Patent US3708824A successfully refreshed from Google Patents.
US3708824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction-cleaning implement
Assignee: Individual
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Filing: 1971-01-22
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Granted: 1973-01-09
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Expires: 1991-01-22
Abstract
Abstract A pneumatic suction-cleaning implement for use with a vacuum cleaner on rugs, and the like, comprising a suction nozzle structure having wall means movable over a surface to be cleaned. Means is provided defining first and second nozzle openings on spaced-apart levels in said wall means, and valve means is provided for selectively directing suction flow between said first and second openings in order to clean at a lower level deep-down at the base of the nap of a high-pile rug or at an upper level on the top of the rug.
Inventors
- 👤 S Holubinka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:47
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A pneumatic suction air flow cleaning implement for rugs and the like comprising a suction nozzle structure having wall means movable over a surface to be cleaned, means defining a first and a second series of suction inlet openings in said wall means at respective and substantially spaced-apart levels, and valve means for selectively proportioning the suction flow between said first and said second series of suction inlet openings.
Claim 2
Dependent Claim
69 words
A pneumatic suction air flow cleaning implement for rugs and the like comprising a suction nozzle structure having wall means movable over a surface to be cleaned, means defining a first and a second series of suction inlet openings in said wall means at respective and substantially spaced-apart levels, and valve means for selectively proportioning the suction flow between said first and said second series of suction inlet openings.
Claim 3
Dependent Claim
41 words
The suction cleaning implement of claim 1 wherein said first and second suction inlet openings are arranged at spaced-apart intervals in a line and said second inlet openings are provided at the lower end of spaced-apart and downwardly projecting hollow teeth.
Claim 4
Dependent Claim
56 words
The suction cleaning implement of claim 2 wherein said teeth have open upper ends on a level adjacent said first openings, and said valve means includes a member slidable along said line, said member having a plurality of valve apertures defined therein at spaced-apart intervals adapted to line up alternately with said first and second openings.
Claim 5
Dependent Claim
38 words
The suction cleaning implement of claim 3 including control means for moving said valve member between a first position blocking said first openings and a second position blocking off flow through said second openings in said hollow teeth.
Claim 6
Dependent Claim
44 words
The suction cleaning implement of claim 4 wherein said nozzle structure includes longitudinal groove means in communication with said first and second openings, said valve means being mounted in said groove means for movement between opposite ends thereof between said first and second positions.
Claim 7
Dependent Claim
97 words
A pneumatic suction cleaning implement for rugs and the like comprising a suction chamber having a bottom wall for movement over a surface to be cleaned, means defining a plurality of spaced-apart suction holes in said bottom, a plurality of spaced-apart, hollow fingers projecting downwardly of said bottom walls, saiD fingers having the hollow portions opening at the lower end for suction cleaning and in communication at the upper end with the interior of said suction chamber, and manual valve means movable between alternate positions blocking said suction holes and the upper end of said fingers, respectively.
Claim 8
Dependent Claim
97 words
A pneumatic suction cleaning implement for rugs and the like comprising a suction chamber having a bottom wall for movement over a surface to be cleaned, means defining a plurality of spaced-apart suction holes in said bottom, a plurality of spaced-apart, hollow fingers projecting downwardly of said bottom walls, saiD fingers having the hollow portions opening at the lower end for suction cleaning and in communication at the upper end with the interior of said suction chamber, and manual valve means movable between alternate positions blocking said suction holes and the upper end of said fingers, respectively.
Claim 9
Dependent Claim
48 words
The suction cleaning implement of claim 6 wherein each of said fingers comprises a hollow tubular wall having a lower end defining a suction opening, and an opening means formed in said tubular wall above the level of said lower end and on at least one side thereof.
References Cited (Backward Citations)
US963049A
Cited
US2219802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |