145  may be provided supplementary to wand  144  of upright section  108 . For example, accessory wand  145  may be removably mountable to a sidewall of upright section  108 , as shown in  FIG. 5 . Still referring to  FIG. 36 a   , in the above-floor cleaning mode shown, upstream end  360  may provide the dirty air inlet, and downstream end  364  may be removably fluidly connected to handvac nozzle  412 . Accessory wand  145  may have any suitable length  516 . For example, wand  144  may have a length sufficient to permit apparatus  100  to be used as an upright vacuum cleaner in the configuration of  FIG. 5 . Accordingly, wand  144  may be 2-4 feet long. In contrast, accessory wand  145  may be shorter than wand  144  (e.g., a user wants to be closer to the area to be cleaned in an above floor cleaning mode) and accordingly accessory wand  145  may be 6-18 inches. 
     In the above-floor cleaning mode, the upstream end  496  of wand  144  may provide the dirty air inlet of apparatus  100 ,  152 , or  168 . The above-floor cleaning mode may be well suited to cleaning surfaces above the floor, or more generally surfaces that are not substantially horizontal, and for cleaning in crevices which surface cleaning head  104  might be unable to access. The wand  144  may provide extended reach for distant cleaning surfaces (e.g. curtains, and ceilings). An auxiliary cleaning tool such as a crevice tool, brush or the like may be attached to the inlet end of the wand. 
     Preferably, apparatus  100 ,  152 , or  168  may be reconfigured from the lightweight upright mode to the above-floor cleaning mode by a single user action—disconnection of surface cleaning head  104  from the upstream end  496  of wand  144 . This may permit the apparatus to be quickly reconfigured with little or no disruption. For example, the apparatus may operate continuously before, during, and after reconfiguration from the lightweight upright mode to the above-floor cleaning mode. This may permit a user to conveniently reconfigure the apparatus to the above-floor cleaning mode to clean a surface inaccessible in the lightweight upright mode, and afterward reconfigure the apparatus to the lightweight upright mode to continue cleaning, e.g. the floor. 
     In some embodiments, the above-floor cleaning mode may further include dirt collection assembly  140 . For example, a user may reconfigure apparatus  100 ,  152 , or  168  from the large dirt capacity upright mode ( FIGS. 1, 5, and 13 ) to the above-floor cleaning mode by disconnecting surface cleaning head  104  from wand  144 , while maintaining dirt collection assembly  140  in place on wand  144 . An above-floor cleaning mode of this configuration may provide apparatus  100  with the reach of the above-floor cleaning mode, and the storage capacity of the large dirt capacity upright mode. In some embodiments, dirt collection assembly  140  may be a one piece assembly with the wand  144  (i.e. irremovably connected to wand  144 ), in which case the wand  144  may be an up flow duct. 
     Referring to  FIG. 22 , apparatus  100 ,  152 , and  168  may be reconfigured to a handvac mode from any other mode of operation by disconnecting handvac  112  (e.g. from wand  144 ). As illustrated, the handvac mode may include handvac  112  alone. In the handvac mode, upstream end  416  of nozzle  412  may provide the dirty air inlet. Optionally, one or more accessories (not shown), such as a brush, crevice tool, auxiliary wand  145  may be connected to nozzle  412 . If a wand  144  is part of dirt collection assembly  140  then an accessory wand  145  may be provided which is connectable to nozzle  412 . 
     The handvac mode of apparatus  100  may be lighter, smaller, and more agile than the other modes of operation. However, the handvac mode may have a smaller dirt collection capacity than the large dirt capacity upright mode ( FIGS. 1, 5 , and  13 ) for example. 
     In some cases, a user may wish to momentarily disconnect handvac  112  for use in the handvac mode (e.g. to clean a surface that is more accessible in the handvac mode), and then return the apparatus to the previous mode. For example, apparatus  100 ,  152 , or  168  may be momentarily reconfigured from the large dirt capacity upright mode ( FIGS. 1, 5, and 13 ) or from the lightweight upright mode ( FIGS. 27 and 37 ) to the handvac mode be merely removing the handvac and afterward reconfigured again to the upright mode. 
     It may be beneficial for the dirt collection chamber  188  of handvac  112  to have capacity available for use in the handvac mode upon disconnecting handvac  112  from upright section  108 . Further, it may be beneficial for dirt collection chamber  188  of handvac  112  to reclaim capacity after reconnecting handvac  112  to upright section  108 . This may be achieved by having dirt collection chamber  188  empty into assembly  140 ,  160  continually while handvac  112  is attached to the assembly, manually before removal of the handvac or upon removal of the handvac. The dirt capacity may be reclaimed by having dirt collection chamber  188  empty into assembly  140 ,  160  upon replacing handvac  112  to the assembly (either manually or automatically upon replacement). 
     An example of such a reconfiguration is discussed with respect to the embodiment of  FIG. 21 , In the illustrated example, handvac dirt collection chamber  188  has a bottom wall  216  that remains open to dirt collection assembly  140  while the handvac is attached to permit dirt from handvac dirt collection chamber  188  to transfer (e.g., by gravity) to dirt collection chamber  141  thereby preventing dirt collection chamber  188  from being filled while the apparatus is used in one of the upright operating modes. 
     Apparatus  100  may be reconfigured from the handvac mode to the large dirt capacity upright mode by reconnecting handvac  112  to upright section  108 . Preferably, reconnecting handvac  112  to upright section  108  automatically opens handvac dirt collection chamber  188  to dirt collection chamber  141  for transferring at least a portion of the dirt, collected while in the handvac mode, to dirt collection chamber  141  thereby emptying dirt collection chamber  188  so that dirt collection chamber  188  is not full when the handvac is once again used in the handvac mode. 
     In some embodiments, handvac dirt collection chamber  188  does not empty into assembly  140 ,  160  when attached to the assembly, manually or automatically. For example,  FIGS. 25 and 26  show exemplary embodiments of apparatus  152  and  168  where assemblies  160  and  188  receive and store dirt separately at all times. As shown, upright dirt collection chamber  141  may receive and collect dirt separated by auxiliary cyclone bin assembly  160 , and handvac dirt collection chamber  188  may separately receive and collect dirt separated by handvac cyclone bin assembly  136 . 
     Turning now to  FIGS. 123-126 , apparatus  152  is shown in accordance with another embodiment. As exemplified, handvac cyclone bin assembly  136  may include a plurality of cyclonic cleaning stages arranged in series. For example, and referring to  FIGS. 125 and 126 , cyclone bin assembly  136  may include a first cyclonic cleaning stage  640  arranged in series upstream from a second cyclonic cleaning stage  644 . First cyclonic cleaning stage  640  may include one or more air outlet(s)  196   a  which discharge into air inlet(s)  192   b  of second cyclonic cleaning stage  644 . 
     Referring now to  FIG. 127 , each cyclonic cleaning stage  640  and  644  may include one or more cyclone chambers  184  in parallel. For example, cyclonic cleaning stages  640  and  644  may each include one cyclone chamber  184 , or may each include a plurality of cyclone chambers  184 . Alternatively, one of cyclonic cleaning stages  640  and  644  may include one cyclone chamber  184  and the other stage may include a plurality of cyclone chambers  184 . In the illustrated example, first cyclonic cleaning stage  640  includes one cyclone chamber  184   a , and second cyclonic cleaning stage  644  includes a plurality of cyclone chambers  184   b  arranged in parallel. For example, second cyclonic cleaning stage  644  may include four or more cyclone chambers  184   b  arranged in parallel. 
     Second stage cyclone chamber(s)  184   b  may have any suitable orientation relative to first stage cyclone chamber(s)  184   a . For example, each of second stage cyclone chamber(s)  184   b  may have an air inlet  192   b  and an air outlet  196   b  both positioned proximate a rear end  648  of the second cyclonic cleaning stage  644  (rearward with respect to the inlet of the handvac), or both positioned proximate a front end  652  of the second cyclonic cleaning stage  644 . Alternatively, each of second stage cyclone chamber(s)  184   b  may have an air inlet  192  positioned proximate one of the front and rear ends  648  and  652 , and an air outlet  196   b  positioned proximate the other of the front and rear ends  648  and  652 . In the illustrated example, second stage cyclone chambers  184   b  are shown including air inlets  192   b  at front end  648  and air outlets at rear end  652 . This may reduce directional changes in the airflow which may reduce backpressure developed through second stage cyclone chambers  184   b  for enhanced airflow efficiency. As shown, axes  248   b  of second stage cyclone chamber  184   b  may be parallel to axis  248   a  of first stage cyclone chamber  184   a.    
     Handvac cyclone bin assembly  136  may include one or more dirt collection regions  188 . For example, cyclone chambers  184  of first and second cyclonic cleaning stages  640  and  644  may separate dirt into one common dirt collection region  188 , or each cyclonic cleaning stage  640  and  644  may include a separate dirt collection region  188 . In the latter case, all first stage cyclone chamber(s)  184   a  may discharge dirt into the first stage dirt collection region  188   a , and all second stage cyclone chamber(s)  184   b  may discharge dirt into the second stage dirt collection region  188   b . In the illustrated embodiment, handvac cyclone bin assembly  136  includes one first stage dirt collection region  188   a , and a plurality of second stage dirt collection regions  188   b , where each second sage dirt collection region  188   b  receives dirt discharged by a respective second stage cyclone chamber  184   b.    
     Reference is now made to  FIGS. 34-36 , which show apparatus  100 ,  152 , or  168  in a stair-cleaning mode of operation. As shown, apparatus  100 ,  152 , or  168  in stair-cleaning mode may include handvac  112  directly connected to surface cleaning head  104 . For example, nozzle  412  may be connected to pivot joint  116  of surface cleaning head  104 . 
     The stair-cleaning mode of operation may be especially suitable for cleaning stairs and the like, where frequent lifting is required to clean the desired surface areas. 
     Handvac Center of Gravity in the Upright Modes 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, when the apparatus is in an upright mode and, in particular in a large dirt capacity upright mode, the center of gravity of the handvac may be located directly above the cyclone bin assembly (or dirt collection chamber) of the upright section. 
     As exemplified in  FIGS. 21 and 25 , apparatus  100  is shown in a large dirt capacity upright mode in a storage position. In the illustrated example, handvac  112  is shown including a handvac center of gravity  524 . As shown, center of gravity  524  may be positioned vertically above dirt collection assembly  140 /cyclone bin assembly  160  between the front and rear ends  532 ,  544  and  536 ,  548  of dirt collection assembly  140 /cyclone bin assembly  160 . Preferably, center of gravity  524  is positioned substantially centrally between front and rear ends  532 ,  544  and  536 ,  548  of dirt collection assembly  140 /cyclone bin assembly and may be aligned with the wand. 
     Alternately, or in addition, as exemplified, center of gravity  524  is positioned between cyclone bin assembly  136  and suction motor  204 , inside premotor filter chamber  556  of handvac  112 . 
     Configuration of the Auxiliary Assembly 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a surface cleaning apparatus may have an upright section with an auxiliary dirt collection assembly  140  or auxiliary cyclone bin assembly  160  sized, shaped, and positioned according any one of a plurality of different configurations relative to the wand of the upright section and the handvac. 
     In some embodiments, a surface cleaning apparatus is provided having an upright mode wherein the auxiliary assembly  140 ,  160  and the handvac are positioned on the same side of the wand. As exemplified in  FIGS. 1, 21, 24, 45, and 46 , auxiliary assembly  140 ,  160  and handvac dirt collection chamber  188  may both extend rearwardly of wand  144 . Referring to  FIG. 21 , rear end  536  of dirt collection assembly  140  is shown positioned a rearward distance  564  from wand axis  568 . Bottom wall  216  of dirt collection chamber  188  is shown positioned a rearward distance  576  from wand axis  568 . Preferably, distances  564  and  576  are substantially equal. In alternative embodiments, distances  564  and  576  may be different. For example, distance  560  may be greater than distance  576 , or distance  576  may be greater than distance  564 . If rear end  536  is at an angle to the vertical as exemplified, then the handvac is preferable designed such that the rear end does not extend rearwardly past a projection of the line of rear end  536 . Accordingly, the lowest extend to which upright section  108  may be pivoted rearwardly is determined by the auxiliary assembly and not the handvac. 
     In some embodiments, a surface cleaning apparatus is provided having a upright mode wherein the auxiliary assembly  140 ,  160  and the handvac are positioned on opposite sides of the wand. As exemplified in  FIG. 26 , dirt collection assembly  140  of upright section  108  is positioned forwardly of wand  144 , and handvac dirt collection chamber  188  is positioned rearwardly of wand  144 . An advantage of this design is that the weight of the auxiliary assembly  140 ,  160  is on the opposite side of wand  144  from the handvac and may assist in offsetting the hand weight of the handvac felt by a user holding the handle of the handvac. 
     In some embodiments, a surface cleaning apparatus is provided having a upright mode where the auxiliary assembly  140 ,  160  and handvac are positioned on opposite left and right sides of the wand. For example, in apparatus  168 , cyclone bin assembly  160  may be mounted to one of the left or right sides of upright section  108 , and handvac  112  may be oriented relative to the upright section  108  such that dirt collection chamber  188  extends to the other of the left or right sides of upright section  108 . 
     In some embodiments, the auxiliary assembly  140 ,  160  of the upright section surrounds at least a portion of the wand. Referring to  FIGS. 1, 21, 24, 45 and 46 , apparatus  100  is shown including an upright section  108  having dirt collection assembly  140  which partially surrounds wand  144 . In the illustrated example, dirt collection assembly  140  includes a channel  584  for receiving at least a portion of wand  144 . As shown, channel  584  may extend the height  588  of dirt collection assembly  140  between lower and upper ends  292  and  596 . Channel  584  may also extend in depth from front end  532  rearwardly toward rear end  536 . 
     As exemplified, dirt collection assembly  140  includes left and right portions  600  and  604  on opposite left and right sides of channel  584 . In the upright mode of apparatus  100 , wand  144  may be at least partially received in channel  584 , whereby left and right portions  600  and  604  are positioned to the left and right sides of wand  144 . As shown, a front end  532  of dirt collection assembly  140  may extend forwardly of wand  144 , such that at least a portion of wand  144  is positioned between the front and rear ends  532  and  536  of dirt collection assembly  140 . 
     In the illustrated embodiment, dirt collection assembly  140  may also surround at least a portion of handvac  112  in the upright mode of apparatus  100 . In the illustrated embodiment, an outlet end  608  of wand  144  may be received in channel  584  of dirt collection assembly  140 . Accordingly, a front portion of handvac  112  may extend into channel  584  for connection with outlet end  608  of wand  144 . In the illustrated embodiment, nozzle  412  and inlet passage  420  of handvac  112  may be positioned inside channel  584  of dirt collection assembly  140  in the upright mode of apparatus  100 . 
     Upright section with a Plurality of Cyclones 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the supplemental cyclone bin assembly  160  may have a plurality of cyclones positioned in series and/or in parallel in the airflow path. The cyclones may be positioned to the same side of the upright section (e.g., front or back, left or right), or on different sides of the upright section (e.g., one front and one back or one on the right side and one on the left side). In one embodiment, the upright section may use two cyclones and the wand may be positioned between the two cyclones. 
     As exemplified in  FIGS. 47-51 , auxiliary cyclone assembly  160  comprises first and second supplemental cyclone bin assemblies  161 , which may be individual units or may be formed as a single unit or housing. Each cyclone bin assembly  161  is shown including a cyclone chamber  308  and a dirt collection chamber  141 . Dirt collection chambers  141  may be combined to form a common repository for dirt separated by both cyclone bin assemblies  161  or each cyclone bin assembly  161  may have a separate dirt collection chamber  141 . 
     Each cyclone chamber  308  may be any suitable cyclone chamber and maybe the same or different. As shown, each cyclone chamber  308  may include a tangential air inlet  344  proximate upper end  374 , and an axial air outlet  320  at a downstream end of vortex finder  400 . 
     Cyclone bin assemblies  161  may be positioned in parallel in the airflow path between surface cleaning head  104  and handvac  112 . As exemplified, the airflow path may extend from surface cleaning head  104  through an upstream wand portion  440 , diverge into the inlets  316  of cyclone chambers  308  through cyclone chambers  308  to their respective air outlets  320 . Each cyclone bin assembly  161  may include an outlet passage  476  connecting air outlets  320  to downstream portion  444  of wand  144  where the airflow path converges. From downstream portion  444  of wand  144 , the airflow path may extend through handvac  112  and exit out clean air outlet  132 . 
     As exemplified, upstream and downstream portions  440  and  444  of wand  144  may be divided by a diversion member  712 , which is described subsequently with respect to a further alternate aspect. Air traveling downstream through upstream portion  440  may contact diversion member  712  and be redirected laterally into air inlets  316  of cyclone chambers  308 . Outlet passages  476  of cyclone bin assemblies  161  may converge to form a single airflow path in downstream portion  444  of wand  144  above diversion member  712 . 
     Diversion Valve 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a diversion valve is provided which diverts air travelling through upright section  108  (e.g., the wand  144 ) into the auxiliary assembly  160  (e.g., supplemental cyclone or cyclones  308 ). Preferably, the diversion valve operates automatically upon the auxiliary assembly  160  being disconnected from and/or connected to the surface cleaning apparatus. 
     As exemplified in  FIG. 20 , cyclone bin assembly  160  may be selectively connected to upright section  108  whereby the airflow path may be reconfigured to extend through cyclone bin assembly  160 . Similarly, cyclone bin assembly  160  may be selectively disconnected from upright section  108  whereby the airflow path may be reconfigured to extend through wand  144  from end to end without diversion. Preferably, the airflow path reconfiguration is automatic upon connection and/or disconnection of cyclone bin assembly  160  to upright section  108 . 
     In some embodiments, wand  144  may include a diversion outlet  704  and a diversion inlet  708  positioned between the upstream and downstream ends  360  and  364  of wand  144 . The diversion outlet  704  and diversion inlet  708  may be selectively opened when connecting cyclone bin assembly  160  to upright section  108  to reconfigure the airflow path to divert into the cyclone bin assembly  160  at diversion outlet  704 , and to return to the wand  144  from cyclone bin assembly  160  at diversion inlet  708 . Upright section  108  may include a diversion valve for opening and closing diversion outlet  704  and inlet  708 . 
     A diversion valve  712  according to a first embodiment is exemplified in  FIGS. 52-57 . As exemplified, diversion valve  712  may include a sleeve  716  positioned inside of wand  144 , and a pedal  720  for moving sleeve  716  between an open position and a closed position. 
     Sleeve  716  may be a conduit for fluidly coupling upstream and downstream wand portions  440  and  444  in the closed position of diversion valve  712  (see  FIGS. 52 and 55 ) to bypass diversion outlet and inlet  704  and  708 . Preferably, sleeve  716  may be a rigid conduit. Alternatively, sleeve  716  may include flexible and/or collapsible elements. Effectively, sleeve  716  may close diversion outlet and inlet  704  and  708  in the closed position of diversion valve  712 . Optionally, diversion valve  712  may include one or more sealing members (e.g. O-rings) which may form an air-tight seal between sleeve  716  and upstream wand portion  440 , and between sleeve  716  and downstream wand portion  444  to help prevent the escape of air through diversion outlet and inlet  704  and  708  in the closed position of diversion valve  712 . 
     Sleeve  716  may be movable axially along wand  114  between the closed position ( FIGS. 52 and 55 ) and the open position ( FIGS. 54 and 57 ). Preferably, sleeve  716  is moved to the open position automatically by mounting cyclone bin assembly  160  to upright section  108  (e.g. connecting to wand  144 ), and/or moved to the closed position automatically by dismounting cyclone bin assembly  160  from upright section  108  (e.g. disconnecting from wand  144 ). In the illustrated embodiment, sleeve  716  is drivingly coupled to a pedal  720 . Pedal  720  may be depressed to move sleeve  716  from the closed position of  FIGS. 52 and 55  to the open position of  FIGS. 54 and 57 . As shown, pedal  720  may be positioned axially below sleeve  716  and extend outwardly of wand  144  to be depressed by cyclone bin assembly  160  when mounting cyclone bin assembly  160  to upright section  108 . Pedal  720  and sleeve  716  may be integrally molded, or separately formed and connected, to move axially up and down as a unit. 
     As exemplified, pedal  720  and sleeve  716  may be movably mounted to wand  144  for axial movement between the open and closed position. As shown, pedal  720  and sleeve  716  may move downwardly from the closed position ( FIGS. 52 and 55 ) to the open position ( FIGS. 54 and 57 ). In the closed position, sleeve  716  may extend the airflow path directly across the threshold between the upstream and downstream wand portions  440  and  444 . In the open position, sleeve  716  may be retracted into the upstream wand portion  440  to open diversion outlet  704  and inlet  708 , and thereby permit the airflow path to be diverted through diversion outlet  704 , cyclone bin assembly  160  and diversion inlet  708 . As shown, diversion outlet  704  may be positioned at a downstream end  724  of upstream wand portion  440 , and diversion inlet  708  may be positioned at an upstream end  728  of downstream wand portion  444 . 
     In an alternative embodiment, sleeve  716  may have one or more openings which align with diversion outlet and inlet  704  and  708  in the open position of valve  712 . In the closed position, the openings in sleeve  716  may be closed by alignment with solid wall portions of wand  144 , and diversion outlet and inlet  704  and  708  may be closed by alignment with solid wall portions of sleeve  716 . In this case, sleeve  716  may be positioned inside the upstream and downstream wand portions  440  and  444  in both the open and closed positions of valve  712 . 
     Preferably, sleeve  716  is biased to the closed position. For example, valve  712  may include a biasing member which acts on sleeve  716  to bias sleeve  716  to the closed position. In the illustrated example, valve  712  includes a spring  732  which acts on pedal  720  to urge pedal  720  and sleeve  716  upwardly to the closed position. In alternative embodiments, sleeve  716  may not be biased to the closed position. For example, sleeve  716  may include an actuator, such as a switch or lever, which must be manually activated to move sleeve  716  to the closed position or is moved by assembly  160  when assembly  160  is removed. 
     Still referring to  FIGS. 52-57 , cyclone bin assembly  160  may include an engagement member for mating with pedal  720  to mount cyclone bin assembly  160  on pedal  720 . In the illustrated example, a cavity  736  is formed in sidewall  376  of cyclone bin assembly  160  for receiving pedal  720 . In use, cyclone bin assembly  160  may be set onto pedal  720  such that pedal  720  is received in cavity  736 . Preferably, the weight of cyclone bin assembly  160  on pedal  720  is sufficient to overcome the bias of valve biasing member  732 , and move pedal  720  and sleeve  716  downwardly to the open position. In alternative embodiments, additional downward force must be applied by the user to move pedal  720  and sleeve  716  downwardly against the bias of the biasing member  732  and/or an actuator, such as a foot pedal, may be utilized. 
     Cyclone bin assembly  160  may be toed onto pedal  720  (see e.g.,  FIGS. 53, 56 ), and then pivoted on pedal  720  into position (see e.g.,  FIGS. 54, 57 ) after pedal  720  and sleeve  716  have moved downwardly to the open position. In the illustrated example, cyclone bin assembly  160  may be set onto pedal  720  with cyclone axis  392  extending at a (non-zero) angle to wand axis  740 , and then lowered with pedal  720  to move valve  712  to the open position, and finally pivoted about pedal  720  toward wand  144  to complete the connection of cyclone bin assembly  160  to wand  144 . An locking member, such as a latch  744 , which may be located at the end of the upper end or wand  144 , may be provided to secure assembly  160  in position. In some embodiments, cyclone axis  392  may be substantially parallel to wand axis  740  when cyclone bin assembly  160  is connected to wand  144 . 
     Cyclone bin assembly  160  may include a diversion member  428  for dividing wand  144  into upstream and downstream wand portions  440  and  444 , and for diverting flow from the upstream wand portion  440  into cyclone bin assembly inlet  316 . Diversion member  428  may take any suitable form. In the illustrated embodiment, diversion member  428  is a substantially flat plate which extends outboard of sidewall  376  for protruding into wand  144  through one of diversion outlet  704 , diversion inlet  708 , or another opening into wand  144 . Alternatively, diversion member  428  may be curved to provide a less abrupt change in airflow direction, which may reduce the pressure drop across the diversion member  428 . Optionally, diversion member  428  may include or interface with a sealing member (e.g. a deformable elastomeric seal) to form an airtight barrier between upstream and downstream wand portions  440  and  444 . Alternately, the diversion member may be a separate member that is installed as a separate step when (i.e. before, during, and/or after) connecting cyclone bin assembly  160  to the wand  144 . 
     As exemplified, when cyclone bin assembly  160  is mounted to wand  144 , as shown in  FIGS. 54 and 57 , air inlet  316  of cyclone chamber  308  is connected to diversion outlet  704  for receiving air from upstream wand portion  440  into cyclone chamber  308 , and outlet passage  476  is connected to diversion inlet  708  for discharging air from cyclone bin assembly  160  into downstream wand portion  444 . 
     Cyclone bin assembly  160  may be removably mounted to wand  144  by any suitable mechanism. In the illustrated embodiment, cyclone bin assembly  160  includes a latch  744  on handle  616  for engaging a tab  746  which extends outwardly of wand  144 . Latch  744  may be user-operable by a user grasping handle  616  to release latch  744  from tab  746  for disconnecting cyclone bin assembly  160  from wand  144 . Preferably, biasing member  732  of valve  712  automatically and immediately moves sleeve  716  to the closed position upon disconnection of cyclone bin assembly  160  to reconfigure the airflow pathway by closing diversion inlet and outlet  704  and  708 . 
     A diversion valve  712  according to a second embodiment is exemplified in  FIGS. 58-63 . Diversion valve  712  is similar to diversion valve  712  of  FIGS. 52-57  in many respects except, for example that sleeve  716  is embodied by a collapsible hose  716  instead of a more rigid conduit. 
     As exemplified, diversion valve  712  includes a collapsible sleeve  716  positioned inside of wand  144 , and a pedal  720  for moving hose  716  been an open position and a closed position. 
     Sleeve  716  may be a collapsible conduit for fluidly coupling upstream and downstream wand portions  440  and  444  in the closed position of diversion valve  712  (see  FIGS. 60 and 63 ) to bypass diversion inlet and outlet  708  and  712 . Optionally, diversion valve  712  may include one or more seals (e.g. O-rings) which form an air-tight seal between sleeve  716  and upstream wand portion  440 , and between sleeve  716  and downstream wand portion  444  to help prevent the escape of air through diversion inlet and outlet  704  and  708  in the closed position of diversion valve  716 . 
     In the illustrated embodiment, sleeve  716  has a fixed-position upstream end  756  sealed to upstream wand portion  440 , and a downstream end  760  axially movable inside wand  144 . Downstream end  760  may be movable toward upstream end  756  to the open position ( FIGS. 60 and 63 ) whereby sleeve  716  is partially collapsed with downstream end  760  positioned in the upstream wand portion  440  upstream of diversion outlet  704 . Downstream end  760  may also be movable away from upstream end  756  to the closed position ( FIGS. 58 and 61 ) whereby sleeve  716  is extended with downstream end  760  position in the downstream wand portion  444  downstream of diversion inlet  708 . 
     As exemplified, pedal  720  may be drivingly coupled to downstream end  760  of sleeve  716 . Pedal  720  may be depressed (e.g. by the weight of cyclone bin assembly  160 ) to move downstream end  760  into the upstream wand portion  440 , collapsing sleeve  716  into the open position of  FIGS. 60 and 63 . Pedal  720  may also be raised (e.g. automatically by action of biasing member  732  upon release of pedal  720  or pulled upwardly by assembly  160 ) to move downstream end  760  into the downstream wand portion  444 , extending sleeve  716  into the closed position of  FIGS. 58 and 61 . Alternately, a manual actuator may be used. 
     A diversion valve  712  according to a third embodiment is exemplified in  FIGS. 64-71 . As exemplified, diversion valve  712  may include a diversion outlet door  772  and a diversion inlet door  776 . Doors  772  and  776  may be opened when cyclone bin assembly  160  is connected to wand  144  for reconfiguring the airflow path to extend through cyclone bin assembly  160 . Doors  772  and  776  may also be closed when cyclone bin assembly  160  is disconnected from wand  144  for reconfiguring the airflow path to extend directly across the threshold between upstream and downstream wand portions  440  and  444 . 
     In the illustrated embodiment, doors  772  and  776  are pivotally mounted to wand  144  for movement between a closed position (see  FIGS. 64 and 67-69 ) in which doors  772  and  776  seal diversion outlet  704  and inlet  708  respectively, and an open position (see  FIGS. 66 and 71 ) in which doors  772  and  776  are open to allow air to flow through doors  772  and  776  between wand  144  and cyclone bin assembly  160 . Doors  772  and  776  may be pivotally mounted to wand  144  in any suitable manner. In the example shown, doors  772  and  776  are pivotally mounted to wand  144  by a common hinge  780 . As shown, door  772  may pivot inwardly about hinge  780  toward a downstream direction, and door  776  may pivot inwardly about hinge  780  toward an upstream direction. In alternative embodiments, each of doors  772  and  776  may be pivotally mounted to wand  144  by a different hinge. 
     Preferably, doors  772  and  776  open automatically by connecting cyclone bin assembly  160  to wand  144 . In the illustrated example, cyclone bin assembly  160  includes an inlet nose  784  for pushing open diversion outlet door  772 , and an outlet nose  788  for pushing open diversion inlet door  776 . As shown, noses  784  and  788  may extend outwardly of sidewall  376  for projecting through diversion outlet and inlet  704  and  708  respectively upon connecting cyclone bin assembly  160  to wand  144 . 
     Preferably, when cyclone bin assembly  160  is connected to wand  144 , an airflow path is formed between diversion outlet  704  and air inlet  316 , and between diversion inlet  708  and air outlet  320 , such that the airflow path from upstream wand portion  440  to downstream wand portion  444  is reconfigured to extend through cyclone bin assembly  160 . In the illustrated example, connecting cyclone bin assembly  160  to wand  144  may include pushing noses  784  and  788  into diversion outlet and inlet  704  and  708  respectively to open doors  772  and  776 . 
     Noses  784  and  788  may take any suitable form. As exemplified, nose  784  may be formed as a diversion member including an inlet passage having an upstream end  792  and a downstream end  796 . Upstream end  792  may extend into wand  144  and form a seal with upstream wand portion  440  to redirect the airflow in upstream wand portion  440  to enter nose  784  toward downstream end  796 . In the illustrated embodiment, upstream wand portion  440  includes a sealing ring  800  adjacent an upstream side  804  of diversion outlet door  772  onto which downstream end  796  may be seated for forming an airtight seal between upstream wand portion  440  and downstream end  796 . Alternatively, or in addition, upstream side  804  may include a sealing member. Downstream end  796  of nose  784  may be integrally formed or otherwise connected with air inlet  316 . 
     In the illustrated example, nose  788  is formed as a triangular plate which projects outwardly from air outlet  320 . In other embodiments, nose  788  may have another suitable form for pushing diversion inlet door  776 , such as a circular or rectangular plate or a rod for example. As shown, when cyclone bin assembly  160  is connected to wand  144 , nose  788  projects into diversion inlet  708  pushing open diversion inlet door  776 . This may permit air outlet  320  to sealingly abut diversion inlet  708  for forming an airflow path between air outlet  320  and downstream wand portion  444 . Optionally, a seal  808  may be provided at the interface between air outlet  320  and diversion inlet  708  for enhancing the airtightness of the connection. 
     It will be appreciated that in alternative embodiments, nose  788  may be formed as an outlet passage, which may be curved similar to nose  784 . This may make the change in airflow direction across nose  788  less abrupt, which may reduce pressure losses. 
     Preferably, when cyclone bin assembly  160  is disconnected from wand  144 , doors  772  and  776  automatically close to reconfigure the airflow passage to extend directly from upstream wand portion  440  to downstream wand portion  444  without diversion through diversion outlet  704  or inlet  708 . For example, doors  772  and  776  may be biased to the closed position by a biasing member, such as a spring. In the illustrated embodiment, diversion valve  712  includes a torsional spring  812 . Spring  812  may be positioned to bias both of doors  772  and  776  to the closed position. In the illustrated embodiment, spring  812  is held in a spring housing  816  mounted to an inside face  820  of diversion outlet door  772 . As shown, spring  812  may have an arm  824  connected to diversion inlet door  776 , effectively biasing doors  772  and  776  away from each other to their respective closed positions. In alternative embodiments, each of doors  772  and  776  may have a separate biasing member. 
     A diversion valve  712  according to a fourth embodiment is exemplified in  FIGS. 72-77 . Diversion valve  712  is similar to diversion valve  712  of  FIGS. 64-71  in many respects except, for example, the door which selectively closes diversion outlet  704  and inlet  708 . 
     In the illustrated embodiment, diversion valve  712  includes a door  772 . Door  772  may be movable between a closed position ( FIGS. 72 and 75 ) in which door  772  seals diversion outlet  704  and inlet  708 , and an open position ( FIGS. 74 and 77 ) in which door  772  is unsealed from outlet  704  and inlet  708  to allow the airflow to pass through diversion outlet  704  and inlet  708 . As exemplified, diversion valve  712  may include one door  772  for closing both of diversion outlet  704  and inlet  708 , or separate doors  772  for diversion outlet  704  and inlet  708 . 
     As shown, door  772  may be pivotally mounted to wand  144  in any suitable manner for movement between the open and closed positions. For example, door  772  may be pivotally mounted outside of wand  144  by a hinge  780 . In the illustrated example, door  772  may pivot outwardly about hinge  780  away from wand  144  to the open position, and may pivot inwardly about hinge  780  toward wand  144  to the closed position. Preferably, door  772  is manually openable, whereby a user may grasp door  772  and manually move door  772  from the closed position to the open position. For example, door  772  may have a lever  840 , a handle, or another gripping member for a user to grasp for manipulating the position of door  772 . 
     Once door  772  is opened, as shown in  FIGS. 73 and 76 , cyclone bin assembly  160  may be connected to wand  144 . In the illustrated embodiment, cyclone bin assembly  160  includes a diversion member  428  of the type describe above with reference to  FIGS. 52-57 . Diversion member  428  may be moved into wand  144  through diversion outlet  704 , diversion inlet  708 , or another opening in wand  144 , for dividing wand  144  into an upstream portion  440  and a downstream portion  444 , substantially as described above. 
     When cyclone bin assembly  160  is disconnected from wand  144 , door  772  may be moved back into the closed position for reconfiguring the airflow path in wand  144  to extend directly from upstream portion  440  to downstream portion  444  without diversion. For example, door  772  may be manually moved from the open position to the closed position by hand, or door  772  may move automatically to the closed position by the bias of a biasing member (e.g. a spring). 
     In some embodiments, door  772  may be held in the closed position by the bias of a biasing member, or by a releasable locking mechanism (e.g. a latch). This may permit door  772  to form a tight seal against diversion outlet  704  and inlet  708 . 
     In some embodiments, pedal  720  may be foot operable and may be located close to or on the surface cleaning head. 
     Angular Surface of Upright Section 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a surface cleaning apparatus is provided having an upright section with a dirt collection chamber or cyclone bin assembly having a side profile that tapers or narrows from top to bottom. For example, the rear wall of the supplemental dirt collection chamber or supplemental cyclone bin assembly may extend upwardly at an acute angle relative to the wand axis such that the rear wall is farther from the wand axis at the top end than at the bottom end of the dirt collection chamber or cyclone bin assembly. An advantage of this design is that the surface cleaning apparatus may extend under furniture while providing a large dirt collection capacity. 
     As exemplified in  FIGS. 3 and 7 , surface cleaning apparatus  100  and  152  include an upright section  108  having a dirt collection chamber  140  or cyclone bin assembly  160  that extends from a lower end  292 ,  856  proximate surface cleaning head  104  to an upper end  596 ,  860 . A rear end  536 ,  548  of auxiliary assembly  140 / 160  may extend upwardly from lower end  292  or  856  at a (non-zero) acute angle  848  to wand axis  568 . Angle  848  is preferably between 10 and 70 degrees, and more preferably between 20 and 40 degrees. For example, a distance  538  between wand axis  568  and rear end  536 ,  548 , measured normal to wand axis  568 , may increase continually or generally continuously from lower end  292 ,  856  upwardly. As shown, distance  538  is greater at upper end  596 .  860  than at lower end  292 , r  856 . 
     Handvac with Angled Bottom Wall 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a handvac may be provided having a bottom, such as a flat bottom wall, for supporting the handvac on a horizontal surface, and which extends at an acute angle (e.g., between 20 and 40 degrees) away from the inlet nozzle axis, and optionally at about the in-use orientation of the hand vac. This may provide the handvac with a resting orientation that is closer to or essentially at the in-use orientation of the handvac. For example, the in-use orientation of the handvac may normally have the inlet nozzle axis extending at a downward angle relative to a horizontal surface to be cleaned. Thus, a user may not have to substantially reorient the handvac upon grasping the handvac in the resting orientation to reposition the handvac into the in-use orientation. 
     Reference is now made  FIG. 78 , where handvac  112  is shown resting on a horizontal surface  876 . As shown, nozzle axis  884  extends at an angle  880  to horizontal surface  876 . Angle  880  may be an acute angle which may be between 10 and 80 degrees, and preferably between 25 and 65 degrees, more preferably between 35 and 55 degrees or between 20 and 40 degrees. It will be appreciated that handvac  112  may be stably supported in any suitable manner, with nozzle axis  884  extending at angle  880  to horizontal surface  876 . For example, handvac  112  may include one or more support elements (e.g. a wall or feet) which collectively provide a support for handvac  112  on a horizontal planar surface at a desired acute angle, and a center of gravity  524  vertically aligned with or between the support elements for stability when handvac  112  is so supported by the support element(s) on the horizontal surface. 
     As exemplified, bottom wall  216  of handvac  112  may extend at an angle  880  to inlet nozzle axis  884  of nozzle  412 . Bottom wall  216  may be planar, and the plane of bottom wall  216  may intersect with nozzle axis  884  at angle  880 . Bottom wall  216  may provide a flat planar surface for making broad contiguous contact with horizontal surface  876 , or bottom wall  216  may include a plurality of discrete contact points or surfaces which collectively contact the horizontal surface  876  to support the handvac  112  (e.g. as in the feet of a tripod, or the wheels of a car). Preferably, handvac center of gravity  524  is preferably aligned vertically above bottom wall  216  when handvac  112  is supported on horizontal surface  876  by bottom wall  216 . This may permit handvac  112  to rest stably (i.e. statically without tipping over) on horizontal surface  876  while supported solely by bottom wall  216 . 
     Handvac  112  may have an in-use orientation relative to horizontal surface  876  at which a user may comfortably operate handvac  112  during cleaning. Typically, handvac  112  is most comfortably operated in an orientation that does not require an application of torque by the user&#39;s hands when the handvac  112  is held by handle  484 . This may be the case where the center of gravity  524  of the handvac  112  is aligned vertically below the user&#39;s hand. Accordingly, the center of gravity  524  may be vertically aligned below handle  484  in comfortable in-use orientations of handvac  112 . 
     Preferably, center of gravity  524  is aligned vertically below handle  484  when handvac  112  is supported on horizontal surface  876 . In the illustrated embodiment, center of gravity  524  is aligned vertically below handle  484  when bottom wall  216  is horizontal and supporting handvac  112  on a horizontal surface  876 . Thus, the resting orientation of handvac  112  supported by bottom wall  216  on a horizontal surface  876  may be substantially the same as the in-use orientation of handvac  112 . Accordingly, when a user grasps handvac  112  by handle  484  and lifts handvac  112 , handvac  112  may already be in a balanced in-use position with the center of gravity  524  aligned below the user&#39;s hands. 
     In many cases, handvac  112  may be stored on a surface below a user&#39;s elbows. A user may angle their forearm downwardly to grasp handle  484  of handvac  112 . In this case, the user&#39;s fingers and palm may be naturally aligned for grasping a handle which is angled forwardly of vertical. For example, to grasp a vertically oriented handle that is positioned below a user&#39;s elbow, a user may need to contort their wrist to conform to the orientation of the handle. 
     In the illustrated embodiment, handle axis  888  of handle  484  extends at a (non-zero) forward angle  892  to the vertical (e.g., e.g. when bottom wall  216  is horizontal). This may provide a comfortable handle alignment for grasping by a user when picking up handvac  112 , and when using handvac  112  for cleaning surfaces below the user&#39;s elbows. Preferably, angle  892  is an acute angle of between 10 and 80 degrees, more preferably between 20 and 70 degrees and most preferably between 30 and 60 degrees. 
     Bottom wall  216  may be a wall of any component of handvac  112 . In the illustrated embodiment, bottom wall  216  is a wall of cyclone bin assembly  136 . Preferably, bottom wall  216  is a wall of dirt collection chamber  188 . In the example shown, bottom wall  216  is an openable wall of dirt collection chamber  188 .  FIG. 79  shows another embodiment of handvac  112  where bottom wall  216  is not openable. 
     Referring to  FIG. 78 , bottom wall  216  of handvac  112  may include front wheels, rear wheels, or both. Wheels may provide rolling support for handvac  112  when cleaning under furniture, for example. In alternative embodiments, handvac  112  may not include wheels on bottom wall  216  as shown. 
     Handle Position 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a floor cleaning apparatus is provided having a handvac with a handle, and an upright section with a cyclone bin assembly or dirt collection chamber with a handle. Preferably, the handles are centrally aligned with a plane of symmetry of the apparatus. This may permit the handles to be grasped for a balanced control of the apparatus. For example, the handles may be parallel to the same plane of symmetry. 
     Alternately, as exemplified in  FIG. 2 , one handle may be parallel to a plane of symmetry and the other transverse thereto but positioned such that the plane of symmetry extends through the transversely oriented handle. In the illustrated example, handvac  112  includes a handle  484  which extends along a handle axis  888 . As exemplified, handle axis  888  may lie in a vertical plane  1044 , which is aligned centrally between left and right sides of apparatus  100  (i.e., a plane of symmetry). Turning to  FIG. 78 , handle  484  is shown extending in length between a first handle end  1048  at the upper end  1052  of handvac  112 , and a second handle end  1056  intermediate the upper and lower ends  1052  and  1060  of handvac  112 . 
     Returning to  FIG. 2 , assembly  140  is shown including a handle  1064 . As illustrated, handle  1064  may have a handle axis  1068  which extends perpendicularly or transverse to plane  1044  and handle axis  888 . Handle  1064  may be formed in a rear end  536  of assembly  140 . For example, handle  1064  may be flush with rear end  536  and include a concave finger cavity  1072  to facilitate grasping handle  1064 . Preferably, handle  1064  is positioned laterally centrally such that plane  1044  intersects handle  1064 , and optionally bisects handle  1064  at a midpoint between handle ends  1076  and  1080 . 
     Handles  484  and  1064  may be positioned on opposite sides of surface cleaning apparatus  100 . For example, handle  484  is shown extending from an upper end  1052  proximate the front surface of apparatus  100 , and handle  1064  is shown extending flush with a rear surface of apparatus  100 . 
     Apparatus  100  may include one or more actuator controls (e.g. buttons, levers, or switches) for controlling various functionality such as opening or disconnected elements, or connecting power to elements. Preferably, at least some of the actuator controls are positioned on or within finger reach of a handle to permit the control to be activated while grasping the handle. This may permit single handed operation of the function provided by the control. 
     Referring to  FIG. 1 , apparatus  100  is shown including a power switch  1084  located on upper end  1052  of handvac  112  proximate first handle end  1048  within finger-reach when grasping handvac handle  484 . As illustrated, power switch  1084  may be laterally centrally positioned such that plane  1044  intersects and more preferably bisects power switch  1084 . 
     Referring now to  FIGS. 15 and 16 , apparatus  168  is shown including an upright section  108  having a cyclone bin assembly  160  with a handle  616 , and handvac  112  with handle  484 . As shown, handle axis  1092  of handle  616 , and handle axis  888  of handvac handle  484  may extend in a same plane  1096 . Preferably, plane  1096  is a vertical plane positioned laterally centrally between left and right sides of apparatus  168  as shown. In the illustrated embodiment, plane  1096  bisects handles  616  and  484 . 
     In the illustrated embodiment, handvac  112  includes a power switch  1084  located on upper end  1052  of handvac  112  which is bisected by plane  1044 . Handle  616  of cyclone bin assembly  160  is also shown including a button  1100  for releasing latch  744  to disconnect cyclone bin assembly  160  from wand  144 . As illustrated, button  1100  may be positioned laterally centrally between left and right sides of apparatus  168  such that button  1100  is bisected by plane  1096 . 
     Handvac Axial Alignment 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a plurality of airflow path segments in the handvac may extend in parallel. In some cases, this may reduce the number of bends in the airflow path through the handvac, which may reduce the pressure drop across the airflow path. 
     As exemplified in  FIG. 96 , handvac inlet nozzle  412  may extend in length from an upstream nozzle end  416  rearwardly along a nozzle axis  884 , handvac cyclone chamber  184  may extend from an air inlet  192  along a cyclone axis  248  to an air outlet  196 , and handvac suction motor  204  may extend from a motor inlet  1108  along a motor axis  252  to a motor outlet  1112 . 
     In some embodiments, two or more of nozzle axis  884 , cyclone axis  248 , and motor axis  252  may be parallel. For example, in the illustrated embodiment, nozzle axis  884 , cyclone axis  248 , and motor axis  252  are parallel. In some embodiments, two or more of nozzle axis  884 , cyclone axis  248 , and motor axis  252  may be co-axial. For example, in the illustrated embodiment, nozzle axis  884  and cyclone axis  248  are co-axial. In other embodiments, nozzle axis  884 , cyclone axis  248 , and motor axis  252  may all be co-axial. 
     In the illustrated embodiment, handvac  112  may include an electrical connector  1116  for providing power to an upstream attachment (e.g. a surface cleaning head). As shown, connector  1116  may extend from a front connector end  1120  along a connector axis  1124  to a rear connector end  1128 . In some embodiments, connector axis  1124  may be parallel to one or more of nozzle axis  884 , cyclone axis  248 , and motor axis  252 . In the illustrated embodiment, connector axis  1124  is parallel to nozzle axis  884 , cyclone axis  248 , and motor axis  252 . 
     In some embodiments, handvac  112  may include one or more electrical cables  1132  which extend from electrical connector  1116  rearwardly to electrically couple electrical connector  1116  with a source of power (not shown). In the illustrated embodiment, electrical cables  1132  extend from electrical connector  1116  rearwardly along vortex finder  1136  of cyclone chamber  184  toward motor housing  1138 . As shown, at least the portion of electrical cables  1132  which along vortex finder  1136  across cyclone chamber  184  is parallel to cyclone axis  248 . 
     Axial Cyclone Inlet 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a handvac may be provided having a cyclone chamber with an axial inlet. That is, the inlet axis may be parallel to the cyclone axis, and more preferably co-axial with the cyclone axis. In some cases, this may reduce the bends in the airflow path through the cyclone, which may reduce the pressure drop across the cyclone for better pneumatic efficiency. Preferably, the cyclone is a uniflow cyclone wherein the air outlet is at the opposite end from the air inlet. Alternately, or in addition, the axial inlet includes a portion that converts the axial flow to a tangential flow wherein the portion is provided within the diameter of the cyclone chamber. Optionally, the axial inlet is parallel to and may be co-axial with the handvac air inlet. 
     As exemplified in  FIG. 96 , handvac cyclone chamber  184  includes an air inlet  192  and an air outlet  196 . As shown, air inlet  192  may include an inlet axis  1140  which is parallel to cyclone axis  248 . Air inlet  192  may have a circular section transverse to axis  1140  with an inlet diameter  1144 , or rectangular with a side dimension  1144 . Preferably, the cross-sectional area of air inlet  192  is approximately equal to the cross-sectional area of inlet nozzle  412 . Preferably, the cross-sectional area of air inlet  192  is between 80%-125% of the cross-sectional area of the inlet nozzle  412 , more preferably 90%-120%, and most preferably 100%-115%. 
     Preferably, inlet  192  is in fluid communication with an upstream end  388  of an inlet passage  384 . Inlet passage  384  may redirect the axial flow through inlet  192  to a tangential flow for developing a cyclonic motion inside cyclone chamber  184 . Referring to  FIGS. 23 and 23   a , inlet passage  384  may extend from upstream passage end  388  to downstream passage end  396  across an arcuate angular extent  1148 . Preferably angular extent  1148  is between 45 and 300°, more preferably between 60 and 250°, and most preferably between 90 and 200°. 
     Returning to  FIG. 96 , inlet passage  384  is shown having a width  1152 , and a height  1108 . In some embodiments, the cross-sectional area of inlet passage  384  may be approximately equal to the cross-sectional area of air inlet  192 . Preferably, the cross-sectional area of inlet passage  384  is between 80%-125% of the cross-sectional area of the inlet passage  384 , more preferably 90%-120%, and most preferably 100%-115%. 
     Vortex finder  1136  may define an outlet passage to air outlet  196  of cyclone chamber  184 . As shown, vortex finder  1136  may be substantially cylindrical having a diameter  1160 . In the illustrated embodiment, the cross-sectional area of vortex finder  1136  may be approximately equal to the cross-sectional area of inlet nozzle  412 . For example, diameter  1160  may be approximately equal to diameter  1164  of inlet nozzle  412 . Preferably, the cross-sectional area of vortex finder  1136  is between 80%-125% of the cross-sectional area of the inlet nozzle  412 , more preferably 90%-120%, and most preferably 100%-115%. 
     Uniflow Cyclone 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a handvac may be provided having a cyclone chamber wherein the air outlet is at the opposite end from the air inlet. In some cases, this may reduce the bends in the airflow path through the cyclone, which may reduce the pressure drop across the cyclone for better pneumatic efficiency. Optionally, the cyclone inlet is at the front or inlet end of the handvac and may be parallel to or co-axial with the handvac air inlet. 
     As exemplified in  FIG. 96 , handvac inlet  192  is shown positioned at a front end  220  of cyclone chamber  184 , and outlet  196  is shown positioned at a rear end  224  of cyclone chamber  184 . Inlet  192  may have an inlet axis  1140  that is parallel to the outlet axis  1168  of air outlet  196 . In the illustrated embodiment, inlet axis  1140  is co-axial with outlet axis  1168 . 
     Optionally, the suction motor axis may be parallel to or co-axial with axis  1140 ,  1168 . Accordingly, air may travel in a generally uniform direction through the components of the handvac. 
     Handvac Cyclone Dirt Collection Chamber 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the dirt collection chamber of the handvac may have a dirt inlet which is located at the upper end of the dirt collection chamber when the hand vac is oriented for cleaning a floor (see e.g.,  FIGS. 81 and 103 ). In addition, the dirt collection chamber may be shaped to encourage dirt to collect at another end of the handvac away from the dirt outlet of the cyclone chamber (e.g., it may extend downwardly away from the dirt inlet). This may clear the dirt inlet to permit additional dirt to enter. 
     As exemplified in  FIG. 96 , dirt may enter dirt collection chamber  188  from cyclone chamber  184  through dirt outlet  200  of cyclone chamber  184 . In the illustrated embodiment, dirt outlet  200  is at a rear end  224  of cyclone chamber  184 . In use, handvac  112  may be normally oriented with the nozzle  412  at the front end oriented downwardly for cleaning a surface below. Accordingly, dirt entering dirt collection chamber  188  from dirt outlet  200  may fall by gravity toward front end  220  of dirt collection chamber  188  away from dirt outlet  200 . This may help to keep dirt outlet  200  clear for subsequent dirt to move through dirt outlet  200  during use. 
     In the illustrated embodiment, handvac  112  may be supportable on a horizontal surface  876  by contact between dirt collection chamber  188  and the horizontal surface  876 . For example, dirt collection chamber  188  may include a bottom wall  216  for supporting handvac  112  on horizontal surface  876 . Preferably, as discussed previously, handvac  112  is inclined with nozzle  412  facing downwardly when handvac  112  is supported on horizontal surface  876  by bottom wall  216 . In the illustrated embodiment, bottom wall  216  is angled downwardly between front end  220  and rear end  224  for orienting nozzle axis  884  downwardly to horizontal when handvac  112  is supported on horizontal surface  876 . As shown, this may provide dirt collection chamber  188  with a wedge-like shape having a height  1172  measured between upper and lower dirt collection chamber walls  226  and  216  which increases from the front end  220  to the rear end  224 . 
     Pre-Motor Filter Housing 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, a pre-motor filter housing may be provided in the airflow path between the cyclone bin assembly and the suction motor for directing the airflow through one or more pre-motor filters contained therein. 
     As exemplified in  FIGS. 96 and 117 , handvac  112  has a pre-motor filter chamber  556  containing pre-motor filters  1176  and  1180 , and a suction motor housing  1138  containing suction motor  204 . The airflow path from inlet nozzle  412  to clean air outlet  132  may extend downstream from cyclone bin assembly  136  to pre-motor filter chamber  556  to suction motor housing  1138 . That is, cyclone bin assembly  136 , pre-motor filter chamber  556 , and suction motor housing  1138  may be positioned in the airflow path with pre-motor filter chamber  556  downstream of cyclone bin assembly  136  and suction motor housing  1138  downstream of pre-motor filter chamber  556 . 
     In the illustrated example, pre-motor filter chamber  556  extends in height  1184  between an upper end  1188  to a lower end  1192  in the direction of pre-motor filter axis  560 , and extends in depth  1216  between front wall  1220  and rear wall  1224 . In some embodiments, cyclone axis  248  and motor axis  252  may be parallel and vertically offset as shown. For example, each of cyclone axis  248  and motor axis  252  may intersect pre-motor filter chamber  556  as shown. In some embodiments, outlet axis  1168  of cyclone chamber outlet  196  and, motor inlet axis  1196  of motor inlet  1108  may be parallel and vertically offset. For example, each of outlet axis  1168  and motor inlet axis  1196  may intersect pre-motor filter chamber  556  as shown. 
     In some embodiments, cyclone chamber outlet  196  discharges air from cyclone chamber  184  into pre-motor filter chamber  556 , and pre-motor filter chamber  556  discharges air into motor inlet  1108 . For example, cyclone chamber outlet  196  may be positioned at the threshold between cyclone chamber  184  and pre-motor filter chamber  556 , and motor inlet  1108  may be positioned at the threshold between pre-motor filter chamber  556  and suction motor housing  1138 . In alternative embodiments, one or more conduits (not shown) may separate pre-motor filter chamber  556  from cyclone chamber outlet  196  and/or motor inlet  1108 . 
     In the illustrated embodiment, pre-motor filter chamber  556  extends in length between a front end  1200  and a rear end  1204 . As shown, pre-motor filter chamber  556  may hold pre-motor filters  1176  and  1180  in the airflow path between cyclone chamber outlet  196  and motor inlet  1108  for filtering residual dirt particles remaining in the airflow. In some embodiments, pre-motor filter chamber  556  may hold pre-motor filters  1176  and  1180  in spaced apart relation to front and rear ends  1200  and  1204 . An upstream plenum  1208  may be provided in the space between upstream pre-motor filter  1176  and front end  1200 . A downstream plenum  1212  may be provided in the space between downstream pre-motor filter  1176  and rear end  1204 . Air entering upstream plenum  1208  from cyclone bin assembly  136  may distribute across the surface area of pre-motor filter  1176  for traversing filters  1176  and  1180  to downstream plenum  1212 . 
     In the illustrated embodiment, cyclone chamber outlet  196  may direct air into an upper portion of upstream plenum  1208 . For example, cyclone chamber outlet  196  may be connected to pre-motor filter chamber  556  proximate upper end  1188 . In the illustrated embodiment, motor inlet  1108  may receive air from a lower portion of downstream plenum  1212 . For example, motor inlet  1108  may be connected to pre-motor filter chamber  556  proximate lower end  1192 . Accordingly, pre-motor filter chamber  556  may be used to redirect the air from transversely to the cyclone and motor axis without requiring conduits having bends therein. 
     Battery Power 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the surface cleaning head or upright section of the surface cleaning apparatus may include one or more batteries for powering the handvac when the handvac is connected to the surface cleaning head or upright section. The handvac may also include handvac batteries which may power the handvac when connected to or disconnected from the upright section and surface cleaning head (e.g. in an above-floor cleaning mode or handvac mode). When the handvac is electrically connected to the surface cleaning head, the batteries in the surface cleaning head may supplement the batteries in the handvac or be the sole power source. 
     As exemplified in  FIG. 3 , surface cleaning apparatus  100  (or any other surface cleaning apparatus embodiment disclosed herein) may include one or more handvac batteries  1268  mounted to the handvac  112 , and one more supplemental batteries  1272 . Supplemental batteries  1272  may be mounted to any other suitable component of apparatus  100  other than handvac  112 . For example, supplemental batteries  1272  are shown mounted to surface cleaning head  104 . Alternatively or additionally, supplemental batteries  1272  may be mounted to upright section  108 . 
     As used herein, the plural term “batteries” means one or more batteries. For example, supplemental batteries  1272  may be one battery or a plurality of batteries. Similarly, handvac batteries  1268  may be one battery or a plurality of batteries. Batteries  1272  and  1268  may be any suitable form of battery such as NiCad, NiMH, or lithium batteries, for example. Preferably, batteries  1272  and  1268  are rechargeable, however, in alternative embodiments, one or both of batteries  1272  and  1268  may be non-rechargeable single-use batteries. 
     In the illustrated embodiment, when handvac  112  is connected to upright section  108 , an electrical connection may be formed between supplemental batteries  1272  and handvac  112 , e.g. for powering suction motor  204 . 
     In some embodiments, supplemental batteries  1272  may provide handvac  112  with enhanced power for generating greater suction with suction motor  204 . For example, suction motor  204  may operate in a high power consumption mode, drawing power from supplemental batteries  1272 , or supplemental batteries  1272  and handvac batteries  1268  simultaneously. 
     In some embodiments, supplemental batteries  1272  may provide the handvac  112  with extra energy for prolonged cleaning time between charges. For example, supplemental batteries  1272  may have a greater energy capacity (e.g. measured in Watt-hours) than handvac batteries  1268 , such that handvac  112  may be sustained by supplemental batteries  1272  for a longer operating time. In some embodiments, handvac  112  may draw power from both of supplemental batteries  1272  and handvac batteries  1268 , which have a greater combined energy storage capacity than handvac batteries  1268  alone. 
     In some embodiments, supplemental batteries  1272  may supply power to the handvac in preference to the handvac batteries  1268  to delay or avoid draining the handvac batteries  1268 . For example, handvac  112  may draw power from supplemental batteries  1272  until substantially depleted before drawing power from handvac batteries  1268 . This may conserve power in handvac batteries  1268  for use when handvac  112  is disconnected from supplemental batteries  1272  (e.g. in an above-floor cleaning mode, or handvac mode of apparatus  100 ). In some embodiments, handvac  112  may never draw power from handvac batteries  1268  when handvac  112  is electrically connected to supplemental batteries  1272 . 
     In some embodiments, handvac  112  may draw power from supplemental batteries  1272  to recharge handvac batteries  1268 . This may help to ensure that handvac batteries  1268  are not depleted when handvac  112  is disconnected from supplemental batteries  1272  (e.g. for use in an above-floor cleaning mode, or handvac mode of apparatus  100 ). In some cases, supplemental batteries  1272  may recharge handvac batteries  1268  only when apparatus  100  is not turned on. 
     In some embodiments, supplemental batteries  1272  may be recharged whenever the surface cleaning apparatus is connected to an external power outlet. In some cases, handvac batteries  1268  may be recharged when handvac  112  is electrically connected to an external power outlet (e.g. when surface cleaning head  104  or upright section  108  is connected to a power outlet by an electrical cord (not shown), and handvac  112  is connected to the surface cleaning head  104  or upright section  108 ). 
     In some embodiments, one or more of supplemental batteries  1272  and handvac batteries  1268  may be positioned in the airflow path. This may provide cooling for the batteries so positioned, which may help to prevent the batteries from overheating and may improve the performance of the batteries. In the illustrated example, handvac batteries  1268  are positioned in the airflow path inside motor housing  1138 . For example, handvac batteries  1268  may be positioned inside motor housing  1138  between suction motor  204  and clean air outlet  132 . The air passing over the handvac batteries  1268  may help to keep the batteries  1268  cool. 
     Supplemental batteries  1272  may be positioned in the airflow path to promote cooling of the batteries  1272 . In the illustrated example, supplemental batteries  1272  are shown positioned inside surface cleaning head  104  in the airflow path between dirty air inlet  124  and downstream end  1240 . The air passing over batteries  1272  may help to keep batteries  1272  cool. 
     In alternative embodiments, one or both of supplemental batteries  1272  and handvac batteries  1268  may be positioned outside of the airflow path (e.g. to be cooled passively). 
     Handvac Wheels 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the handvac may be provided with one or more sets of wheels, and a handle which may articulate to facilitate different cleaning postures. 
     As exemplified in  FIGS. 106-109 , surface cleaning apparatus  1292  may include a surface cleaning head  104 , an upright section  108  (which may receive any assembly  140 ,  160  discussed previously), and a handvac  112 . An airflow path through apparatus  1292  may extend from dirty air inlet  124  in surface cleaning head  104 , downstream through upright section  108  and then handvac  112  to clean air outlet  1304 . Upright section  108  may include a wand  144  having an upstream end  360  drivingly connected to a pivot joint  116  of surface cleaning head  104 , and a downstream end  364  connected to an inlet nozzle  412  of handvac  112 . 
     Handvac  112  may include an air treatment member positioned in the airflow path between inlet nozzle  412  for separating dirt from the airflow. In the illustrated example, handvac  112  includes a cyclone bin assembly  136  including a cyclone chamber  184 , and a dirt collection chamber  188 . Optionally, a bottom wall  216  of dirt collection chamber  188  may be pivotally openable for emptying dirt collection chamber  188 . 
     As exemplified, apparatus  1292  may be movable between an upright storage position ( FIG. 106 ) in which handvac  112  is substantially vertically aligned above surface cleaning head  104  and wand  144  is substantially vertically oriented, and an in-use floor cleaning position ( FIG. 108 ) in which surface cleaning head  104  is positioned behind surface cleaning head  104  and wand  144  extends at an angle to vertical. 
     In the illustrated example, apparatus  1292  may include a handle  1340 . Handle  1340  may be connected to wand  144  by an arm assembly  1344 . As shown, arm assembly  1344  may include a first arm  1348  joined to a second arm  1352  by an articulating joint  1356 . First arm  1348  may be connected to wand  144  and joint  1356 , and second arm  1352  may be connected to handle  1340 . Alternately, joint  1356  may be used to connect second arm  1352  to wand  144 . 
     As shown, first arm  1348  may be rigidly connected to wand  144 , and extend transversely to wand  144 . For example, first arm  1348  may extend perpendicularly to wand  144 . Second arm  1352  may be rotatable about joint  1356  between at least two positions. In the first position ( FIG. 108 ), second arm  1352  may extend at an angle to first arm  1348  substantially in parallel with wand  144 . In the second position ( FIG. 109 ), second arm  1352  may extend substantially parallel to first arm  1348 . An actuator (e.g., a button)  1358  may be provided on handle  1340  for toggle joint  1356  between an unlocked position in which second arm  1352  can move with respect to first arm  1348 , and a locked position in which the position of second arm  1352  is fixed with respect to first arm  1348 . Optionally, joint  1356  may be locked in a number of alternate positions. Alternately, joint  1356  may not be locked in the second bent position shown in  FIG. 109 . 
     The first position ( FIG. 108 ) may be suitable for cleaning open areas where vertical clearance is not an issue. The second position ( FIG. 109 ) may be suitable for cleaning under furniture and the like, where wand  144  must be lowered to clear the furniture height. In the second position, the orientation of second arm  1352  may permit a user to grasp handle  1340  and lower wand  144  while conveniently standing upright. 
     In some embodiments, handvac  112  may include one or more front wheels  1364 . Front wheel  1364  may be positioned to make rolling contact with a horizontal surface when wand  144  is lowered sufficiently. Thus, front wheel  1364  may assist with supporting the weight of handvac  112  and permit handvac  112  to roll across the horizontal surface. In the illustrated example, a front end  1360  of bottom wall  216  is provided with one or more front wheels  1364 . 
     It will be appreciated that if rear end of assembly  140 , 160  is tapered as discussed previously, then assembly  140 ,  160  is configured to permit the vacuum cleaner to extend further under furniture than if the assembly  140 , 160  had the depth (front to back when in an upright storage position) as the upper end of the assembly  140 ,  160 . 
     Openable Handvac Cyclone Bin Assembly 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the cyclone bin assembly of the handvac may be opened to empty the cyclone chamber and/or the dirt collection chamber, to access the pre-motor filter or access a door to open the cyclone chamber and/or the dirt collection chamber by moving part or all of the cyclone bin assembly relative to a main body of the handvac which include the suction motor while the parts remain connected together. For example, the parts may be pivotally mounted to each other. 
     Referring to  FIGS. 110 a  and 110 b   , front portion  1372  of handvac  112  may be pivotally connected to rear portion  1376  of handvac  112  for pivoting between the open position shown and a closed position. In the open position, cyclone bin assembly  136  may be accessible, e.g. for emptying or cleaning. 
     Front portion  1372  may be pivotally connected to rear portion  1376  in any suitable fashion. In the illustrated embodiment, front portion  1372  is pivotally connected to rear portion  1376  by a hinge  1380  for rotation about a hinge axis  1384  between the open and closed positions. 
     In the illustrated embodiment, front portion  1372  and rear portion  1376  separate at the interface between cyclone bin assembly  136  and pre-motor filter chamber  556 . For example, front portion  1372  may include cyclone bin assembly  136  except for second end wall  224 , and rear portion may include pre-motor filter chamber  556  and second end wall  224  of cyclone bin assembly  136 . Accordingly, in the open position, access may be provided to empty and clean dirt collection chamber  188  and cyclone chamber  184  of cyclone bin assembly  136 . 
     Referring to  FIG. 116 , in some embodiments handvac  112  may include a handle assembly  300  including handle  484  and suction motor  204 . As exemplified, handle assembly  300  and rear wall  1224  of pre-motor filter chamber  556  may be removable from (entirely, or pivotally connected to) pre-motor filter chamber  556  as a unit to access the pre-motor filters  1176  and  1180  inside pre-motor filter chamber  556 , e.g. for cleaning or replacement. As shown in  FIG. 117 , in some embodiments, handle assembly  300  may also be removably connected to rear wall  1224 . In alternative embodiments, handle assembly  300  may be permanently connected to rear wall  1224 . 
     Openable Dirt Collection Chamber 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the supplemental assembly may have a top and/or bottom openable portion. 
     As exemplified in  FIGS. 111-113 , dirt collection assembly  140  is shown including an upper portion  276  in an open position. Upper portion  276  may be moveably connected to (e.g., pivotally) or removable from dirt collection assembly  140  in any suitable manner. As exemplified, upper portion  276  may be connected to dirt collection chamber  140  by a hinge  1392  for rotation about a hinge axis  1  (not shown) between the open and closed positions. 
     Upper portion  276  may be retained in the closed position in any suitable fashion. In the illustrated example, dirt collection chamber  140  includes a latch  1400  for securing upper portion  276  in the closed position. Latch  1400  may be user operable for selectively releasing upper portion  276  for movement to the open position. 
     As exemplified in  FIGS. 114 and 115 , upright section  108  of surface cleaning apparatus  152  is shown including a cyclone bin assembly  160 . Cyclone bin assembly  160  is preferably openable for accessing cyclone chamber  308  and dirt collection chamber  141 , e.g. for cleaning or emptying. Preferably, an upper and/or lower portion of cyclone bin assembly  160  may be openable. In the illustrated embodiment, upright section  108  includes an upper portion  1408  and a lower portion  1412 . As shown, upper portion  1408  may be moveably connected to (e.g., pivotally connected to) or removable from lower portion  1412  for movement been a closed position ( FIG. 114 ) and an open position ( FIG. 115 ). 
     Upper portion  1408  may be pivotally connected to lower portion  1412  in any suitable manner. In the illustrated embodiment, lower portion  1412  is pivotally connected to lower portion  1412  by a hinge  1416  for rotation about a hinge axis  1420  between the closed and open positions. 
     Upper portion  1408  may be retained in the closed position in any suitable manner. For example, upper portion  108  may include a releasable catch for selectively securing upper portion  1408  to lower portion  1412  in the closed position. 
     Handvac Cyclone Bin Assembly Bypass 
     In accordance with another aspect of this disclosure, which may be used by itself or in combination with any one or more other aspects of this disclosure, the cyclonic air treatment member of the handvac may be bypassed when a supplemental cyclonic bin assembly is provided. This may prevent accumulation of dirt in the handvac so that the handvac may have more or all of its dirt collection capacity available when disconnected from the upright section. Alternately or in addition, a pre-motor filter of handvac  112  may be bypassed when a supplemental cyclonic bin assembly is provided. For example, the supplemental cyclonic bin assembly may be provided with a pre-motor filter. The pre-motor filter may have a larger surface area than the pre-motor filter of handvac  112 . Accordingly, by bypassing the pre-motor filter of handvac  112 , the pre-motor filter of handvac  112  may only be used in an above floor cleaning mode thereby extending the useable time of the pre-motor filter of handvac  112  before cleaning or replacement may be needed. 
     Referring to  FIGS. 99-101 , handvac  112  may include a primary airflow path  1228  and a bypass airflow path  1232 . As shown, primary airflow path  1228  may extend from air inlet  192  through cyclone bin assembly  136  to suction motor  204 , and bypass airflow path  1232  may extend from air inlet  192  to suction motor  204  bypassing cyclone bin assembly  136 . In some embodiments, bypass airflow path  1232  may extend through the pre-motor filters of pre-motor filter chamber  556 , and in other embodiments, bypass airflow path  1232  may bypass pre-motor filters of pre-motor filter chamber  556 . It will be appreciated that the cyclone and/or the pre-motor filter of the handvac may be bypassed. If both are bypassed, then the handvac may be used to provide some or all of the motive force to draw air through apparatus  168  but not any air treatment upstream of the suction motor. 
     In the illustrated embodiment, bypass airflow path  1232  is formed in part by a bypass passage  1236 . Bypass passage  1236  may have an upstream end  1238  in airflow communication with handvac inlet  416 , and a downstream end  1240  in airflow communication with motor inlet  1108 . As exemplified by the embodiment illustrated in  FIG. 101 , upstream end  1238  may be formed in a sidewall of handvac nozzle  412 , and downstream end  1239  may be formed in a wall of premotor filter chamber  556 . In some embodiments, downstream end  1239  may direct air from bypass passage  1236  into upstream plenum  1208  for routing bypass airflow path  1228  through pre-motor filters  1176  and  1180  as shown. In alternative embodiments, downstream end  1239  may direct air from bypass passage  1236  into downstream plenum  1212  for bypassing pre-motor filters  1176  and  1180 . 
     As exemplified, apparatus  168  may include a bypass valve  1240  for selectively opening and closing primary and bypass airflow paths  1228  and  1232 . Bypass valve  1240  may be positioned in any one or more of handvac  112 , wand  144 , and supplemental cyclone bin assembly  160 , and may take any suitable form. For example, in some embodiments bypass valve  1240  may include components parts positioned in two or more of handvac  112 , wand  144 , and supplemental cyclone bin assembly  108  which cooperate and interact to open and close primary and bypass airflow paths  1228  and  1232 . 
     In the illustrated embodiment bypass valve  1240  is positioned in inlet nozzle  412  of handvac  112 . Bypass valve  1240  may be movable between a first position ( FIGS. 99 and 100 ) in which bypass airflow path  1232  is closed and primary airflow path  1228  is open, and a second position ( FIG. 101 ) in which bypass airflow path  1232  is open and primary airflow path  1228  is closed. 
     As exemplified in  FIGS. 99-101 , bypass valve  1240  may include a wheel  1242 , a door  1244 , and an actuator  1246 . Wheel  1242  may be rotatably connected to nozzle  412  for rotation about its center. Door  1244  may be rigidly connected to wheel  1242  for rotation as one with wheel  1242 . For example, door  1244  and wheel  1242  may rotate together as a unit. As shown, door  1244  and wheel  1242  may be rotatable between a first position ( FIGS. 99 and 100 ) in which door  1244  seals an upstream end  1238  of bypass passage  1236 , and a second position ( FIG. 101 ) in which door  1244  seals an air inlet  192  of cyclone chamber  184 . 
     As exemplified, actuator  1246  may include an upper end  1248  connected to wheel  1242  radially outboard of the center of wheel  1242 . Actuator  1246  may be movable vertically between a lowered position ( FIGS. 99 and 100 ), and a raised position ( FIG. 101 ). As shown, moving actuator  1246  from the lowered position to the raised position may rotate wheel  1242  and door  1244  clockwise which may move door  1244  to the second position ( FIG. 101 ) in which door  1244  seals air inlet  192  of cyclone chamber  184 . Further, moving actuator  1246  from the raised position to the lowered may rotate wheel  1242  and door  1244  counter clockwise which may move door  1244  to the first position ( FIGS. 99 and 100 ) in which door  1244  seals upstream end  1238  of bypass passage  1236 . 
     In some embodiments, actuator  1246  may be biased to the lowered position ( FIGS. 99 and 100 ). Consequently, door  1244  and wheel  1242  may be biased to the first position ( FIGS. 99 and 100 ) in which door  1244  seals an upstream end  1238  of bypass passage  1236 . Actuator  1246  may be biased in any suitable fashion, such as by a linear coil spring  1250 . In alternative embodiments, wheel  1242  may be biased clockwise in a suitable manner, such as by a torsional spring. 
     Actuator  1246  may have a lower end  1252  which extends outside of the airflow path. Lower end  1252  may be acted upon to move actuator  1246  vertically from the lowered position to the raised position for opening bypass airflow path  1232  and closing primary airflow path  1228 . As shown, when handvac  112  is disconnected from wand  144  ( FIG. 99 ), bypass valve  1240  may close the bypass airflow path  1232  (e.g. under the bias of spring  1250 ). Further, when handvac  112  is connected to wand  144  without supplemental cyclone bin assembly  160  ( FIG. 100 ), bypass valve  120  may also close the bypass airflow path  1232 . In each of these cases, the air entering handvac  112  is directed through handvac cyclone bin assembly  136  to separate dirt from the airflow. This may permit handvac  112  to operate when disconnected from supplemental cyclone bin assembly  160 . 
     As shown in  FIG. 101 , when handvac  112  and cyclone bin assembly  160  are both connected to wand  144 , an upper end  1254  of cyclone bin assembly  160  (handle  1254  in the illustrated example) may push against actuator lower end  1252  thereby moving actuator  1246  upwardly. This may rotate wheel  1242  and door  1244  counter clockwise, opening bypass airflow path  1232  and closing primary airflow path  1228 . As shown, air exiting cyclone bin assembly  160  may travel through bypass airflow path  1232  toward suction motor  204  bypassing cyclone chamber  184 . This may permit supplemental cyclone bin assembly  160  to separate and collect dirt from the airflow path instead of handvac cyclone bin assembly  136 . In turn, this may inhibit dirt accumulation in handvac dirt collection chamber  188 , which may help to maximize the available dirt collection capacity of handvac dirt collection chamber  188  when the user chooses to disconnect cyclone bin assembly  160 . 
     In the illustrated example, lower end  1252  is sloped. This may permit supplemental bin assembly  160  to be toed into wand  144  and then rotated horizontally towards wand  144  to complete the connection with wand  144 , whereby the upper end  1254  of supplemental bin assembly  160  may ride the slope of lower end  1252  to push actuator  1246  upwardly. 
     Accordingly, bypass valve  1240  may be actuated to reconfigure the airflow path through handvac  112  automatically upon connecting and disconnecting supplemental bin assembly  160  from airflow communication with handvac  112 . For example, bypass valve  1240  may be biased to close bypass airflow path  1232  whenever handvac  112  is not in airflow communication with supplemental bin assembly  160  so that the air treatment member of handvac  112  may separate dirt from the airflow. Similarly, bypass valve  1240  may be configured to open bypass airflow path  1232  and close primary airflow path  1228  whenever handvac  112  is in airflow communication with supplemental bin assembly  160  so that the air treatment member of handvac  112  does not separate and store dirt from the airflow. 
     The following is a description of numerous embodiments of surface cleaning apparatus  168 . In the figures associated with some embodiments, a bypass valve  1232  and/or a diversion valve  712  may be represented schematically. It will be appreciated that the embodiments may be practiced using the bypass valves  1232  and/or diversion valves  712  described above, or other suitable valves. 
     Referring to  FIG. 102 , in some embodiments supplemental cyclone bin assembly  160  may include one or more pre-motor filters  1256  (herein after referred to as pre-motor filter  1256  in the singular) positioned in the airflow path. Preferably, pre-motor filter  1256  is positioned downstream of cyclone chamber  308 . As shown, pre-motor filter  1256  may be positioned between cyclone chamber air outlet  320  and outlet passage  476 . 
     In some embodiments, pre-motor filter  1256  may separate fine dirt particles from the airflow in substitution for the pre-motor filters  1176  and  1180  of handvac  112 . As shown, bypass valve  1232  may divert air from supplemental cyclone bin assembly  160  into a bypass airflow path which bypasses handvac cyclone bin assembly  136  and pre-motor filters  1176  and  1180 . For example, downstream end of  1239  of bypass passage  1236  may direct the bypass airflow path  1232  to downstream plenum  1212  for bypassing pre-motor filters  1176  and  1180 . 
     It will be appreciated that a pre-motor filter will have a certain filtering capacity of fine particles at which point the filter should be cleaned or replaced. By incorporating a pre-motor filter into the supplemental cyclone bin assembly  160 , and using this filter whenever the supplemental cyclone bin assembly  160  is connected to the handvac, the filtering capacity of the handvac pre-motor filters may be preserved. This may permit extended use of the handvac pre-motor filters before they require cleaning or replacement. 
     It will also be appreciated that there will be a measurable pressure drop across a pre-motor filter placed in an airflow path. If positioned in series, too many filters may produce a pressure drop that materially reduces air flow at the dirty air inlet. By filtering the airflow alternately by the supplemental pre-motor filter  1256  and by the handvac pre-motor filter when the handvac is used without assembly  140 ,  160  attached the operational life of the handvac pre-motor filter may be extended. 
     As exemplified in the alternate embodiment of  FIG. 103 , surface cleaning head  104  may include a second suction motor  1258 . Second suction motor  1258  may operate in parallel with or alternately instead of handvac suction motor  204  when handvac  112  is attached in flow communication with surface cleaning head  104 . For example, a portion of air exiting supplemental cyclone bin assembly  160  may proceed to handvac suction motor  204  and a different portion may proceed to second suction motor  1258 . In the illustrated embodiment, a second airflow path  1260  from diversion valve  712  to second suction motor  1258  is formed by an airflow conduit  1262  which connects diversion valve  712  to surface cleaning head  104 . 
     As shown, when supplemental cyclone bin assembly  160  is in airflow communication with handvac  112 , the airflow path extends through the air treatment member(s) of supplemental cyclone bin assembly  160  (e.g. cyclone chamber  308  and pre-motor filter  1256 ) and then divides into two parallel air flow paths  1232  and  1260 . Bypass airflow path  1232  directs one portion of the airflow to the handvac suction motor  204  bypassing handvac cyclone chamber  184  (and optionally bypassing handvac pre-motor filters  1176  and  1180 ), and second airflow path  1260  directs a second portion of the airflow path to the second suction motor  1258  in head  104 . 
     It will be appreciated that suction motors  1258  and  204  operating in parallel may generate greater suction at surface cleaning head  104  than any one of suction motors  1258  and  204  may generate operating alone. This may also permit supplemental cyclone bin  160  to include a pre-motor filter  1256  having greater surface area than the pre-motor filter of the handvac, where the additional pressure drop due to the use of two pre-motor filters may be compensated for by the enhanced suction generation of the parallel motors  1258  and  204 . 
     As exemplified in the alternate embodiment of  FIG. 104 a   , supplemental suction motor  160  may include a second suction motor  1258  which may operate in the same way as the embodiment of  FIG. 103 . Second suction motor  1258  may operate in parallel with handvac suction motor  204 . For example, a portion of air exiting supplemental cyclone chamber  160  may proceed to handvac suction motor  204  and a different portion may proceed to second suction motor  1258 . In the illustrated embodiment, a second airflow path  1260  from outlet passage  478  to second suction motor  1258  is formed by an airflow conduit  1262 . 
     As shown, when supplemental cyclone bin assembly  160  is in airflow communication with handvac  112 , the airflow path extends through the air treatment member(s) of supplemental cyclone bin assembly  160  (e.g. cyclone chamber  308  and pre-motor filter  1256 ) and then divides into two parallel air flow paths  1232  and  1260 . Bypass airflow path  1232  directs one portion of the airflow to the handvac suction motor  204  bypassing handvac cyclone chamber  184  (and optionally bypassing handvac pre-motor filters  1176  and  1180 ), and second airflow path  1260  directs a second portion of the airflow path to the second suction motor  1258 . 
     As shown, second suction motor  1258  may be positioned below dirt collection chamber  140  and cyclone chamber  308  of supplemental cyclone bin assembly  160 , and second suction motor  1258  may be vertically aligned above surface cleaning head  104 . This may help to lower the center of gravity of the apparatus  168  for enhanced stability against tipping. 
     In some embodiments, a pre-motor filter may be positioned in each of bypass airflow path  1232  and second airflow path  1260 , as shown. For example, a pre-motor filter  1256  may be positioned in the second airflow path  1260  between outlet passage  478  and second suction motor  1258 , and bypass airflow path  1232  may direct the airflow through handvac pre-motor filters  1176  and  1180 . In the illustrated embodiment, pre-motor filter  1256  is shown positioned below dirt collection chamber  140  of supplemental cyclone bin assembly  160 . 
     In alternative embodiments, air exiting cyclone chamber  308  may pass through a common pre-motor filter before dividing between the second airflow path  1260  and bypass airflow path  1232 . For example, in  FIG. 104 b    pre-motor filter  1256  is shown positioned downstream of cyclone chamber  308  and upstream of outlet passage  478 . As shown, bypass airflow path  1232  may bypass handvac pre-motor filters  1176  and  1180 . This may permit the filtration capacity of handvac pre-motor filters  1176  and  1180  to be preserved for use when supplemental cyclone bin assembly  160  is disconnected from airflow communication with handvac  112 . In alternative embodiments, pre-motor filters  1176  and  1180  may be positioned in the bypass airflow path  1232 . 
     As exemplified in  FIG. 105 a    dirt collection chamber  140  and cyclone chamber  308  may be removable as a sealed unit from wand  144  and second suction motor  1258 . For example, second suction motor  1258  may be mounted or removably mounted to wand  144  so that dirt collection chamber  140  and cyclone chamber  308  may be removed while second suction motor  1258  remains mounted to wand  144 . This may permit cleaning and/or emptying of dirt collection chamber  140  and cyclone chamber  308  (e.g. carrying the same to a garbage bin to dump their contents) without having to carry second suction motor  1258  (which may have a non-trivial weight). Also, assembly  160  may be removable as a unit to convert the apparatus to a lightweight or above floor operating mode. 
     As exemplified in  FIG. 118 , the air treatment members of handvac  112  and supplementary cyclone bin assembly  160  may operate in parallel. For example, handvac  112  and supplementary cyclone bin assembly  160  may separate dirt from mutually exclusive portions of the airflow entering dirty air inlet  124 . 
     In the illustrated example, wand  144  may define two airflow paths. A first airflow path  1428  may be formed by a first division of wand  144  and may direct airflow moving therein to supplemental cyclone bin assembly  160  for cleaning, and then from supplemental cyclone bin assembly  160  to bypass airflow path  1232  of handvac  112 . A second airflow path  1432  may be formed by a second division of wand  144  and may direct airflow moving therein to primary airflow path  1228  of handvac  112  for cleaning by cyclone bin assembly  136 . 
     As exemplified, dirty air entering dirty air inlet  124  may divide into two airflows at wand upstream end  360  and then travel through the first and second airflow paths  1428  and  1432 . Dirt may be separated from each airflow stream by a different one of supplementary cyclone bin assembly  160  and handvac  112 . In the illustrated embodiment, the two airflows may recombine in pre-motor filter chamber  556 . For example, the two airflows may recombine at the upstream plenum  1208  so that both airflows pass through pre-motor filters  1176  and  1180  before exiting through suction motor  204 . In alternative embodiments, the two airflows may recombine at the downstream plenum  1212 . For example, supplemental cyclone bin assembly  160  may have its own pre-motor filter for filtering the air of the first airflow path  1428 . 
     In some embodiments, surface cleaning apparatus  168  may include two or more suction motors operating in series. In one aspect, this may enhance the suction at dirty air inlet  124  and/or compensate for suction loss from additional or higher efficiency air treatment members. 
     Referring to  FIGS. 119 a  and 119 b   , a second suction motor  1258  may be positioned in the airflow path between dirty air inlet  124  and handvac  112 . For example, second suction motor  1258  may be a dirty air suction motor positioned in surface cleaning head  104 . As shown, dirty air entering dirty air inlet  124  may be drawn through second suction motor  1258  before the airflow is cleaned by supplemental dirt collection chamber  160  and/or handvac  112  and discharged through handvac suction motor  204 . 
     Referring to  FIG. 120 , second suction motor  1258  may be a clean air motor positioned downstream of handvac suction motor  204 . As exemplified, motor outlet  1112  of handvac suction motor  204  may be fluidly connected to second suction motor  1258  in surface cleaning head  104  by an airflow path  1436 . As shown, airflow path  1436  may be formed by a conduit  1440 . 
     Referring to  FIG. 121 a   , in some embodiments second suction motor  1258  may be positioned in supplementary cyclone bin assembly  160 . For example, second suction motor  1258  may be positioned below dirt collection chamber  140 . As shown, airflow path  1436  from motor outlet  1112  may direct air from suction motor  204  to second suction motor  1258  in supplementary cyclone bin assembly  160 . For example, conduit  1440  may extend from motor outlet  1112  to second suction motor  1258 . Conduit  1440  may take any suitable form. For example, conduit  1440  may be a rigid conduit as shown. Alternatively,  FIG. 121 b    shows an embodiment where conduit  1440  is a flexible hose. 
     In some embodiments, when handvac is connected with supplement cyclone bin assembly  160 , handvac  112  may not be positioned in the airflow path through the surface cleaning apparatus. For example, air entering the dirty air inlet  124  of the surface cleaning head may be cleaned by the supplementary cyclone bin assembly  160  and discharged without ever passing through handvac  112 . In this way, handvac  112  may act as a handgrip for manipulating and steering surface cleaning apparatus  168  in the upright mode but not as an air cleaning implement. 
     In some embodiment, as exemplified in  FIG. 122 , the handvac may be bypassed when assembly  160  is attached to upright section  108 . As exemplified, air entering dirt air inlet  124  may move through wand  144  to supplemental cyclone bin assembly  160  and be discharged without moving through handvac  112 . For example, the airflow path through surface cleaning apparatus  168  may direct all air from dirty air inlet  124  through wand  144  to cyclone chamber  308  to outlet passage  476  to second airflow path  1260  to suction motor  1258  of supplemental cyclone bin assembly  160 , which may discharge the air to the outside environment. 
     Still referring to  FIG. 122 , in some embodiments there may be a plurality of suction motors in series. In the illustrated embodiment, surface cleaning head  104  includes a suction motor  1258  positioned in the airflow path between dirty air inlet  124  and wand  144 . In alternative embodiments, suction motor  1258  may be the only suction motor in the airflow path. 
     While the above description provides examples of the embodiments, it will be appreciated that some features and/or functions of the described embodiments are susceptible to modification without departing from the spirit and principles of operation of the described embodiments. Accordingly, 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.