Upright vacuum cleaner

Abstract

An upright surface cleaning apparatus has a portable cleaning unit that is removably mounted to the support member. The upright surface cleaning apparatus is operable in a floor cleaning mode, in which the portable cleaning unit is mounted to the support member, and in an above floor cleaning mode, in which the portable cleaning unit, an above floor cleaning wand and a hose are concurrently removed from the support member.

Claims

1. An upright surface cleaning apparatus that is operable in a floor cleaning mode and in an above floor cleaning mode, the surface cleaning apparatus comprising in the floor cleaning mode: (a) a surface cleaning head having a dirty fluid inlet; (b) a support member moveably mounted to the surface cleaning head; (c) a suction and filtration unit comprising a suction motor, at least one cleaning stage, a housing and a clean air outlet, the housing defining an inlet to the suction and filtration unit, the housing of the suction and filtration unit engages the support member; (d) a fluid flow path extending from the dirty fluid inlet to the clean air outlet and including the suction motor and the at least one cleaning stage; (e) an above floor cleaning wand has an inlet end that is removably received in the housing whereby the above floor cleaning wand is drivingly connected to the support member; (f) a hose having an inlet end that is downstream from the above floor cleaning wand and an outlet end that is upstream of the suction and filtration unit; and, (g) a handle drivingly connected to the above floor cleaning wand, wherein the suction and filtration unit, the above floor cleaning wand and the hose are concurrently removable as a unit from the support member with the hose in fluid flow communication with the above floor cleaning wand and the suction and filtration unit, whereby in the above floor cleaning mode, the suction and filtration unit, the above floor cleaning wand and the hose have been removed from the support member, the inlet end of the above floor cleaning wand has been removed from the housing on the suction and filtration unit and the inlet end of the hose is downstream from the above floor cleaning wand and the outlet end of the hose is upstream of the suction and filtration unit, and wherein the suction and filtration unit has an upper portion having an upper portion height, a middle portion having a middle portion height and a lower portion having a lower portion height, and the upper portion height, the middle portion height and the lower portion height are approximately equal and, wherein the portion of the housing that engages the support member is located at the middle portion of the suction and filtration unit.

2. The upright surface cleaning apparatus of claim 1 wherein the support member comprises an up flow duct.

3. The upright surface cleaning apparatus of claim 2 wherein the support member is removably receivable in the housing.

4. The upright surface cleaning apparatus of claim 1 wherein the support member is removably receivable in the housing.

5. The upright surface cleaning apparatus of claim 1 wherein the inlet end of the hose is located adjacent the handle.

6. The upright surface cleaning apparatus of claim 1 wherein, when the suction and filtration unit is mounted to the support member and the support member extends generally vertically, the housing is located at an elevation of an inlet of the at least one cleaning stage.

7. The upright surface cleaning apparatus of claim 1 wherein, the housing includes an air flow passage extending between the hose and the inlet to the at least one cleaning stage wherein the air flow passage extends generally horizontally when the suction and filtration unit is mounted to the support member and the support member extends generally vertically.

8. The upright surface cleaning apparatus of claim 1 wherein, when the suction and filtration unit is mounted to the support member and the inlet end of the above floor cleaning wand is mounted to the housing, the above floor cleaning wand and the support member are vertically aligned.

9. The upright surface cleaning apparatus of claim 8 wherein, when the suction and filtration unit is mounted to the support member and the inlet end of the above floor cleaning wand is mounted to the housing, the hose is located rearward of the above floor cleaning wand.

10. The upright surface cleaning apparatus of claim 9 wherein the inlet end of the wand is removable from the housing when the suction and filtration unit is mounted to the support member.

11. The upright surface cleaning apparatus of claim 1 wherein, when the suction and filtration unit is mounted to the support member and the inlet end of the above floor cleaning wand is mounted to the housing, the hose is located rearward of the above floor cleaning wand.

12. The upright surface cleaning apparatus of claim 1 wherein the inlet end of the wand is removable from the housing when the suction and filtration unit is mounted to the support member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) These and other advantages of the instant invention will be more fully and completely understood in accordance with the following drawings of the preferred embodiments of the vacuum cleaner in which:

(2) FIG. 1 is a perspective view of an upright vacuum cleaner according to a first embodiment of the instant invention;

(3) FIG. 2 is a front elevational view of the vacuum cleaner of FIG. 1;

(4) FIG. 3 is a rear elevational view of the upright vacuum cleaner of FIG. 1;

(5) FIG. 4 is a top plan view of the upright vacuum cleaner of FIG. 1;

(6) FIG. 5 is a side elevational view of the upright vacuum cleaner of FIG. 1;

(7) FIG. 6 is an exploded view of the upright vacuum cleaner of FIG. 1;

(8) FIG. 7 is an exploded view of an alternate embodiment of the vacuum cleaner of FIG. 1;

(9) FIG. 8 is an exploded view showing a plurality of different components which are interchangeable and may be utilized to custom design different vacuum cleaners using common components;

(10) FIG. 9 is a perspective view of an alternate embodiment of a vacuum cleaner which may be constructed using the components of FIG. 8;

(11) FIG. 10 is a further alternate embodiment of a vacuum cleaner which may be constructed using the components of FIG. 8;

(12) FIG. 11 is a further alternate embodiment of a vacuum cleaner which may be constructed using the components of FIG. 8;

(13) FIG. 12 is a further alternate embodiment of a vacuum cleaner which may be constructed using the components of FIG. 8;

(14) FIG. 13 is a side elevational view of the vacuum cleaner of FIG. 1 wherein the dirt chamber is slidably mountable on the cyclone housing and separately removable from the vacuum cleaner;

(15) FIG. 14 is a perspective view of FIG. 13;

(16) FIG. 15 is a longitudinal section through the upper casing of the vacuum cleaner of FIG. 13;

(17) FIG. 16 is a top plan view of the dirt chamber of FIG. 13 with the separation plate shown in the horizontal position;

(18) FIG. 17 is a top plan view of the dirt chamber of FIG. 13 with the separation plate shown in a raised position;

(19) FIG. 18 is a cross section through the cyclone housing and dirt chamber shown in FIG. 15 with the air flow pattern shown therein;

(20) FIG. 19 is a cross section through an alternate cyclone housing and dirt chamber showing the air flow pattern therein;

(21) FIG. 20 is a partial longitudinal sectional view through a rotatably mounted brush for a surface cleaning head wherein the brush drive motor is mounted internally inside the rotatably mounted brush;

(22) FIG. 21a is an exploded view of a cyclone housing showing an iris for the outlet of the cyclone chamber in a first position;

(23) FIG. 21b is an exploded view of the cyclone housing and dirt chamber of FIG. 24a showing the iris in a second position;

(24) FIG. 22a is a cross section through an alternate cyclone housing and dirt chamber showing an adjustable height plate at a first position;

(25) FIG. 22b is a cross section through the same cyclone housing and dirt chamber as in FIG. 22a wherein the plate has been adjusted to be closer to the dirt outlet of the cyclone;

(26) FIG. 22c is a perspective view of the cyclone housing of FIG. 25a with the cyclone chamber removed;

(27) FIG. 22d is a perspective view from above of the cyclone housing of FIG. 22c;

(28) FIG. 22e is a perspective view of the cyclone housing of FIG. 25 with the separation plate removed;

(29) FIG. 23 is a cross section through an alternate cyclone housing and dirt chamber wherein the configuration of the plate is adjustable;

(30) FIG. 24 is a perspective view of an upright vacuum cleaner in accordance with a further alternate embodiment of the instant invention wherein a valve is provided for adjusting the vacuum cleaner from a floor cleaning mode to above floor cleaning mode;

(31) FIG. 25 is a cross section through the cyclone housing and dirt chamber of the vacuum cleaner of FIG. 24 wherein the vacuum cleaner is in the floor cleaning mode;

(32) FIG. 26 is a side elevational view of the vacuum cleaner of FIG. 25 in partial section showing the air flow from the surface cleaning head to the cyclone inlet;

(33) FIG. 27 is a cross section through the cyclone housing and dirt chamber of the vacuum cleaner of FIG. 26 wherein the vacuum cleaner is in the above floor cleaning mode;

(34) FIG. 28 is a side elevational view of the vacuum cleaner of FIG. 29 showing the air flow from the inlet of the cleaning wand to the cyclone inlet;

(35) FIG. 29 is a perspective view of a vacuum cleaner in accordance with another embodiment of the instant invention having a shoulder strap and wherein the upper section has been removed from the cleaning head and handle extension and is used in the above floor-cleaning mode.

DETAILED DESCRIPTION OF THE INVENTION

(36) Referring to FIGS. 1-5 an embodiment of a surface cleaning apparatus 10 of the present invention is shown. Surface cleaning apparatus 10 is an upright vacuum cleaner, and comprises a surface cleaning head 12 and an upper section 14. A dirty fluid inlet 16 is provided in the surface cleaning head 12, and a fluid flow path extends from the dirty fluid inlet 16 to a clean air outlet 18 of the surface cleaning apparatus 10. The fluid flow path includes a suction motor 20 and at least one cleaning stage 22. In the embodiments shown, a support member or spine 24 is mounted to the surface cleaning head 12, and a mounting member 26 is mounted to the support member. At least two operating components of the surface cleaning apparatus 10 are mounted directly or indirectly to the mounting member. Accordingly, the support member supports the upper section 14 on the surface cleaning head 12.

(37) In the embodiments shown, fluid enters surface cleaning head via dirty fluid inlet 16 in surface cleaning head 12, and is directed upwards into the at least one cleaning stage via an upflow duct 28. In some embodiments, as shown, support member 24 comprises upflow duct 28. That is, support member 24 provides fluid communication between surface cleaning head 12 and upper section 14. In other embodiments, upflow duct 28 may be a separate member. For example, upflow duct 28 may be a conduit that is affixed to support member 24. In the embodiments shown, support member 24 is pivotally mounted to surface cleaning head 12 via a pivoting connector 30. Accordingly, upper section 14 is pivotally mounted to surface cleaning head 12.

(38) In the embodiments shown, support member 24 extends upwardly towards mounting member 26. Mounting member 26 serves as a support to which at least two operating components of the upright surface cleaning apparatus 10 are mounted. In the preferred embodiment, cleaning stage 22 is directly or indirectly mounted to mounting member 26, as will be described further hereinbelow. In a further preferred embodiment, cleaning stage 22 and suction motor 20 are directly or indirectly mounted to mounting member 26. In other embodiments, other operating components, such as a filter assembly or another cleaning stage, may be mounted to mounting member 26. In some embodiments, mounting member 26 may be integrally formed with support member 24. In other embodiments, as shown in FIGS. 21-22, mounting member 26 may be integrally formed a component of upper section 14, for example cyclonic cleaning stage 22. In other embodiments, mounting member 26 may be a separate member. As exemplified, mounting member may have a fluid flow path therethrough (see for example FIG. 7) or it may not include a fluid flow path therethrough.

(39) In embodiments wherein support 24 comprises upflow duct 28, mounting member 26 may further serve to connect support 24 in fluid communication with cyclonic cleaning stage 22. That is, mounting member 26 may comprise an airflow passage 31 (shown in FIGS. 7, 8, 21-22, and 23-28). In alternate embodiments (not shown), a mounting member may not be provided, and support 24 may be mounted directly to cyclonic cleaning stage 22. In further alternate embodiments, wherein upflow duct 28 is a separate member, a mounting member may not be provided, and upflow duct 28 and support 24 may be mounted directly directly to cyclonic cleaning stage 22.

(40) In the embodiments shown, air passes from support 24, into mounting member 26, and from mounting member 26 into cleaning stage 22. In the embodiments shown, cleaning stage 22 is a single cyclonic cleaning stage 22, which is provided in cyclone housing 32 having a longitudinally extending outer surface. In some embodiments, housing 32 is transparent or translucent, such that a user may view the interior thereof. Air enters cyclonic cleaning stage 22 via inlet 23, which, in the embodiments shown is provided in an upper part of cyclonic cleaning stage 22. In some embodiments, prior to entering inlet 23, the air may be directed along the exterior of cyclonic cleaning stage 22, such that air enters cyclonic cleaning stage 22 in a tangential direction. For example, as can be seen in FIG. 5, mounting member 26 comprises a portion 29 extending along cyclonic cleaning stage 22. In alternate embodiments, wherein a mounting member is not provided, a portion of upflow duct 28 may extend externally along cyclonic cleaning stage 22 towards inlet 23. In cyclonic cleaning stage 22, dirt is separated from air, and passes through outlet 35 into dirt chamber 34, which is provided below cyclonic cleaning stage 18.

(41) In some embodiments, a plate 37 may be positioned adjacent outlet 25. It will be appreciated that plate 37 may be positioned at any height in dirt chamber 34. Preferably, plate 37 is positioned proximate the top of dirt chamber 34 and proximate dirt outlet 25 from cyclone housing 32. Accordingly, as shown in FIG. 15, essentially the entire volume of dirt chamber 34 is available to function as dirt collection chamber 34. Preferably, plate 37 is positioned inwards from an inner wall of dirt collection chamber 34, except for the portion of the inner wall to which plate 37 may be attached, so as to define an annular gap between the outer wall of plate 37 and the inner wall of dirt chamber 34. Preferably, the minimum distance between plate 37 and cyclone housing 32 or dirt chamber 34, is at least as large as the largest dimension of the cyclone inlet 23. For example, if the cyclone inlet 23 has a 1 inch diameter, then the minimum distance between plate 37 and cyclone housing 32 or dirt chamber 34 is preferably is 1 inch or larger. An advantage of such a design is that any dirt particle that enters the cyclone housing 32 will be able to pass through the gap into dirt collection chamber 34. The distance between the top of plate 37 and the bottom of the cyclone housing may be 0.01-2.5 inches and is preferably at least the largest diameter of the cyclone inlet.

(42) In some embodiments, the plate 37 may be removable with dirt chamber 34 from surface cleaning apparatus 10, as will be described further hereinbelow (see for example the embodiment of FIG. 6). An advantage of this design is that plate 37 defines a partial cover for the dirt collection chamber 34. Alternately, as shown in the embodiment of FIG. 7, plate 37 may remain in position when dirt chamber 34 is removed. In such an embodiment, plate 34 is preferably attached to the bottom of cyclone housing 32

(43) In a particularly preferred embodiment, as exemplified in FIGS. 16 and 17, plate 37 is pivotally mounted to the inner wall of cyclone chamber 34. Accordingly, plate 37 may be in the horizontal or closed position shown in FIG. 16 when surface cleaning apparatus 10 is in use and when dirt chamber 34 is removed from the vacuum cleaner. When dirt collection chamber 34 is inverted for emptying, plate 37 may pivot to an open position (as exemplified in FIG. 17) due to gravity. If plate 37 is pivotally mounted to the inner wall of chamber 34, then the annular gap is preferably at least one inch. Such a configuration permits plate 37 to pivot open to permit dirt to be emptied out of chamber 34 when chamber 34 is inverted.

(44) In some embodiments, plate 37 may have the same diameter as the cyclone dirt outlet 25. Accordingly, if the cyclone housing 32 is cylindrical, then the diameter of plate 37 may be the same as the diameter of the cyclone. Alternately, a shown in FIG. 19, if the cyclone is conical, plate 37 may have the same diameter as the outlet 25 of cyclone housing 34. Alternately, plate 37 may have a larger diameter, as shown in FIG. 18. It will be appreciated that if the cyclone is conical, then plate 37 may have a diameter that is equal to the projected diameter of a end of the cone that is projected to the top of plate 37.

(45) Referring back to FIGS. 1-5, surface cleaning apparatus 10 further comprises a filter assembly 36 provided downstream from cleaning stage 22. In the embodiments shown, filter assembly 36 is housed in filter housing 38. In alternate embodiments (not shown), filter assembly may be provided in the cyclone housing 32. From cyclonic cleaning stage 22, air passes out of outlet 27 upwardly and through filter assembly 36. The air exits filter assembly 36 and is directed to motor 20, which is housed in housing 40. In the embodiments shown, motor 20 is provided on upper section 14, adjacent and above filter assembly 36. In alternate embodiments, motor 20 may be provided in cleaning head 12. In either embodiment, motor 20 is provided downstream from the cleaning stage 22. Accordingly, a downflow duct may be provided between upper section 14 and surface cleaning head 12. In some embodiments, support member 24 may comprise the downflow duct. In other embodiments, the downflow duct may be a separate member.

(46) In alternate embodiments, cleaning unit may be otherwise configured. For example, upper section 14 may comprise a second cleaning stage (not shown) positioned above cleaning stage 22 and including a plurality of cyclones in parallel. furthermore, in some embodiments, cleaning unit may comprise no filter assemblies, or more than one filter assembly.

(47) As previously mentioned, in one optional aspect a mounting member 26 serves to provide a support to which operating components, preferably at least two operating components, of the upright surface cleaning apparatus are directly or indirectly mounted. In the preferred embodiment, one of the operating components comprises cleaning stage 22. In a further preferred embodiment, the other of the operating components comprises suction motor 20. Preferably, suction motor 20 and/or cleaning stage 22 are removably mounted to mounting member 26. In some embodiments, mounting member 26 further serves to connect upflow duct 28 in fluid communication with cyclonic cleaning stage 22. It will be appreciated that, in accordance with this aspect, any construction may be used for the operating components. For example, any cyclonic cleaning stage or stages and/or any filtration member known in the surface cleaning art may be used.

(48) Referring to FIGS. 6 and 7, in the embodiments shown, mounting member 26 comprises a body 42 having an upper portion 44 and a lower portion 46. Lower portion 46 defines an opening 48 for receiving an upper end 50 of support member 24. Upper end 50 of support member 24 may be securely mounted in opening 48 by any means, such as by an adhesive, a friction fit, a set screw or the like. In embodiments wherein support member 24 comprises upflow duct 28, opening 48 may be in fluid communication with a cyclone chamber inlet 23. In the embodiment shown, the upper portion 44 of mounting member 24 comprises a second opening 52. Second opening 52 receives a lower end 54 of a handle extension 55, which supports handle 56. Lower end 54 may be secured in second opening 52 by any means known in the art.

(49) Mounting member 26 further comprises a portion 57 for receiving one or more operating components of surface cleaning apparatus 10. For example, as shown in FIG. 7, mounting member 26 is provided with a securing ring 58. Securing ring 58 provides a member to which one or more operating components may be mounted, preferably removably mounted. For example, in the embodiments shown in FIGS. 1-14, upper section 14 may be assembled by positioning filter housing 38 above securing ring 58, and positioning cleaning stage housing 32 below ring 58. Filter housing 38 and cleaning stage housing 32 may then be secured together, preferably removably secured together, for example by using screws, a bayonet mount, or a screw thread. In alternate embodiments, filter housing 38 and cleaning stage 32 may be permanently secured together, for example by using an adhesive or welding.

(50) Motor housing 40 may then be mounted to filter housing 38, for example by using by using screws, a bayonet mount, a screw thread, or an adhesive or welding. Preferably motor housing 40 is removably mounted to filter housing 38. Additionally, dirt chamber 34 may be mounted, preferably removably mounted, to cleaning stage 22. Accordingly, in this embodiment, the first cleaning stage 22 is directly mounted to mounting member 26, and motor 20 is indirectly mounted to mounting member 26.

(51) In other embodiments, operating components of surface cleaning apparatus 10 may be mounted to mounting member 26 in another manner. For example, in one embodiment (not shown), mounting member 26 may comprise a bracket to which filter housing 38 may be mounted, for example by using screws. Cleaning stage housing 32 may then be mounted to filter housing, without contacting mounting member 26. Dirt chamber 34 may then be mounted to cleaning stage housing 32, and motor housing 40 may be mounted above filter housing 38. Accordingly, in this embodiment, both of first cleaning stage 22 and motor 20 are indirectly mounted to mounting member 26.

(52) In another embodiment (not shown), motor housing 40 may be positioned above securing ring 58, and filter housing 38 may be positioned below securing ring 58, and motor housing 40 and filter housing 38 may be secured together, for example using screws. Cleaning stage housing 32 may then be mounted below filter housing 38, for example using screws, and dirt chamber 34 may be mounted below dirt chamber 34. Accordingly, in this embodiment, motor 20 is directly mounted to mounting member 26, and cleaning stage housing 22 is indirectly mounted to mounting member 26. In other embodiments, as previously mentioned, motor 20 may be provided on surface cleaning head 12. Accordingly, in such embodiments, motor 20 may not be mounted to mounting member 26 at all.

(53) In yet another embodiment, a second cleaning stage (not shown) may be provided, and may be positioned above securing ring 58. First cleaning stage 22 may be positioned below securing ring 58, and may be secured to the second cleaning stage.

(54) It will be appreciated that, in alternate embodiments, upper section 14 may have the units arranged in a different order. For example, motor housing 40 need not be provided on top of filtration housing 38. Instead, motor housing 40 could be provided beneath dirt chamber 34.

(55) In the above embodiments, dirt chamber 34 is preferably removably mounted to cleaning stage 22, such that a user may empty dirt chamber 34. For example, referring to FIGS. 13 and 14, cleaning stage housing 32 comprises flanges 61 at a lower end thereof which provide slots 60. Dirt chamber 34 comprises a rim 62, which may be slidably received in slots 60. Dirt chamber 34 further comprises a handle 63, for gripping dirt chamber 34. In some embodiments, plate 37 may be removable with dirt chamber 34 from surface cleaning apparatus 10 (see for example the embodiment of FIG. 6). An advantage of this design is that plate 37 defines a partial cover for the dirt collection chamber. Alternately, as shown in the embodiment of FIG. 7, plate 37 may remain in position when dirt chamber 34 is removed.

(56) One advantage of the embodiments described above is that the volume of the upright vacuum cleaner may be reduced. In particular, in the embodiments shown, a housing is not provided for receiving upper section 14. That is, the outer surfaces of one or more of cleaning stage 22, motor housing 40, filter housing 38, and dirt chamber 34 may be visible when surface cleaning apparatus is in use (except for the portions facing support member 24, handle extension 55, and/or the upflow duct). Accordingly, the overall volume of the vacuum cleaner is reduced. In addition, the weight of the vacuum cleaner is also substantially reduced. In particular, the amount of plastic that is typically used to construct an upper casing of a cyclonic vacuum cleaner that receives a removable cyclone chamber or dirt chamber substantially increases the weight of the vacuum cleaner. In the embodiments shown, surface cleaning apparatus 10 may weigh 10 lbs. or less (without the cord) and, preferably less than 8 lbs.

(57) A further advantage of the embodiments shown is that, if the elements of upper section 14 are removably mounted to each other and to mounting member 26, the upper section 14 may be easily disassembled for cleaning. In addition, if a component needs to be replaced, the user may merely acquire the required component (e.g. by purchasing it at a store or on line) and replace the faulty component. For example, if motor 20 fails, pursuant to a warranty plan, the manufacturer may merely ship the required motor housing 40 and motor 20 to the customer who may remove (e.g., unscrew) the motor housing 40 having the faulty suction motor 20 and replace it with the new replacement part.

(58) A further advantage of this design is that filter assembly 36 may be accessed for removal (for cleaning or replacement) by disassembling a portion of upper section 14. For example, in the embodiments of FIGS. 6 and 7, filter assembly 36 may be accessed by removing motor housing 40 from upper section 14. Accordingly, a door or the like is not required in filter housing 38, thereby simplifying the construction of filter housing 38.

(59) A further advantage of this modular construction is that alternate vacuum cleaners may be created by selecting alternate components for upper section 14 and/or alternate surface cleaning heads 12. For example, referring to FIG. 8, a plurality of upright vacuum cleaners may be designed by utilizing alternate motor housings 40, 40′, cleaning stage housings 32, 32′, dirt chambers 34, 34′, and surface cleaning heads 12, 12′.

(60) In some embodiments, a plurality of different motor casings 40, cleaning stage housings 32, dirt chambers 34, and cleaning heads 12 are provided. In addition, a plurality of handles 56 may be provided. Accordingly, a plurality of vacuum cleaners having a different appearance may be prepared by selecting particular components. For example, as shown in FIG. 9, surface cleaning apparatus 10 utilizes the same components as the vacuum cleaner of FIG. 1 except that a different dirt chamber 34 and a different surface cleaning head 12 are utilized. Accordingly, surface cleaning apparatus 10 has a different appearance. Similarly, with respect to FIG. 10, a different motor housing 40 and surface cleaning head 12 are utilized to create a vacuum cleaner of a different appearance to that of FIG. 1.

(61) In accordance with another aspect of this invention, which may be use by itself or with any other aspect, an above floor cleaning assembly 64 is provided (see for example FIG. 11). In this embodiment, surface cleaning apparatus 10 comprises first 16 and second 17 (shown in FIG. 28) dirty fluid inlets, which are selectively connectable in fluid flow communication with cleaning stage 22. Surface cleaning apparatus 10 may be converted from a floor cleaning mode (FIGS. 25 and 26) to an above floor cleaning mode (FIGS. 27, and 28) by rotating an airflow valve 66 provided in mounting member 26. In the floor cleaning mode, valve 66 connects upflow duct 28 to cyclone inlet 23 such that air travels from first dirty fluid inlet 16 in surface cleaning head 12 to cyclone inlet 23. When valve 66 is rotated to the other position, and handle extension 55 is removed from mounting member 26, air travels from second dirty fluid inlet 17 through handle extension 55, to flexible hose 68, and past valve 66 to cyclone inlet 23. Accordingly, in this embodiment, the first 16 and second 17 dirty fluid inlets are respectively in flow communication with first 71 and second 73 airflow passages, which merge at a position proximate the inlet of the first cyclonic cleaning stage 22. One advantage of this design is that a simplified structure for converting a surface cleaning apparatus 10 to an above cleaning mode is provided. In addition, as valve 66 is provided in mounting member 26, and therefore a few feet above the floor, then a user need not bend down to rotate valve 66 between the floor cleaning position and the above floor cleaning position. In other embodiments, valve 66 may be affixed to the handle 56 or support member 24.

(62) In accordance with another aspect of this invention, which may be used by itself or with any other aspect or aspects, surface cleaning apparatus 10 is convertible to a portable surface cleaning apparatus. That is upper section 14 is convertible to a portable cleaning and suction unit. Referring to FIG. 29, surface cleaning apparatus 10 is provided with a shoulder strap 70. In order to convert the surface cleaning apparatus 10 to a portable surface cleaning apparatus, the user may unwind shoulder strap 70 and extend it across their shoulder. Upper section 14, including mounting member 26, may be removed from support member 24 by, for example, actuating a release catch which secures handle 56 in opening 52, and lifting upper section 12 off of support member 24 using a handle on top of motor housing 40. Accordingly, upper section 14 is converted to a portable cleaning and suction unit 14.

(63) In any of the above embodiments, as exemplified in FIG. 20, surface-cleaning head 12 includes a rotatably mounted brush 74. Rotatably mounted brush 74 includes a central hub 76 with a plurality of bristles 78 extending outwardly therefrom. In accordance with this aspect, it is preferred that central hub 76 is at least sufficiently hollow to receive brush drive motor 80 therein. Accordingly, if brush drive motor is non-rotatably mounted in central hub 76, and if axles 82 are rotatably mounted in bearings in surface cleaning head 12, then when brush drive motor 80 is engaged, the rotation of brush drive motor 80 will cause brush 74 to rotate. Brush drive motor may be non-rotatably mounted in hub 76 by, e.g., a friction fit, a set screw or an adhesive.

(64) In some embodiments, the vacuum cleaner may be reconfigurable to adapt the vacuum cleaner to collect a different types of particulate matter. For example, it may be desirable to utilize the vacuum cleaner to collect dry wall dust. Accordingly, the vacuum cleaner may be reconfigurable in one of several ways. Referring to FIGS. 22a-22d, according to one option, lever 84 is drivingly connected to plate 37 so as to adjust the position of plate 37 with respect to outlet 25. Accordingly, if the vacuum cleaner is to be utilized to collect standard household dust including dog hair, then the lever 84 may be moved to a first position, which is better suited for collecting such material. However, if the vacuum cleaner is then going to be used to collect, for example, dry wall dust, the lever 84 may be used to a second position wherein plate 37 is at a distance from outlet 25 that is more suited for the collection of dry wall dust. In a particularly preferred embodiment, a scale or labeled positions may be provided on the outer surface of housing 32 to indicate the preferred position of lever 84 for different types of dust. Accordingly, in order to reconfigure surface cleaning apparatus 10 for a particular type of dirt, a user may merely move lever 84 to a pre-marked position. It will be appreciated that lever 84 may operate in a variety of ways, each of which is within the scope of this description. For example, lever 84 may be slidably mounted in a vertical direction so that as lever 84 is moved upwardly or downwardly, plate 37 is also moved upwardly or downwardly. Alternately, a gear or crank mechanism may be utilized such that as lever 84 is moved sideways or rotated, the height of plate 37 is adjusted.

(65) Alternately, it will be appreciated that plate 37 may be removably mounted, either to dirt chamber 34 or cyclone housing 32 (as exemplified in FIG. 22e). Accordingly, a plate having a different configuration, e.g., convex as exemplified in FIG. 23, may re selectively inserted. Alternately, as exemplified in FIG. 23, a control 90 may be provided which, when actuated, will cause plate 37 to change its configuration. For example, a plurality of cables may extend underneath plate 37 and be connected to a take up reel, which is driven by rotation of control 90. Accordingly, when control 90 is turned and draws the cable onto the reel, plate 37 will deform to a position shown in FIG. 26. When control 90 is rotated in the opposite direction, the elasticity of plate 37 will cause it to revert to its original shape (e.g. flat).

(66) In some embodiments, the size of dirt outlet 25 may be variable. For example, as shown in FIGS. 21a and 21b, an iris 86 may be provided. The size of the opening 25 defined by iris 86 may be controlled by adjustable lever 88. The outer surface of cyclone housing 32 may have a scale provided thereon, or labeled positions defining the preferred position for lever 88 (and accordingly the size of opening of iris 86) for different types of dirt.

(67) 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.