US4506903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheelchair attachment
Assignee: NDK Inc USA
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Filing: 1983-03-03
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Granted: 1985-03-26
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Expires: 2003-03-03
Abstract
Abstract A device is disclosed for detachably coupling a wheeled oxygen tank cart to a wheelchair such that they are transportable together as a unit without the need of a separate operator of the cart. The device is adjustable in length such that various sizes of wheelchairs may be accommodated. In one embodiment, the oxygen cart rolls in tandem with the wheelchair during use of the device; in another embodiment, the oxygen cart is wholly supported on the wheelchair by the device.
Inventors
- 👤 Sidney P. Bowermaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:01
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A wheelchair attachment device comprising: means for detachably coupling a wheeled oxygen tank cart in tandem with said wheelchair such that said cart is stabilized fore and aft by said wheelchair and supportable vertically by wheels of said cart, said coupling means comprising means for spanning and attaching to horizontally spaced structural members near a base of said wheelchair for supporting and limiting forward movement of said cart, said coupling means further comprising means for attaching said cart to a portion of said wheelchair above said base and limiting rearward tipping of said cart, such that said wheelchair and said cart are rollingly transportable as a unit when coupled.
Claim 2
Dependent Claim
109 words
A wheelchair attachment device comprising: means for detachably coupling a wheeled oxygen tank cart in tandem with said wheelchair such that said cart is stabilized fore and aft by said wheelchair and supportable vertically by wheels of said cart, said coupling means comprising means for spanning and attaching to horizontally spaced structural members near a base of said wheelchair for supporting and limiting forward movement of said cart, said coupling means further comprising means for attaching said cart to a portion of said wheelchair above said base and limiting rearward tipping of said cart, such that said wheelchair and said cart are rollingly transportable as a unit when coupled.
Claim 3
Dependent Claim
24 words
A device as in claim 1, wherein said spanning means further comprises: means for adjusting a length thereof such that different spans are accommodated.
Claim 4
Dependent Claim
18 words
A device as in claim 2, wherein said adjusting means comprises: spring biased telescoping of said spanning means.
Claim 5
Dependent Claim
142 words
A wheelchair attachment device for attaching an oxygen tank cart thereto, said oxygen tank cart including wheels and at least one foot and being self-supportable in a generally vertical orientation by engagement of said at least one foot and said wheels with a horizontal surface comprising: means for detachably coupling said wheeled oxygen tank cart in tandem with said wheelchair such that said cart is stabilized fore and aft by said wheelchair and supportable vertically by wheels of said cart, said coupling means comprising means for spanning and attaching to horizontally spaced structural members near a base of said wheelchair, said means for spanning said cart including means to limit forward movement of said cart, said spanning means including means mounted on said spanning means for engaging said foot and limiting sideways shifting of said cart relative to said wheelchair when attached.
Claim 6
Dependent Claim
142 words
A wheelchair attachment device for attaching an oxygen tank cart thereto, said oxygen tank cart including wheels and at least one foot and being self-supportable in a generally vertical orientation by engagement of said at least one foot and said wheels with a horizontal surface comprising: means for detachably coupling said wheeled oxygen tank cart in tandem with said wheelchair such that said cart is stabilized fore and aft by said wheelchair and supportable vertically by wheels of said cart, said coupling means comprising means for spanning and attaching to horizontally spaced structural members near a base of said wheelchair, said means for spanning said cart including means to limit forward movement of said cart, said spanning means including means mounted on said spanning means for engaging said foot and limiting sideways shifting of said cart relative to said wheelchair when attached.
Claim 7
Dependent Claim
27 words
A device as in claim 4, wherein said cart comprises plural feet and said engaging means receives at least one of said feet for limiting said shifting.
Claim 8
Dependent Claim
30 words
A device as in claim 5, wherein said coupling means is adjustable on said base of said wheel chair whereby wheels of said cart can be supported at varying levels.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |