Vacuum cleaner dustcup and conduit construction
An upright vacuum cleaner having a housing with a handle at an upper end and a base at the bottom end. The base is pivotally attached to the housing and has a floor inlet nozzle facing generally downwardly from it. A dustcup assembly is associated with at least one of the housing and the base, and includes a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit formed separately from the bottom wall and attached to the bottom wall at the dustcup outlet. The fluid conduit extends into the interior space defined by the sidewall. The vacuum cleaner also has a vacuum source associated with at least one of the housing and the base. The vacuum source is adapted to create a working air flow that enters the floor inlet nozzle, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
The present invention relates to vacuum cleaners, and more particularly, to a bagless dust cup assembly to be used with a vacuum cleaner apparatus in lieu of a disposable dirt collection bag.
BACKGROUND OF THE INVENTIONFloor cleaning devices, such as vacuums, have been produced in the prior art. These prior art devices are typically provided in canister, upright, hand-held and other portable configurations, and may be powered by an electrical cord or by batteries. In many cases, the device is provided with a bagless dustcup assembly that utilizes a cyclonic separation action and/or one or more filters to facilitate separation of the vacuumed debris and air. These bagless dustcup assemblies generally include, for example, a separation chamber having a dirty air inlet, a dirt separation system including a cyclone and/or a filter, and at least one outlet for removing cleaned air. In some cases the outlet may comprise a conduit passing through the chamber itself. Various systems for emptying dirt from the separation chamber are known in the art, such as an openable lower door, a dustbin located at the bottom of the separation chamber, or a removable lid that covers and may form part of the separation chamber.
Known bagless dustcup assemblies are often formed of a single integrated piece of plastic comprising a cup-like arrangement of walls. In some cases, a fluid conduit may be formed as part of this cup. An example of such a device is shown in U.S. Pat. No. 6,141,826, in which an outlet conduit is shown as being integrally molded with a cyclone chamber dustcup. While the outlet is often through the bottom of the cup, it may alternatively exit through the lid. For example, one such device is shown in European Patent Application EP 0 728 435, in which a clean air outlet is shown molded with the cyclone chamber lid. Other conduits may be integrally formed to the outside of dirt-receiving portion of the bagless dustcup, such as in U.S. Pat. No. 5,779,745, which shows an integrally-molded outlet conduit, and U.S. Pat. No. 6,168,641, which shows an integrally-molded inlet conduit. All of the foregoing patents are incorporated herein by reference.
The prior art also discloses devices in which an outlet conduit is formed separately from the cyclone chamber, and attached thereto. For example, U.S. Pat. No. 2,684,125 shows an outlet conduit that appears to be welded or otherwise bonded to a cyclone chamber. U.S. Pat. No. 6,902,596 also discloses that an outlet conduit may be welded or removably attached to a cyclone chamber by mechanical locking means, but does not illustrate or describe how these locking means would operate. U.S. Pat. No. 6,578,230, discloses a outlet and bottom wall that are integrally formed with one another, and attached to the side wall of the cup by threaded engagement. While such threaded engagement may be useful to initially attach the two parts, it is likely that manufacturing tolerances and friction between the parts will make repeated disassembly and reassembly of the parts difficult. Furthermore, the presence of fine particles may rapidly deteriorate the integrity of the threads, as well as add to the difficulty in separating and joining the parts. The foregoing patents are incorporated herein by reference.
While the known cyclone chamber designs can be useful for providing dirt separation for vacuum cleaners and the like, the present inventors have discovered new and useful alternative cyclone chamber construction techniques to supplement and advance the prior art.
SUMMARY OF THE INVENTIONThe present invention provides, in a first aspect, an upright vacuum cleaner having a housing with a handle at an upper end and a base at the bottom end. The base is pivotally attached to the housing and has a floor inlet nozzle facing generally downwardly from it. A dustcup assembly is associated with at least one of the housing and the base, and includes a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit formed separately from the bottom wall and attached to the bottom wall at the dustcup outlet. The fluid conduit extends into the interior space defined by the sidewall. The vacuum cleaner also has a vacuum source associated with at least one of the housing and the base. The vacuum source is adapted to create a working air flow that enters the floor inlet nozzle, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
In a second aspect, the present invention provides a vacuum cleaner with a housing, one or more air inlet nozzles associated with the housing, and a dustcup assembly associated with the housing. The dustcup assembly has a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit formed separately from the bottom wall and releasably attached to the bottom wall at the dustcup outlet, the fluid conduit extending into the interior space defined by the sidewall. The vacuum cleaner also has a vacuum source associated with the housing, which is adapted to create a working air flow that enters the one or more inlet nozzles, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
In a third aspect, the present invention provides a vacuum cleaner having a housing, one or more air inlet nozzles associated with the housing, and a dustcup assembly associated with the housing. The dustcup assembly includes a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit attached to the bottom wall at the dustcup outlet, the fluid conduit extending into the interior space defined by the sidewall. The fluid conduit and at least a portion of the bottom wall form a combined conduit/bottom wall part that is formed separately from the sidewall and attached thereto. The vacuum cleaner also includes a vacuum source associated with the housing. The vacuum source being adapted to create a working air flow that enters the one or more inlet nozzles, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
In various embodiments of the foregoing aspects of the invention, the fluid conduit or combined conduit/bottom wall part may be attached by screws, a rotating cam lock arrangement, one or more flexible latching tabs, snap-fit engagement, an interference fit, bayonet fittings, or a fastening ring. The conduit/bottom wall part may also be attached by a fastener that does not include threads formed on the conduit/bottom wall part itself. A gasket may be interposed between the fluid conduit and the bottom wall or between the conduit/bottom wall part and the sidewall. The fluid conduit may have an airfoil cross-section, one or more integrally formed contours to assist with dust separation, or one or more integrally formed airflow deflectors. The fluid conduit may also comprise a first section having a first geometric profile, and a second section having a second geometric profile that is different from the first geometric profile. The bottom wall may have an additional dustcup outlet with an additional fluid conduit attached to this outlet and extending into the interior space defined by the sidewall. The dustcup assembly may be releasably attached to the housing, with the dustcup lid formed by the housing or as a separate part that is removable with the dustcup assembly from the housing. Also, the dustcup inlet may pass through the lid or the sidewall. Finally, the fluid conduit or combined conduit/bottom wall part may or may not be releasably attached.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention provides an improved cyclonic separation chamber for cleaning devices. Embodiments of the present invention may be used with any type of vacuum cleaning device, including, but not limited to, upright vacuum cleaners, canister vacuum cleaners, wet extractors, hand-held vacuum cleaners, so-called “stick” vacuum cleaners, and so on. The implementation of the present inventions with such devices will be within the understanding and skill of persons of ordinary skill in the art after review of the present disclosure and with routine experimentation with the present invention.
An example of a conventional upright vacuum cleaner to which the present invention may be applied is shown in
Referring now to
In the cyclone assembly of
Prior art cyclone assemblies are operatively associated with vacuum cleaners in a variety of ways. For example, all or part of the cyclone assembly 200 may be formed as part of the vacuum cleaner's base 102 or rear housing 104 (or canister, in the case of canister-style vacuum cleaners), and intended to remain attached thereto during operation and emptying. However, in many instances the cyclone assembly 200, or portions thereof, is selectively removable from the rest of the vacuum cleaner. For example, referring to
In other devices, such as in U.S. Pat. Nos. 6,579,334 and 6,910,245, which are incorporated herein by reference, the cyclone assembly lid is formed as part of the rear housing, and only the cup portion of the cyclone assembly—that is, the portion formed by the sidewall and the bottom wall—is removable to empty it. In addition, while the foregoing embodiments describe the cup being removed from the lid to be emptied, the cyclone chamber may alternatively be emptied by opening or removing the lower wall, such as shown in U.S. Pat. No. 6,546,593, which is incorporated herein by reference. In still other embodiments, the cyclone assembly may deposit dirt and debris into a separate chamber by inertia, as in U.S. Pat. No. 6,168,641, or by the operation of a manual or automatic trapdoor, as in U.S. Pat. No. 6,344,064. These patents are incorporated herein by reference. The present invention may be used with any suitable configuration for attaching the cyclone assembly to the vacuum cleaner.
As noted before, the prior art contemplates forming the outlet 210 integrally with the bottom wall 204 and sidewall 202. The present inventors have found that using this one-piece construction can limit the manufacturer's ability to economically produce desirable inlet and outlet conduit configurations. The prior art also contemplates welding an outlet conduit to a dirt cup, such as shown in U.S. Pat. No. 2,684,125. However this prevents removal of the outlet conduit, and may also require expensive manufacturing equipment and increased manufacturing time. The prior art also contemplates forming these parts separately, and joining them, but does so using threads formed on the parts being joined. For example, U.S. Pat. No. 6,578,230, which is incorporated herein by reference, discloses a outlet and bottom wall that appear to be integrally formed with one another, and attached to the sidewall by threaded engagement. The threads are located at the outer perimeter of the bottom wall, where it meets the lower edge of the cylindrical sidewall. This construction is believed to suffer from various disadvantages, such as thread degradation caused by the intrusion of dirt particles into the threads, and assembly difficulties caused by dirt accumulation, friction, misalignment and thread stripping. This configuration also appears to require relatively high manufacturing tolerances to ensure that the parts are close enough in shape to properly thread together, and requires both parts to include threaded portions, which increases the thickness at those locations, thus also increasing the weight and cost of the materials and their manufacture. In view of these expected shortcomings, it is preferred, in at least some embodiments of the invention, to avoid the use of such threads formed on the parts that form the dustcup assembly itself.
The present invention provides alternative dustcup assemblies that provide various advantages over the prior art, and may ameliorate or lessen the known and expected shortcomings of the prior art. It will be understood that it is not required for each embodiment of the claimed invention to address all, or even any, of the listed shortcomings of the prior art.
A first exemplary embodiment of a dustcup assembly 300 of the present invention is shown in
The embodiment of
The recess 314 and flange 316 are preferably, but not necessarily, shaped so that the flange 316 can not rotate relative to the recess 314 when it is installed therein. While any non-circular shape will suffice, relative rotation is prevented in the embodiment of
Various modifications to this design are possible. For example, the screws could pass through the lower wall 304 and be installed into the flange 316. The screws may also be omitted, and the flange 316 and recess 314 may be adapted to have snap-fitting tabs and detents to allow the outlet tube 310 to simply be pressed into place. The flange 316 and recess 314 may also be slightly tapered or provided with interfering dimensions to allow them to be press-fit together. Furthermore, while releasable attachment is preferred, the outlet tube 310 may be permanently attached, such as by ultrasonic welding, spin welding, adhesives, and so on.
In addition, while the embodiment of
A second exemplary embodiment of the present invention is shown in
The bottom wall 404 is preferably attached by an arrangement including a latch 412 on one side of the sidewall 402, and a tab 414 on the opposite side of the sidewall 402. The tab 414 fits into a corresponding slot or opening 416 on a raised portion 418 of the bottom wall 404. This raised portion 418 preferably surrounds or abuts the lower edge of the sidewall 402 and includes a seal to form an airtight seal between the two parts when they are assembled. In the shown embodiment, the tab 414 is located in a recess 420 to help minimize the radial dimension of the assembly.
The latch 412 comprises a pivoting member including a hook 422 at its lower end, a button 424 at its upper end, and a pivot 426 or other fulcrum between the hook 422 and the button 424. The latch 412 is oriented on the sidewall 402 with the hook 422 located to engage a corresponding portion of the bottom wall 404. The combined engagement of the latch 412 on one side and the tab 414 and opening 416 on the other side of the bottom wall 404 prevent it (and the attached outlet tube 410) from being separated from the dustcup assembly 400. The pivot 426 is attached to the sidewall 402 so that the button 424 can be pressed radially inwardly, which moves the hook 422 radially outward, and out of engagement with the bottom wall 404, thereby allowing disassembly. A spring (not shown), is preferably captured between the button 424 and the sidewall 402 to resiliently bias the button 424 outward, and therefore the hook 422 inward, and in the locked position.
Like the tab 414, the latch 412 is preferably located in a recess 428 to help minimize the radial dimension of the dustcup assembly 400. Furthermore, the latch 412 preferably is positioned so that it is inaccessible when the dustcup assembly 400 is installed to the vacuum cleaner for use, such as by being located on the back side of the assembly along with the air inlet 408. As such, the latch is inaccessible in order to prevent accidental openings, and can only be activated when the dustcup assembly 400 is removed from the vacuum cleaner. In addition, while the latch 412 and tab 414 are illustrated as being on the sidewall 402, with the corresponding mating structures on the bottom wall 404, these positions can be reversed for the latch 412, tab 414, or both.
While it would be possible in the embodiment of
Referring now to
In use, it is likely that the operator will only have to operate a single one of the flexible latching tabs 512, and therefore the other flexible tab 512 may optionally be replaced by an inflexible tab, such as the one shown in the embodiment of
The upper end of the dustcup assembly 500 comprises an open end 503 that is covered with a removable lid (not shown). The dustcup assembly 500 is emptied by removing it from the vacuum cleaner, and inverting it to drop out the contents. This is done without disassembling the bottom wall 504 and outlet tube 510 from the sidewall 502. However, as with the embodiment of
In the embodiments described thus far herein, the outlet tube is attached to the dustcup assembly by inserting it from below the sidewalls. However, the opposite assembly is also possible with the present invention. An embodiment of such a construction is illustrated in
The embodiment of
While the structure with which the catches 614 engage may simply comprise the lower edge of the sidewall 602 or an inwardly-extending lip on the sidewall 602, it is preferred to provide the sidewall 602 with a radially inwardly-extending flange 616 with a downwardly-extending annular wall 618. The catches 614 engage the annular wall as shown in
The manufacture of the bottom wall 604, the flexible tabs 612 and the catches 614 may be facilitated by creating the bottom wall 604 with small openings 620 over each catch 614, which allows injection molding the part with only two mold portions. The bottom wall 604 may also include an annular wall that lies adjacent to annular wall 618, although this is not shown in the Figures. As with the embodiment of
A fifth embodiment of the invention is shown in
In this embodiment, one or both of the dustcup sidewall 702 and the bottom wall sidewall 714 must flex in a manner to allow the parts to be pushed together for assembly. To this end, one or both parts may be made of a somewhat flexible material, or may be provided with slots between the openings 712 and/or tabs 716 (not shown) that increase the local flexibility of the material in the region proximate to the openings 712 and/or tabs 716. The tabs 716 may also be beveled to ease their entry into the sidewall 702, and the sidewall 702 may be provided with a chamfered interior edge or ramps for the same purpose. A seal (not shown) may also be provided between the parts to assist with forming an air- and dirt-tight connection. As with the foregoing embodiment, it will be appreciated that the number and size of the tabs 716 and openings 712 can be varied according to the manufacturer's desires. Generally, the use of more tabs 716 and openings 712 provides a more positive lock between the parts, but may require greater manufacturing tolerances or steps to produce the parts. A greater number of tabs 716 and openings 712 also increases the difficulty of disassembling the parts, making it a one-shot snap-fit, which may be preferred if it not desired for the end-user to be able to perform such disassembly. For example, one instance in which disassembly may not be desired is when the parts are provided with an airtight seal by an adhesive tape or epoxy that could be damaged or destroyed by disassembly.
The bottom of the outlet tube 810 includes three cam followers 812 (two of which are visible in
As shown in
In a variation of this embodiment, shown in
Other variations of rotating cam locking devices may be used with the present invention. In addition, as with other embodiments described herein, the outlet tube may actually be formed integrally with the bottom wall, and these parts may be cam locked to the sidewall. The bottom wall may also be formed in two parts, one of which is attached to the sidewall, and the other of which is attached to the outlet tube, and which are attached together by cam locks to form the dustcup assembly. Other variations of the cam locking devices and their location and use to form a dustcup assembly will be appreciated by those of ordinary skill in the art in view of the present disclosure, and with routing experimentation with the present invention.
Referring now to
The dustcup assembly 1000 is assembled by positioning the bottom wall 1004 to abut the lower edge of the sidewall 1002, and installing the fastening ring 1012 over the bottom wall 1004. The catches 1022 pass through the notches 1020 in the upper radial wall 1016, and the fastening ring 1012 is rotated until he catches are located under the upper radial wall 1016. In this position, the bottom wall 1004 is captured in place between the fastening ring 1012 and the sidewall 1002, and secured by the catches 1022. One or both of the catches 1022 and the lower surface of the upper radial wall 1016 may include detents, cam surfaces, or other devices to provide a compression force or a locking engagement to hold the parts together, as described above with reference to
The foregoing embodiments and variations thereof provide several performance advantages in dustcup assemblies. For example, the use of such heterogeneous parts can provide weight savings, improved cleanability, additional options for emptying the dustcup assembly, improved aesthetics, and so on. This construction also allows the dustcup assembly to include specialty materials without unduly raising the cost of the device. For example the outlet conduit may be produced with an anti-microbial additive, such as MICROBAN (available from Microban International, Ltd. of New York, N.Y.), to assist with keeping the dustcup assembly microbe free, but the sidewall may not be treated to reduce expense.
In addition, the present invention can provide a number of manufacturing and engineering benefits. For example, in many instances, the parts can be manufactured as two simple assemblies using two-part injection molds. This two-part construction allows the parts to be made from different materials, with different thicknesses, or with different colors or graphics. Other manufacturing advantages may include quicker molding time, reduced tooling cost, reduced molding scrap, eliminating the need for providing a mold-griping surface on the parts, and so on. The two-part construction of the present invention also allows, if desired, the parts to be disassembled for more economical shipping, as removal of the outlet tube from the center of the dustcup assembly can allow additional parts of the device to be shipped within the dustcup assembly itself. Still another benefit of using a separate part for the outlet tube is that the outlet tube can be replaced with different shaped tubes (e.g., longer, shorter, wider, or narrower) to facilitate the use of different filter sizes and to make different end products, without requiring an entirely new dustcup assembly mold to be produced. This has one particular advantage of improving product development lead times.
In addition, while the embodiments described herein describe the outlet tube as being an air passage for air to exit the dustcup assembly, the present teachings are also applicable to air inlet passages that are attached to or pass through the dustcup assembly, and are also applicable to dustcup assembly inserts that do not actually carry an airflow therethrough.
Still other benefits of the two-piece construction of present invention are described below with respect of various additional embodiments, which may be used with any of the foregoing embodiments.
Referring now to
An alternative embodiment of an outlet tube that may be used with the present invention is shown in
Another embodiment of a dustcup assembly of the present invention that is facilitated by the use of a two-part assembly is shown in
A particular advantage of two-part construction of the present invention is that this embodiment may be manufactured from any of the foregoing embodiments by molding the sidewall 1302 with an opening to receive the outlet tube 1310, and covering the original opening through the bottom wall 1304 with an airtight cover (or vice versa for making any of the foregoing embodiments from the present embodiment). This facilitates the manufacture of a variety of products using a single sidewall as a platform.
The installation of the embodiment of
While the foregoing embodiments have depicted the sidewall being cylindrical, this shape is not required, and conical, frusto-conical, and other shapes may be used. In addition the outlet tube may have any number of non-circular profiles. The use of the two-part assembly of the present invention also facilitates the manufacture of outlet tubes having relatively complex shapes. Referring to
The embodiments of
The present invention also allows the use of multiple outlet tubes having relatively complex geometry. Referring now to
In one embodiment, the a filter 1512 is located at the top of the tubes 1510, but this is not required. If such a filter 1512 is provided, the outlet tubes 1510 may be attached to the bottom of the filter 1512 to draw air from the filter 1512 in a tangential manner, which may enhance the post-filter airflow through the device.
While the embodiments of the invention described above are preferred, it will be recognized and understood that these embodiments are not intended to limit the invention, which is limited only by the appended claims. Various modifications may be made to these embodiments without departing from the spirit of the invention and the scope of the claims.
Claims
1. An upright vacuum cleaner comprising:
- a housing having an upper housing end and a lower housing end;
- a handle associated with the upper housing end;
- a base pivotally attached to the lower housing end, the base comprising a floor inlet nozzle facing generally downwardly therefrom;
- a dustcup assembly associated with at least one of the housing and the base, the dustcup assembly comprising: a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit formed separately from the bottom wall and attached to the bottom wall at the dustcup outlet, the fluid conduit extending into the interior space defined by the sidewall; and
- a vacuum source associated with at least one of the housing and the base, the vacuum source being adapted to create a working air flow that enters the floor inlet nozzle, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
2. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by one or more screws.
3. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by a rotating cam lock arrangement.
4. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by one or more flexible latching tabs.
5. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by snap-fit engagement.
6. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by an interference fit.
7. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by bayonet fittings.
8. The vacuum cleaner of claim 1, wherein the fluid conduit is attached to the bottom wall by a fastening ring.
9. The vacuum cleaner of claim 1, further comprising a gasket interposed between the fluid conduit and the bottom wall.
10. The vacuum cleaner of claim 1, wherein the fluid conduit comprises an airfoil cross-section.
11. The vacuum cleaner of claim 1, wherein the fluid conduit comprises one or more integrally formed contours to assist with dust separation.
12. The vacuum cleaner of claim 1, wherein the fluid conduit comprises one or more integrally formed airflow deflectors.
13. The vacuum cleaner of claim 1, wherein the bottom wall comprises at least one additional dustcup outlet, and the dustcup assembly comprises at least one additional fluid conduit attached to the bottom wall at the at additional dustcup outlet and extending into the interior space defined by the sidewall.
14. The vacuum cleaner of claim 1, wherein the fluid conduit comprises a first section having a first geometric profile, and a second section having a second geometric profile, the second geometric profile being different from the first geometric profile.
15. The vacuum cleaner of claim 1, wherein the dustcup assembly is adapted to be releasably attached to the housing, and the dustcup lid is formed by the housing.
16. The vacuum cleaner of claim 1, wherein the dustcup assembly is adapted to be releasably attached to the housing, and the dustcup lid is a separate part that is removable with the dustcup assembly from the housing.
17. The vacuum cleaner of claim 1, wherein the dustcup inlet enters the interior space defined by the sidewall through the lid.
18. The vacuum cleaner of claim 1, wherein the dustcup inlet enters the interior space defined by the sidewall through the sidewall.
19. The vacuum cleaner of claim 1, wherein the fluid conduit is releasably attached to the bottom wall.
20. The vacuum cleaner of claim 1, wherein the fluid conduit is not releasably attached to the bottom wall.
21. A vacuum cleaner comprising:
- a housing;
- one or more air inlet nozzles associated with the housing;
- a dustcup assembly associated with the housing, the dustcup assembly comprising: a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit formed separately from the bottom wall and releasably attached to the bottom wall at the dustcup outlet, the fluid conduit extending into the interior space defined by the sidewall; and
- a vacuum source associated with the housing, the vacuum source being adapted to create a working air flow that enters the one or more inlet nozzles, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
22. The vacuum cleaner of claim 21, wherein the fluid conduit is attached to the bottom wall by one or more of the following devices: one or more screws, a rotating cam lock arrangement, one or more flexible latching tabs, snap-fitting members, interference fitting members, bayonet fittings, a fastening ring.
23. The vacuum cleaner of claim 21, further comprising a gasket interposed between the fluid conduit and the bottom wall.
24. The vacuum cleaner of claim 21, wherein the fluid conduit comprises an airfoil cross-section.
25. The vacuum cleaner of claim 21, wherein the fluid conduit comprises one or more integrally formed contours to assist with dust separation.
26. The vacuum cleaner of claim 21, wherein the fluid conduit comprises one or more integrally formed airflow deflectors.
27. The vacuum cleaner of claim 21, wherein the bottom wall comprises at least one additional dustcup outlet, and the dustcup assembly comprises at least one additional fluid conduit attached to the bottom wall at the at additional dustcup outlet and extending into the interior space defined by the sidewall.
28. The vacuum cleaner of claim 21, wherein the fluid conduit comprises a first section having a first geometric profile, and a second section having a second geometric profile, the second geometric profile being different from the first geometric profile.
29. The vacuum cleaner of claim 21, wherein the dustcup assembly is adapted to be releasably attached to the housing, and the dustcup lid is formed by the housing.
30. The vacuum cleaner of claim 21, wherein the dustcup assembly is adapted to be releasably attached to the housing, and the dustcup lid is a separate part that is removable with the dustcup assembly from the housing.
31. The vacuum cleaner of claim 21, wherein the dustcup inlet enters the interior space defined by the sidewall through the lid.
32. The vacuum cleaner of claim 21, wherein the dustcup inlet enters the interior space defined by the sidewall through the sidewall.
33. A vacuum cleaner comprising:
- a housing;
- one or more air inlet nozzles associated with the housing;
- a dustcup assembly associated with the housing, the dustcup assembly comprising: a sidewall defining an interior space having an open top end and a bottom end, a bottom wall extending across the bottom end and having a dustcup outlet therethrough, a dustcup inlet, a dustcup lid adapted to selectively cover the open top, and a fluid conduit attached to the bottom wall at the dustcup outlet, the fluid conduit extending into the interior space defined by the sidewall, wherein the fluid conduit and at least a portion of the bottom wall form a combined conduit/bottom wall part that is formed separately from the sidewall and attached thereto; and
- a vacuum source associated with the housing, the vacuum source being adapted to create a working air flow that enters the one or more inlet nozzles, passes into the dustcup assembly through the dustcup inlet, and exits the dustcup assembly through the dustcup outlet.
34. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is removably attached to the sidewall by a fastener that does not comprise threads formed on the combined conduit/bottom wall part itself.
35. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by one or more screws.
36. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by a rotating cam lock arrangement.
37. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by one or more flexible latching tabs.
38. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by snap-fit engagement.
39. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by an interference fit.
40. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by bayonet fittings.
41. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is attached to the sidewall by a fastening ring.
42. The vacuum cleaner of claim 33, further comprising a gasket interposed between the combined conduit/bottom wall part and the sidewall.
43. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is releasably attached to the sidewall.
44. The vacuum cleaner of claim 33, wherein the combined conduit/bottom wall part is not releasably attached to the sidewall.
Type: Application
Filed: Jan 19, 2006
Publication Date: Jul 19, 2007
Inventors: Arnold Sepke (Hudson, IL), William Reimer (Normal, IL)
Application Number: 11/334,467
International Classification: A47L 9/10 (20060101); A47L 9/16 (20060101);