Patent US5297311A successfully refreshed from Google Patents.
US5297311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner
Assignee: Citywide Machine Wholesale Inc
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Filing: 1992-05-04
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Granted: 1994-03-29
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Expires: 2012-05-04
Abstract
Abstract A vacuum cleaner having a body with an inlet opening for dust laden air and an outlet. An impeller is located between the inlet and the outlet. A chamber within the body having at least one wall receives a perforate dust receptacle. The chamber is located up-stream of the impeller. An inlet passageway extends from the inlet opening into the chamber. This passageway is directed so that when a perforate dust receptacle is in position in the chamber, the inlet passage has an outlet directed at a wall of the dust receptacle. Dust laden air entering the receptacle is filtered to remove dust. The dust laden air, forced against the wall by the impeller, acts to keep the wall free of dust accumulation.
Inventors
- 👤 Krishan K. Puri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:20
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1427; A47L9/1436; A47L9/1445
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
238 words
A vacuum cleaner comprising: a body having an inlet for dust laden air and an outlet; a first door pivotally mounted to the body and containing the inlet for dust laden air; an impeller between the inlet and the outlet; a perforate dust receptacle able to filter dust from the dust laden air; an inlet pipe extending from the inlet for dust laden air into the perforate dust receptacle when the first door is closed; said perforate dust receptacle including a relatively rigid top having an opening to receive the pipe, the remainder of the dust receptacle being a perforate cylinder attached to the top and having at least one wall; a flexible gasket positioned in said opening of the perforate dust receptacle, said flexible gasket receiving said pipe to provide a close fit around the pipe; a flap formed flush with the top of the perforate dust receptacle, the flap including means for raising and folding the flap over the opening to seal the opening for disposal of the perforate dust receptacle without loss of the dust; said inlet pipe having an outlet remote from the lid, said inlet pipe being directed at said at least one wall whereby dust laden air entering the receptacle is filtered to remove dust and the dust laden air, forced against said at least one wall by the impeller, acts to keep said at least one wall free of dust accumulation.
Claim 2
Dependent Claim
238 words
A vacuum cleaner comprising: a body having an inlet for dust laden air and an outlet; a first door pivotally mounted to the body and containing the inlet for dust laden air; an impeller between the inlet and the outlet; a perforate dust receptacle able to filter dust from the dust laden air; an inlet pipe extending from the inlet for dust laden air into the perforate dust receptacle when the first door is closed; said perforate dust receptacle including a relatively rigid top having an opening to receive the pipe, the remainder of the dust receptacle being a perforate cylinder attached to the top and having at least one wall; a flexible gasket positioned in said opening of the perforate dust receptacle, said flexible gasket receiving said pipe to provide a close fit around the pipe; a flap formed flush with the top of the perforate dust receptacle, the flap including means for raising and folding the flap over the opening to seal the opening for disposal of the perforate dust receptacle without loss of the dust; said inlet pipe having an outlet remote from the lid, said inlet pipe being directed at said at least one wall whereby dust laden air entering the receptacle is filtered to remove dust and the dust laden air, forced against said at least one wall by the impeller, acts to keep said at least one wall free of dust accumulation.
Claim 3
Dependent Claim
19 words
A vacuum cleaner as claimed in claim 1 in which the body includes a wall to mount the impeller.
Claim 4
Dependent Claim
26 words
A vacuum cleaner as claimed in claim 1 in which the outlet has a filter to remove any dust that passes through the perforate dust receptacle.
Claim 5
Dependent Claim
24 words
A vacuum cleaner as claimed in claim 1 in which the outlet is closed by a perforate second door, pivotally attached to the body.
Claim 6
Dependent Claim
27 words
A vacuum cleaner as claimed in claim 1 in which the top, and thus the perforate dust receptacle, is clamped in place by the closed first door.
Claim 7
Dependent Claim
28 words
A vacuum cleaner as claimed in claim 1 including an O-ring received in the first door to seal against the relatively rigid top of the perforate dust receptacle.
Claim 8
Dependent Claim
244 words
A vacuum cleaner comprising: a body having an inlet for dust laden air and an outlet; a first door pivotally mounted to the body and containing the inlet for dust laden air; an impeller between the inlet and the outlet; a perforate dust receptacle able to filter dust from the dust laden air, the perforate dust receptacle including a relatively rigid top having an opening substantially flush with the top, the remainder of the dust receptacle being a perforate cylinder attached to the top and having at least one wall; an inlet pipe extending from the inlet for dust laden air, through the flexible gasket in said opening, and into the perforate dust receptacle when the first door is closed so that the dust receptacle when the first door is closed so that the dust does not escape from the perforate dust receptacle; a flap formed flush with the top of the perforate dust receptacle, the flap including means for raising and folding the flap over the opening to seal the opening for disposal of the perforate dust receptacle without loss of the dust; said inlet pipe having an outlet remote from the lid said inlet pipe being directed at said at least one wall whereby dust laden air entering the receptacle is filtered to remove dust and the dust laden air, forced against said at least one wall by the impeller, acts to keep said at least one wall free of dust accumulation.
Claim 9
Dependent Claim
244 words
A vacuum cleaner comprising: a body having an inlet for dust laden air and an outlet; a first door pivotally mounted to the body and containing the inlet for dust laden air; an impeller between the inlet and the outlet; a perforate dust receptacle able to filter dust from the dust laden air, the perforate dust receptacle including a relatively rigid top having an opening substantially flush with the top, the remainder of the dust receptacle being a perforate cylinder attached to the top and having at least one wall; an inlet pipe extending from the inlet for dust laden air, through the flexible gasket in said opening, and into the perforate dust receptacle when the first door is closed so that the dust receptacle when the first door is closed so that the dust does not escape from the perforate dust receptacle; a flap formed flush with the top of the perforate dust receptacle, the flap including means for raising and folding the flap over the opening to seal the opening for disposal of the perforate dust receptacle without loss of the dust; said inlet pipe having an outlet remote from the lid said inlet pipe being directed at said at least one wall whereby dust laden air entering the receptacle is filtered to remove dust and the dust laden air, forced against said at least one wall by the impeller, acts to keep said at least one wall free of dust accumulation.
References Cited (Backward Citations)
US2958893A
Cited
US3524211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |