US3820310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner inlet baffle
Assignee: Singer Co
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Filing: 1973-01-29
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Granted: 1974-06-28
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Expires: 1993-01-29
Abstract
Abstract A wet/dry utility vacuum cleaner including a dirt receptacle having an inlet aperture. A baffle is mounted behind the inlet within the receptacle to divert the incoming dirt and/or liquid ladden air tangentially downwardly. The construction of the baffle is such that it may flex or yield to allow trapped dirt to dislodge upon emptying the receptacle. One embodiment of the baffle is a thin sheet of polethylene film. A second embodiment is a rigid member having a hinged flap.
Inventors
- 👤 C Fromknecht
- 👤 J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:32
CPC Classifications
A; A47; A47L; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0028; A47L7/0038; A47L7/0042; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; Y; Y10; Y10S; Y10S55/00; Y10S55/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
In a vacuum cleaner having an open top dirt receptacle including a suction inlet aperture formed in the receptacle, a baffle mounted behind the inlet within the receptacle, said baffle being substantially larger than said inlet aperture and normally abutting said receptacle above said inlet and at one side thereof and spaced from said receptacle below and at the other side of said inlet for diverting air entering the inlet tangentially downwardly, said baffle having at least a pliant foldable portion, said portion folding solely by the force of gravity toward said inlet aperture when the receptacle is upright and away from said inlet aperture when said receptacle is inverted.
Claim 2
Dependent Claim
110 words
In a vacuum cleaner having an open top dirt receptacle including a suction inlet aperture formed in the receptacle, a baffle mounted behind the inlet within the receptacle, said baffle being substantially larger than said inlet aperture and normally abutting said receptacle above said inlet and at one side thereof and spaced from said receptacle below and at the other side of said inlet for diverting air entering the inlet tangentially downwardly, said baffle having at least a pliant foldable portion, said portion folding solely by the force of gravity toward said inlet aperture when the receptacle is upright and away from said inlet aperture when said receptacle is inverted.
Claim 3
Dependent Claim
19 words
In a vacuum cleaner as recited in claim 1 wherein said baffle comprises a sheet of plastic film material.
Claim 4
Dependent Claim
51 words
In a vacuum cleaner as recited in claim 2 wherein said sheet is fastened to the receptacle about said inlet at three locations, two of said locations being laterally spaced above said inlet, and the other of said locations being below said inlet on said abutting one side of said inlet.
Claim 5
Dependent Claim
18 words
In a vacuum cleaner as recited in claim 1 wherein said baffle comprises a sheet of polyethylene film.
Claim 6
Dependent Claim
19 words
In a vacuum cleaner as recited in claim 4 wherein the thickness of the film is approximately 0.10 inch.
Claim 7
Dependent Claim
44 words
In a vacuum cleaner as recited in claim 1 wherein said baffle comprises a unitary plastic member having a first portion thereof secured to said receptacle above said inlet, said pliant portion including a flap formed to said first portion by a living hinge.
Claim 8
Dependent Claim
14 words
In a vacuum cleaner as recited in claim 6 wherein said baffle comprises polypropylene.
Claim 9
Dependent Claim
39 words
In a vacuum cleaner as recited in claim 7 wherein the thickness of said living hinge is within a range of 0.012 to 0.015 inches and the thickness of said first portion and said flap is approximately 0.080 inches.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |