US4592764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Sharp Corp
•
Filing: 1984-04-10
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Granted: 1986-06-03
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Expires: 2004-04-10
Abstract
Abstract A body of a vacuum cleaner comprising three subassemblies, i.e., a front subassembly, a central subassembly, and a rear subassembly. The front subassembly stores the matter drawn through a suction port formed in a suitable position. The central subassembly can be connected and disconnected with the front subassembly and has an evacuating device therein. The rear subassembly is connected to the central subassembly by coupling members and acts to cover the back side of the evacuating device incorporated in the central subassembly.
Inventors
- 👤 Katuzi Ikezaki
- 👤 Kiyoshi Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:25
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/122; A47L9/0009; A47L9/0018; A47L9/0027; A47L9/0036; A47L9/0081; A47L9/22; A47L9/26; B; B65; B65H; B65H75/00; B65H75/02; B65H75/34; B65H75/38; B65H75/44; B65H75/4418; B65H75/4428; B65H75/4431; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
A vacuum cleaner comprising: a body member divided into a front subassembly having an exhaust side and containing a suction port, said front subassembly defining a case for collecting dust, a central subassembly removably connected to the exhaust side of the front subassembly, said central subassembly containing a fan means acting as an evacuating device, a cord reel unit connected to the fan means, said cord reel unit being provided with a cord reel cover and vertically positioned adjacent to the fan means, whereby the cord reel unit is fixed to said fan means via the cord reel cover, said cord reel cover screening the exhaust gas from said cord reel unit, and a rear subassembly removably connected to the central subassembly and functioning to cover the rear side of the fan means disposed in the central subassembly, said rear subassembly containing an exhaust port for removing exhaust gas therefrom.
Claim 2
Dependent Claim
150 words
A vacuum cleaner comprising: a body member divided into a front subassembly having an exhaust side and containing a suction port, said front subassembly defining a case for collecting dust, a central subassembly removably connected to the exhaust side of the front subassembly, said central subassembly containing a fan means acting as an evacuating device, a cord reel unit connected to the fan means, said cord reel unit being provided with a cord reel cover and vertically positioned adjacent to the fan means, whereby the cord reel unit is fixed to said fan means via the cord reel cover, said cord reel cover screening the exhaust gas from said cord reel unit, and a rear subassembly removably connected to the central subassembly and functioning to cover the rear side of the fan means disposed in the central subassembly, said rear subassembly containing an exhaust port for removing exhaust gas therefrom.
Claim 3
Dependent Claim
128 words
The vacuum cleaner of claim 1, further comprising: a clamp disposed on the outer surface of the front end of the central subassembly and pivotally mounted to the central subassembly, the clamp having a hook portion at its front end for engaging purposes; a spring mounted to the central subassembly, said spring being arranged and positioned to bias the hook portion of the clamp inwardly of the central subassembly; and a protrusion formed opposite to the clamp and on the outer surface of the rear end of the front subassembly; wherein the hook portion is in engagement with the protrusion while the rear end of the front subassembly is in contact with the front end of the central subassembly to connect the front subassembly to the central subassembly.
Claim 4
Dependent Claim
30 words
The vacuum cleaner of claim 1, wherein the fan means includes a fan motor and a fan cover coupled thereto, said fan cover positioned to directly cover the fan motor.
Claim 5
Dependent Claim
83 words
The vacuum cleaner of claim 3, further comprising: a support rib formed within the central subassembly and opposed to the outer periphery of the fan cover; a shock-absorbing member covering the outer periphery of the fan cover and interposed between the outer periphery of the cover and the support rib; and a holding member disposed on the outer periphery of the fan cover and cooperating with the shock-absorbing member to press the fan cover against the support rib, thereby holding the fan means.
Claim 6
Dependent Claim
62 words
The vacuum cleaner of claim 1, wherein the cord reel cover has a cover surface that covers the surface of the cord reel, said cover surface being provided with a protrusion which is formed on the cover surface and closes a part of an opening formed in the central subassembly, said opening and protrusion being arranged to define a cord takeout port.
Claim 7
Dependent Claim
38 words
The vacuum cleaner of claim 5, wherein a fan motor-retaining portion is formed integrally with the cord reel cover and fixedly holds the fan means in the central subassembly by attachment of the cover to the central subassembly.
Claim 8
Dependent Claim
49 words
The vacuum cleaner of claim 1, wherein the cord reel unit includes a locking device that acts to brake the cord reel when the cord is being wound up on the reel, the locking device being caused to unlock the cord reel by the rotation of an unlocking lever.
Claim 9
Dependent Claim
63 words
The vacuum cleaner of claim 7, wherein said locking device has an unlocking button molded out of a synthetic resin and integral with said unlocking lever via a thin-walled hinge, the button extending outwardly from one end of the locking lever through a hole formed in the cord reel unit, the unlocking button acting to rotate the unlocking lever when it is depressed.
Claim 10
Dependent Claim
148 words
The vacuum cleaner of claim 1, further comprising; a main filter detachably fitted via an O ring into an opening formed at the rear end of the front subassembly; a dust shaker disposed on the back side of the main filter so as to cause dust to fall from the main filter; a prefilter having a filter surface at least on its front side and a partition wall that covers the back side of the filter suface from the top to both sides thereof, said prefilter being disposed on the front side of the main filter; and a fine dust-collecting chamber formed between the filters and being open at its lower end, the lower fringe of the prefilter contacting the bottom of a dust case to close the lower opening of the fine dust-collecting chamber while both filters are received in the front subassembly of the body member.
Claim 11
Dependent Claim
27 words
The vacuum cleaner of claim 9, wherein the front surface of the prefilter is tilted such that the fine dust-collecting chamber is gradually enlarged toward its bottom.
Claim 12
Dependent Claim
74 words
The vacuum cleaner of claim 1, wherein the body member of the cleaner further contains: a recess extending from the top of the body member to the peripheral side surface, said recess being formed by an upwardly extending wall, a cord takeout port formed in the upwardly extending wall that forms the recess, and a wall extending above the cord takeout port and in the same direction that a power cord is pulled out.
Claim 13
Dependent Claim
18 words
The vacuum cleaner of claim 1, further comprising front wheels and rear wheels attached to the body member.
Claim 14
Dependent Claim
24 words
The vacuum cleaner of claim 12, wherein a hollow case is removably attached to the bottom of the body member for housing vacuum attachments.
Claim 15
Dependent Claim
54 words
The vacuum cleaner of claim 13, wherein bosses through which the axles of the rear wheels pass are formed on both sides of the body member of the cleaner, and wherein the upper ends, on opposite sides of the case that receives the body member are provided with notches in which the bosses fit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |