US4704765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable vacuum cleaner
Assignee: Sharp Corp
•
Filing: 1987-02-24
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Granted: 1987-11-10
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Expires: 2007-02-24
Abstract
Abstract A portable vacuum cleaner contains within its housing a dust collecting part in front of a fan. A suction inlet is at the front end and the opening surface defined by it is nearly horizontal and either coplanar with or protruding below the bottom surface of the housing so that the accumulated dust will not fall out of the suction inlet when the fan is stopped.
Inventors
- 👤 Yasukazu Ataka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:08
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/24; A47L9/242; A47L9/244; A47L5/00; A47L5/12; A47L5/22; A47L5/24
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
101 words
A portable vacuum cleaner comprising a housing having a front end, a back end and a bottom surface, said front end being formed with a downward-facing suction inlet having an opening, the surface defining said opening being coplanar with said bottom surface, a dust collecting means inside said housing, a suction-generating means behind said dust collecting means inside said housing, and an accessory piece which is removably attachable to said suction inlet, said housing including a storage section near said back end, said storage section being adapted to contain said accessory piece and provided with a door on said back end.
Claim 2
Dependent Claim
101 words
A portable vacuum cleaner comprising a housing having a front end, a back end and a bottom surface, said front end being formed with a downward-facing suction inlet having an opening, the surface defining said opening being coplanar with said bottom surface, a dust collecting means inside said housing, a suction-generating means behind said dust collecting means inside said housing, and an accessory piece which is removably attachable to said suction inlet, said housing including a storage section near said back end, said storage section being adapted to contain said accessory piece and provided with a door on said back end.
Claim 3
Dependent Claim
18 words
The vacuum cleaner of claim 1 wherein said accessory piece is a means for vacuum-cleaning a narrow area.
Claim 4
Dependent Claim
44 words
The vacuum cleaner of claim 1 wherein said accessory piece is L-shaped as a whole and comprises a base part which is detachably engageable to said suction inlet and a flat suction pipe part which is disposed on one side of said base part.
Claim 5
Dependent Claim
25 words
The vacuum cleaner of claim 3 wherein said flat suction pipe part has a free end which is perpendicular to said flat suction pipe part.
Claim 6
Dependent Claim
26 words
The vacuum cleaner of claim 3 wherein said flat suction pipe part has a free end which makes an angle with said flat suction pipe part.
Claim 7
Dependent Claim
63 words
The vacuum cleaner of claim 1 further comprising an air passage which extends upward from said suction inlet to a point and opens into said dust collecting means at said point, said dust collecting means having an inner bottom surface and said point being at a higher position than said inner bottom surface, said air passage having a check valve at said point.
Claim 8
Dependent Claim
21 words
The vacuum cleaner of claim 6 wherein said check valve is adapted to swing upward to open and downward to close.
Claim 9
Dependent Claim
38 words
The vacuum cleaner of claim 1 further comprising a front cover which includes said suction inlet and is detachably attached to said front end of said housing, said dust collecting means being detachably attached to said front cover.
Claim 10
Dependent Claim
17 words
The vacuum cleaner of claim 1 wherein said surface defining said opening lies below said bottom surface.
Claim 11
Dependent Claim
116 words
A portable vacuum cleaner comprising a housing having a front end formed with a suction inlet, a back end, a bottom surface and a storage section near said back end, a dust collecting means inside said housing, a suction-generating means behind said dust collecting means inside said housing, and an accessory piece which is removably attachable to said suction inlet, said storage section being adapted to contain said accessory piece and provided with a door on said back end, said accessory piece being L-shaped as a whole and including a base part which is detachably engageable to said suction inlet and a flat suction pipe part which is disposed on one side of said base part.
Claim 12
Dependent Claim
116 words
A portable vacuum cleaner comprising a housing having a front end formed with a suction inlet, a back end, a bottom surface and a storage section near said back end, a dust collecting means inside said housing, a suction-generating means behind said dust collecting means inside said housing, and an accessory piece which is removably attachable to said suction inlet, said storage section being adapted to contain said accessory piece and provided with a door on said back end, said accessory piece being L-shaped as a whole and including a base part which is detachably engageable to said suction inlet and a flat suction pipe part which is disposed on one side of said base part.
Claim 13
Dependent Claim
25 words
The vacuum cleaner of claim 10 wherein said flat suction pipe part has a free end which is perpendicular to said flat suction pipe part.
Claim 14
Dependent Claim
26 words
The vacuum cleaner of claim 10 wherein said flat suction pipe part has a free end which makes an angle with said flat suction pipe part.
Claim 15
Dependent Claim
38 words
The vacuum cleaner of claim 10 further comprising a front cover which includes said suction inlet and is detachably attached to said front end of said housing, said dust collecting means being detachably attached to said front cover.
Claim 16
Dependent Claim
134 words
A portable vacuum cleaner comprising a housing having a front end formed with a suction inlet, a back end, a bottom surface and a storage section near said back end, a dust collecting means inside said housing, a suction-generating means behind said dust collecting means inside said housing, an accessory piece which is removably attachable to said suction inlet, said storage section being adapted to contain said accessory piece and provided with a door on said back end, and an air passage which extends upward from said suction inlet to a point and opens into said dust collecting means at said point, said dust collecting means having an inner bottom surface and said point being at a higher position than said inner bottom surface, said air passage having a check valve at said point.
Claim 17
Dependent Claim
134 words
A portable vacuum cleaner comprising a housing having a front end formed with a suction inlet, a back end, a bottom surface and a storage section near said back end, a dust collecting means inside said housing, a suction-generating means behind said dust collecting means inside said housing, an accessory piece which is removably attachable to said suction inlet, said storage section being adapted to contain said accessory piece and provided with a door on said back end, and an air passage which extends upward from said suction inlet to a point and opens into said dust collecting means at said point, said dust collecting means having an inner bottom surface and said point being at a higher position than said inner bottom surface, said air passage having a check valve at said point.
Claim 18
Dependent Claim
21 words
The vacuum cleaner of claim 14 wherein said check valve is adapted to swing upward to open and downward to close.
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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) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |