US4538854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator chair
Assignee: MORETTE'S Ltd
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Filing: 1982-12-13
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Granted: 1985-09-03
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Expires: 2002-12-13
Abstract
Abstract There is provided a chair having a seat portion and an inflatable member under the seat portion. Enveloped by the inflatable member is means for bringing outside air into the inflatable member to inflate it and thus raise the seat portion. In a preferred form, an electrically powered vacuum device would be located within a bag constituting the inflatable member, and thus the bag itself would contribute to muffling the sound of the electrically powered vacuum device.
Inventors
- 👤 Ross E. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:35
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/14; A47; A47C; A47C3/00; A47C3/20; A47C3/30; Y; Y10; Y10S; Y10S297/00; Y10S297/03; Y10S297/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
A chair comprising: a seat portion mounted to be movable between a lower position and a higher position, upright guide means for guiding the movement of the seat portion, an inflatable bag under the seat portion adapted, during inflation, to raise the seat portion toward said higher position, and a vacuum-producing motorized device within and enclosed by the bag for drawing air into the bag along a conduit which passes to the exterior of the bag, thereby to inflate the bag and raise the seat portion, whereby noise from the motorized device is muted by the presence of the surrounding bag, and whereby to efficiently use the space under the seat portion for both the bag and the motorized device.
Claim 2
Dependent Claim
120 words
A chair comprising: a seat portion mounted to be movable between a lower position and a higher position, upright guide means for guiding the movement of the seat portion, an inflatable bag under the seat portion adapted, during inflation, to raise the seat portion toward said higher position, and a vacuum-producing motorized device within and enclosed by the bag for drawing air into the bag along a conduit which passes to the exterior of the bag, thereby to inflate the bag and raise the seat portion, whereby noise from the motorized device is muted by the presence of the surrounding bag, and whereby to efficiently use the space under the seat portion for both the bag and the motorized device.
Claim 3
Dependent Claim
64 words
The chair claimed in claim 1, in which the conduit has a valve means, the chair further including: first control means accessible to one seated on said seat portion for opening said valve means and simultaneously energizing said vacuum-producing motorized device, and second control means accessible to one seated on said seat portion for opening said valve means without energizing said vacuum-producing motorized device.
Claim 4
Dependent Claim
30 words
The chair claimed in claim 1, in which the bag means includes an inner bag which is flexible and air-impermeable, and an outer bag which is flexible and resists stretching.
Claim 5
Dependent Claim
32 words
The chair claimed in claim 1, or claim 2, in which the chair further includes a muffler device connected to said conduit, thereby to further muffle the noise from said motorized means.
Claim 6
Dependent Claim
28 words
The chair claimed in claim 1, or claim 2, in which the said motorized means is substantially completely surrounded by an additional noise-muffling housing within said bag means.
Claim 7
Dependent Claim
23 words
The chair claimed in claim 1, or claim 2, in which the seat portion is connected to a back portion which moves therewith.
Claim 8
Dependent Claim
22 words
The chair claimed in claim 2, in which the first and second control means are on two opposite arms of said chair.
Claim 9
Dependent Claim
20 words
The chair claimed in claim 2, in which the upright guide means are typical slide rails used in filing cabinets.
Claim 10
Dependent Claim
13 words
The chair claimed in claim 8, in which the slide rails incorporate bearings.
References Cited (Backward Citations)
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Cited
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |