US20100263162A1 - Vacuum cleaning system - Google Patents
Vacuum cleaning system Download PDFInfo
- Publication number
- US20100263162A1 US20100263162A1 US12/423,805 US42380509A US2010263162A1 US 20100263162 A1 US20100263162 A1 US 20100263162A1 US 42380509 A US42380509 A US 42380509A US 2010263162 A1 US2010263162 A1 US 2010263162A1
- Authority
- US
- United States
- Prior art keywords
- nozzle
- exhaust
- cleaning system
- air stream
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000010407 vacuum cleaning Methods 0.000 title claims abstract description 55
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 238000007664 blowing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/0072—Mechanical means for controlling the suction or for effecting pulsating action
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/14—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum cleaning by blowing-off, also combined with suction cleaning
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
- A47L9/08—Nozzles with means adapted for blowing
Definitions
- a drawback for the above described conventional vacuum cleaner is that it is often ineffective in removing dirt hidden behind objects, in narrow spaces, or non-flat surfaces such as computer keyboard, computer vent, car dashboard, or non-flat filters. In these situations, the air current drawn into the suction nozzle often cannot reach some areas where the dirt is located. A narrow suction nozzle tip is usually not small enough for it to reach some of these narrow spaces (e.g. in the case of a computer key board) and cannot cover enough area (e.g. in the case of a car dashboard).
- Another advantage of the disclosed vacuum cleaning system is that it provides additional air blowing function in additional to the vacuum cleaning function, which makes it effective for removing dirt as well as collecting dirt.
- An electric blower 260 is coupled to the exhaust pipe 270 at the downstream side of the dirt collection chamber 240 .
- the electric blower 260 is configured to create exhaust vacuum behind the dirt collection chamber 240 to create a suction air stream 235 along the suction pipe 230 and an exhaust air stream 275 along the exhaust pipe 270 .
- Air carrying dirt is suctioned into the suction nozzle 210 , flowing through the air conduit 221 and the suction pipe 230 , into the dirt collection chamber 240 .
- Majority of the dirt 245 in the suction air is stopped by the dirt separation member 250 and collected in the dirt collection chamber 240 .
- the exhaust air stream 275 is guided by the turn-around path 278 to the air conduit 222 , and blown out of the exhaust nozzle 290 .
- the suction pipe 230 , the exhaust pipe 270 , and the dirt collection chamber 240 in part form a close loop. In one implementation, the close loop forms a circular path.
- the air blowing function is effective for cleaning objects such as computer keyboard, car dash board, car seat, and carpets, etc.
- the vacuum cleaning system 200 can also be used to assist removing dirt adhered to a surface. Some dirt is stuck to a surface too strongly to be detached by vacuum suction alone. The blown air out of exhaust nozzle 290 can help detach the dirt from the underlying surface, and then removed by suction by the suction nozzle 210 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
A vacuum cleaning system includes a nozzle assembly comprising a first nozzle and a second nozzle, a first air conduit in communication with the first nozzle, an air blower that can produce a suction air stream into the first nozzle and through the first air conduit and produce an exhaust air stream out of the second nozzle, a dirt separation member that can stop dirt in the suction air stream and to allow the exhaust air stream to pass through the dirt separation member, a dirt collection chamber that can collect the dirt in the suction air stream, and a second air conduit that can guide the exhaust air stream to the second nozzle.
Description
- This application relates to a vacuum cleaning system.
- A
conventional vacuum cleaner 100, referring toFIG. 1 , includes asuction nozzle 110, aflexible hose 120 connected to thesuction nozzle 110, apipe 130 connected to theflexible hose 120, adirt collection chamber 140 connected to thepipe 130, and anexhaust pipe 170 connected to thedirt collection chamber 140. Afilter 150 is mounted on a wall on the down stream side of thedirect collection chamber 140. Anelectric blower 160 coupled to theexhaust pipe 170 is configured to create exhaust vacuum behind thedirt collection chamber 140 and to produce a suction air stream. Air carrying dirt can be suctioned into thesuction nozzle 110, flowing through thehose 120 and thepipe 130, into thedirt collection chamber 140. A majority of thedirt 145 is filtered by thefilter 150 and collected in thedirt collection chamber 140. Air is exhausted through theexhaust pipe 170 and out of thevacuum cleaner 100. - A drawback for the above described conventional vacuum cleaner is that it is often ineffective in removing dirt hidden behind objects, in narrow spaces, or non-flat surfaces such as computer keyboard, computer vent, car dashboard, or non-flat filters. In these situations, the air current drawn into the suction nozzle often cannot reach some areas where the dirt is located. A narrow suction nozzle tip is usually not small enough for it to reach some of these narrow spaces (e.g. in the case of a computer key board) and cannot cover enough area (e.g. in the case of a car dashboard).
- Another drawback for the above described conventional vacuum cleaner is that it is often ineffective in removing dirt adhered to a surface. The suction force at the suction nozzle is often not strong enough to detach the dirt from the underlying surface in these situations.
- Another drawback for the above described conventional vacuum cleaner is that any residual dirt that is not stopped by the filter is blown right back into the air, which not only results in incomplete cleaning, but can also cause allergy problems to people residing in the ambient environment.
- There is therefore a need to provide a more effective vacuum cleaning system to overcome the above described drawbacks.
- In a general aspect, the present invention relates to a vacuum cleaning system that includes a nozzle assembly comprising a first nozzle and a second nozzle, a first air conduit in communication with the first nozzle, an air blower that can produce a suction air stream into the first nozzle and through the first air conduit and produce an exhaust air stream out of the second nozzle, a dirt separation member that can stop dirt in the suction air stream and to allow the exhaust air stream to pass through the dirt separation member, a dirt collection chamber that can collect the dirt in the suction air stream, and a second air conduit that can guide the exhaust air stream to the second nozzle.
- In another general aspect, the present invention relates to a vacuum cleaning system that includes a first nozzle that can receive a suction air stream, a first air conduit in communication with the first nozzle, a second nozzle that can output an exhaust air stream, a second air conduit that can guide the exhaust air stream to the second nozzle, an air blower that can produce the suction air stream in the first air conduit and to produce the exhaust air stream in the second air conduit, an exhaust air regulator that can exhaust at least a portion of the exhaust air stream and to vary the amount of the exhaust air stream exiting the second nozzle, a dirt separation member that can stop dirt in the suction air stream and to allow the exhaust air stream to pass through the dirt separation member, and a dirt collection chamber that can collect the dirt in the suction air stream.
- Implementations of the system may include one or more of the following. At least one of the first nozzle or the second nozzle is moveable to allow the distance between the first nozzle and the second nozzle to be adjusted. The vacuum cleaning system can further include an exhaust air regulator that can exhaust at least a portion of the exhaust air stream, wherein the exhaust air regulator can vary the amount of the exhaust air stream exiting the second nozzle. The vacuum cleaning system can further include a hose through which the first air conduit and the second conduit are disposed. The first air conduit and the second conduit are separable. At least one of the first air conduit and the second conduit comprises a flexible hose. The vacuum cleaning system can further include a first pipe in connection with the first air conduit in the hose and the dirt collection chamber; and a second pipe in connection with the second air conduit in the hose and the dirt collection chamber, wherein the air blower is coupled to the second pipe. The first pipe, the second pipe, and the dirt collection chamber in part form a close loop. The vacuum cleaning system can further include an exhaust air regulator coupled to the second pipe and that can exhaust at least a portion of the exhaust air stream, wherein the exhaust air regulator can vary the amount exhaust air stream exiting the second nozzle. The exhaust air regulator can include one or more openings along the second pipe, wherein the one or more opening can exhaust at least a portion of the exhaust air stream and a cover can cover the one or more openings to regulate the amount of the exhaust air stream exhausted through the one or more openings.
- Embodiments may include one or more of the following advantages. The disclosed vacuum cleaning system can overcome some drawbacks in conventional vacuum cleaners. An advantage of the disclosed vacuum cleaning system is that it is effective in removing dirt hidden behind objects, in narrow spaces, and non-flat surfaces. The disclosed vacuum cleaning system is also more effective in removing dirt adhered to a surface.
- Another advantage of the disclosed vacuum cleaning system is that it provides additional air blowing function in additional to the vacuum cleaning function, which makes it effective for removing dirt as well as collecting dirt.
- Yet another advantage of the disclosed vacuum cleaning system is that it is energy efficient. Part of the energy in the exhaust air stream can be recycled to assist the movement of the suction air current. The improved energy efficiency may lead to smaller motor size for the air blower and weight reduction for the vacuum system.
- Still another advantage of the disclosed vacuum cleaning system is that it can re-collect the residual dirt that passes through the filter and thus is more effective in dirt collection. The exhaust air can thus be cleaner and the dirt removal more comprehensive than some conventional vacuum cleaners.
- Although the invention has been particularly shown and described with reference to multiple embodiments, it will be understood by persons skilled in the relevant art that various changes in form and details can be made therein without departing from the spirit and scope of the invention.
- The following drawings, which are incorporated in and form a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the invention.
-
FIG. 1 is a schematic diagram of a conventional vacuum cleaner. -
FIG. 2A is a schematic diagram of an implementation of a vacuum cleaning system in accordance with the present invention. -
FIG. 2B is a schematic diagram of the vacuum cleaning system ofFIG. 2A wherein the exhaust air regulator is in a different position. -
FIG. 2C is a schematic diagram of the vacuum cleaning system ofFIG. 2A wherein the exhaust air regulator is in yet another different position. -
FIG. 3 is a schematic side view of the vacuum cleaning system ofFIG. 2A in a vacuum cleaning operation. -
FIG. 4 is a schematic top view of the vacuum cleaning system ofFIG. 2A showing the flow directions of the suction air and the blown air. -
FIG. 5 is a schematic diagram of the vacuum cleaning system ofFIG. 2A wherein the air suction nozzle and the air blowing nozzles are positioned apart. -
FIG. 6 is a schematic diagram of another implementation of a vacuum cleaning system in accordance with the present invention. - Referring to
FIG. 2A , avacuum cleaning system 200 includes asuction nozzle 210, aflexible hose 220, asuction pipe 230, adirt collection chamber 240 connected to thesuction pipe 230, and anexhaust pipe 270 connected to thedirt collection chamber 240. Adirt separation member 250 such as a filter is mounted on the down stream side of thedirect collection chamber 240. Theflexible hose 220 includes twoair conduits air conduit 221 connects thesuction nozzle 210 and thesuction pipe 230. Theexhaust pipe 270 connects to theair conduit 222 via a turn-aroundpath 278. Theair conduit 222 is connected to anexhaust nozzle 290. Thesuction nozzle 210 is connected to theair conduit 221 via aconnection member 211 while theexhaust nozzle 290 is connected to theair conduit 222 viaconnection member 291. The ends of theair conduits suction nozzle 210, theexhaust nozzle 290, and their connections to thehose 220 form anozzle assembly 215. - An
electric blower 260 is coupled to theexhaust pipe 270 at the downstream side of thedirt collection chamber 240. Theelectric blower 260 is configured to create exhaust vacuum behind thedirt collection chamber 240 to create asuction air stream 235 along thesuction pipe 230 and anexhaust air stream 275 along theexhaust pipe 270. Air carrying dirt is suctioned into thesuction nozzle 210, flowing through theair conduit 221 and thesuction pipe 230, into thedirt collection chamber 240. Majority of thedirt 245 in the suction air is stopped by thedirt separation member 250 and collected in thedirt collection chamber 240. Theexhaust air stream 275 is guided by the turn-aroundpath 278 to theair conduit 222, and blown out of theexhaust nozzle 290. Thesuction pipe 230, theexhaust pipe 270, and thedirt collection chamber 240 in part form a close loop. In one implementation, the close loop forms a circular path. - The
vacuum cleaning system 200 is capable of suctioning air into thesuction nozzle 210 and collecting the dirt carried by the suction air stream in thedirt collection chamber 240. Thevacuum cleaning system 200 can also blow exhaust air using theexhaust nozzle 290. The air blowing function can help blow out dirt hidden behind objects, in narrow spaces, and non-flat surfaces, which can be subsequently suctioned into thesuction nozzle 210. - Referring to
FIGS. 3 and 4 , air blown out of theexhaust nozzle 290 can be directed to push thedirt 245 in acleaning area 310 on asurface 300. The direct 245 is moved toward thesuction nozzle 210. Thesuction nozzle 210 suctions air to draw thedirt 245 into thesuction nozzle 210. The combination “pushing and moving” force and the “suction” force make the disclosed vacuum cleaning system more effective than some conventional vacuum cleaner systems. - The air blowing function is effective for cleaning objects such as computer keyboard, car dash board, car seat, and carpets, etc. The
vacuum cleaning system 200 can also be used to assist removing dirt adhered to a surface. Some dirt is stuck to a surface too strongly to be detached by vacuum suction alone. The blown air out ofexhaust nozzle 290 can help detach the dirt from the underlying surface, and then removed by suction by thesuction nozzle 210. - Another advantageous feature of the
vacuum cleaning system 200 is that the exhaust air is recycled to the vicinity of thesuction nozzle 210. At least a portion of the residual dirt that passed through thedirt separation member 250 can be re-collected to go through a second and a third filtering event. The exhaust air is thus cleaner and dirt removal more exhaustive than some conventional vacuum cleaners. - The
vacuum cleaning system 200 can be more energy efficient. As shown inFIGS. 3 and 4 , part of the momentum of the blown air (i.e. the exhaust air) can be recycled to accelerate the suction air into thesuction nozzle 210. The improved energy efficiency can also lead to smaller motor size in theblower 260 and potentially reduce weight for the vacuum cleaning system. - In some embodiments, referring to
FIGS. 2A-2C , thevacuum cleaning system 200 can further include anair regulation system 280 that is configured to regulate the exhaust of theexhaust air stream 275 along theexhaust pipe 270. Theair regulation system 280 can be implemented in many forms, and can be operated manually or with electric power. For example, the air regulator can includeholes 285 that allow air to be exhausted out of theexhaust pipe 270. Theholes 285 can be clear or installed with secondary air filters. A slidingcover 282 can be manually moved along adirection 288 to different positions along thepipe 270 to expose theholes 285, or cover some or all theholes 285. The air blowing strength is at maximum when all theholes 285 are blocked (FIG. 2C ), and is the least strong when all holes are exposed to let some exhaust air out. The amount and the strength of the exhausted air out of theexhaust nozzle 290 can thus be adjusted by allowing different amount of the air to be exhausted through theholes 285. - In some embodiments, referring to
FIG. 3 , theexhaust nozzle 290 can be mounted to theconnection member 291 in rotatable joint. Thesuction nozzle 210 can also be mounted to theconnection member 211 in rotatable joint. Theexhaust nozzle 290 can thus be positioned apart from thesuction nozzle 210 so that air blowing can be performed at a distance away the air suction. - Referring to
FIGS. 2A-3 , theexhaust nozzle 290 can exist in different shapes to maximize blowing intensity. For example, theexhaust nozzle 290 can have a narrower opening than that of thesuction nozzle 210 to produce strong air blowing power. Thesuction nozzle 210 and theexhaust nozzle 290 can be replaceable to allow different nozzles to be mounted for different cleaning situations. - In some embodiments, referring to
FIG. 3 , avacuum cleaning system 300 includes twoseparate air conduits suction nozzle 210 and theexhaust nozzle 290. Theair conduits exhaust nozzle 290 for blow exhaust air and to position thesuction nozzle 210 to remove dust without being constrained by the position of theexhaust nozzle 290. - It is understood that the present invention is described above with reference to exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made and other embodiments can be used without departing from the broader scope of the present invention. Therefore, these and other variations upon the exemplary embodiments are intended to be covered by the present invention. For example, the exhaust air regulator can be implemented in forms different from the example illustrated above. Moreover, the disclosed vacuum cleaning system is compatible with different configurations of the air conduits for the suction air and the exhaust air. For example, the exhaust air can be guided to the exhaust nozzle by a separate hose or pipe instead of sharing the same hose with the suction air as illustrated in the drawings of the present application.
Claims (19)
1. A vacuum cleaning system, comprising:
a nozzle assembly comprising a first nozzle and a second nozzle;
a first air conduit in communication with the first nozzle;
an air blower configured to produce a suction air stream into the first nozzle and through the first air conduit, and to produce an exhaust air stream out of the second nozzle;
a dirt separation member configured to stop dirt in the suction air stream and to allow the exhaust air stream to pass through the dirt separation member;
a dirt collection chamber configured to collect the dirt in the suction air stream; and
a second air conduit configured to guide the exhaust air stream to the second nozzle.
2. The vacuum cleaning system of claim 1 , wherein at least one of the first nozzle or the second nozzle is moveable to allow the distance between the first nozzle and the second nozzle to be adjusted.
3. The vacuum cleaning system of claim 1 , further comprising an exhaust air regulator configured to exhaust at least a portion of the exhaust air stream, wherein the exhaust air regulator is configured to vary the amount of the exhaust air stream exiting the second nozzle.
4. The vacuum cleaning system of claim 1 , further comprising a hose through which the first air conduit and the second conduit are disposed.
5. The vacuum cleaning system of claim 1 , wherein the first air conduit and the second conduit are separable.
6. The vacuum cleaning system of claim 1 , wherein at least one of the first air conduit and the second conduit comprises a flexible hose.
7. The vacuum cleaning system of claim 1 , further comprising:
a first pipe in connection with the first air conduit in the hose and the dirt collection chamber; and
a second pipe in connection with the second air conduit in the hose and the dirt collection chamber, wherein the air blower is coupled to the second pipe.
8. The vacuum cleaning system of claim 7 , wherein the first pipe, the second pipe, and the dirt collection chamber in part form a close loop.
9. The vacuum cleaning system of claim 1 , further comprising an exhaust air regulator coupled to the second pipe and configured to exhaust at least a portion of the exhaust air stream, wherein the exhaust air regulator is configured to vary the amount exhaust air stream exiting the second nozzle.
10. The vacuum cleaning system of claim 9 , wherein the exhaust air regulator comprises:
one or more openings along the second pipe, wherein the one or more opening are configured to exhaust at least a portion of the exhaust air stream; and
a cover configured to cover the one or more openings to regulate the amount of the exhaust air stream exhausted through the one or more openings.
11. A vacuum cleaning system, comprising:
a first nozzle configured to receive a suction air stream;
a first air conduit in communication with the first nozzle;
a second nozzle configured to output an exhaust air stream;
a second air conduit configured to guide the exhaust air stream to the second nozzle;
an air blower configured to produce the suction air stream in the first air conduit and to produce the exhaust air stream in the second air conduit;
an exhaust air regulator configured to exhaust at least a portion of the exhaust air stream and to vary the amount of the exhaust air stream exiting the second nozzle;
a dirt separation member configured to stop dirt in the suction air stream and to allow the exhaust air stream to pass through the dirt separation member; and
a dirt collection chamber configured to collect the dirt in the suction air stream.
12. The vacuum cleaning system of claim 11 , wherein at least one of the first nozzle or the second nozzle is moveable to allow the distance between the first nozzle and the second nozzle to be adjusted.
13. The vacuum cleaning system of claim 11 , further comprising a flexible hose through which the first air conduit and the second conduit are disposed.
14. The vacuum cleaning system of claim 11 , wherein the first air conduit and the second conduit are separable.
15. The vacuum cleaning system of claim 11 , further comprising:
a first pipe in connection with the first air conduit in the hose and the dirt collection chamber; and
a second pipe in connection with the second air conduit in the hose and the dirt collection chamber, wherein the air blower is coupled to the second pipe.
16. The vacuum cleaning system of claim 15 , wherein the first pipe, the second pipe, and the dirt collection chamber in part form a close loop.
17. The vacuum cleaning system of claim 11 , further comprising an exhaust air regulator coupled to the second pipe and configured to exhaust at least a portion of the exhaust air stream, wherein the exhaust air regulator is configured to vary the amount exhaust air stream exiting the second nozzle.
18. The vacuum cleaning system of claim 17 , wherein the exhaust air regulator comprises:
one or more openings along the second pipe, wherein the one or more opening are configured to exhaust at least a portion of the exhaust air stream; and
a cover configured to cover the one or more openings to regulate the amount of the exhaust air stream exhausted through the one or more openings.
19. The vacuum cleaning system of claim 11 , wherein at least a portion of the first air conduit and the second conduit is flexible
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/423,805 US20100263162A1 (en) | 2009-04-15 | 2009-04-15 | Vacuum cleaning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/423,805 US20100263162A1 (en) | 2009-04-15 | 2009-04-15 | Vacuum cleaning system |
Publications (1)
Publication Number | Publication Date |
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US20100263162A1 true US20100263162A1 (en) | 2010-10-21 |
Family
ID=42979854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/423,805 Abandoned US20100263162A1 (en) | 2009-04-15 | 2009-04-15 | Vacuum cleaning system |
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US (1) | US20100263162A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4457043A (en) * | 1979-11-16 | 1984-07-03 | Aktiengesellschaft Rolba | Sweeper particularly for collecting dust-like material, and the utilization thereof |
US6243915B1 (en) * | 1999-03-15 | 2001-06-12 | Sanyo Electric Co., Ltd. | Vacuum cleaner |
US20070256271A1 (en) * | 2006-05-04 | 2007-11-08 | Emerson Electric Co. | Locking blower nozzle with air bleed |
US7311742B2 (en) * | 2003-01-10 | 2007-12-25 | Matsushita Electric Industrial Co., Ltd. | Vacuum cleaner |
-
2009
- 2009-04-15 US US12/423,805 patent/US20100263162A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4457043A (en) * | 1979-11-16 | 1984-07-03 | Aktiengesellschaft Rolba | Sweeper particularly for collecting dust-like material, and the utilization thereof |
US6243915B1 (en) * | 1999-03-15 | 2001-06-12 | Sanyo Electric Co., Ltd. | Vacuum cleaner |
US7311742B2 (en) * | 2003-01-10 | 2007-12-25 | Matsushita Electric Industrial Co., Ltd. | Vacuum cleaner |
US20070256271A1 (en) * | 2006-05-04 | 2007-11-08 | Emerson Electric Co. | Locking blower nozzle with air bleed |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |