US3921744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheelchair with detachable drive means
Assignee: Individual
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Filing: 1974-10-02
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Granted: 1975-11-25
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Expires: 1994-10-02
Abstract
Abstract A wheelchair has a detachable drive means so that it is useful both indoors under manual power and outdoors under motor power. The drive means is manipulable by the occupant himself, and to this end comprises a drive wheel and motor with steering handle bars, and means to detachably interconnect this assembly at each side of the wheelchair. The connecting means comprises ramps that guide laterally sliding pins toward their sockets, and rotatable cams received in vertical slots at the forward ends of the wheelchair armrests.
Inventors
- 👤 Robert Benoit
- 👤 Andre Mairet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:26
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/04; A61G5/047; A61G5/10; A61G5/1051; A61G5/1005; A61G5/1013; A61G5/1018
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
In combination, a wheelchair and a drive assembly for said wheelchair, said drive assembly comprising a motor and a wheel driven by said motor disposed forwardly of said wheelchair, and means carried by said drive assembly and extending rearwardly of said motor and driven wheel to both sides of said wheelchair for detachably connecting said drive assembly to said wheelchair, said means including means disposed on opposite sides of said wheelchair when said drive assembly is connected to said wheelchair and within reach of and manipulable by the hands of the occupant of the wheelchair to effect the connection and disconnection of said drive assembly to and from said wheelchair.
Claim 2
Dependent Claim
110 words
In combination, a wheelchair and a drive assembly for said wheelchair, said drive assembly comprising a motor and a wheel driven by said motor disposed forwardly of said wheelchair, and means carried by said drive assembly and extending rearwardly of said motor and driven wheel to both sides of said wheelchair for detachably connecting said drive assembly to said wheelchair, said means including means disposed on opposite sides of said wheelchair when said drive assembly is connected to said wheelchair and within reach of and manipulable by the hands of the occupant of the wheelchair to effect the connection and disconnection of said drive assembly to and from said wheelchair.
Claim 3
Dependent Claim
40 words
Apparatus as claimed in claim 1, said connecting means comprising ramps on each side of said wheelchair guiding rearwardly extending portions of said drive assembly toward seats on said wheelchair for the interconnection of said drive assembly with said wheelchair.
Claim 4
Dependent Claim
34 words
Apparatus as claimed in claim 2, and pins carried by the portions of said drive assembly that are received in said seats for sliding movement into and out of interconnecting relationship with said wheelchair.
Claim 5
Dependent Claim
22 words
Apparatus as claimed in claim 3, said seats comprising upwardly open recesses carried by said wheelchair at the summit of said ramps.
Claim 6
Dependent Claim
36 words
Apparatus as claimed in claim 1, said connecting means comprising means on said wheelchair defining vertical slots at each side of the wheelchair, and vertically swinging means on said drive assembly selectively engageable in said slots.
Claim 7
Dependent Claim
39 words
Apparatus as claimed in claim 5, said vertically swinging means comprising cam means actuated by levers for engaging in said slots and for pressing rearwardly against said wheelchair at the base of said slots to tilt the wheelchair rearwardly.
Claim 8
Dependent Claim
19 words
Apparatus as claimed in claim 6, said slots being disposed at the forward ends of armrests of the wheelchair.
Claim 9
Dependent Claim
29 words
Apparatus as claimed in claim 1, and vertically adjustable legs that cooperate with said wheel to support said drive assembly when the drive assembly is detached from the wheelchair.
Claim 10
Dependent Claim
36 words
Apparatus as claimed in claim 1, the wheelchair having large rear wheels, and brake means carried by the drive assembly and positionable adjacent said large rear wheels when the drive assembly is connected to the wheelchair.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |