US3827718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel chair
Assignee: Individual
•
Filing: 1973-05-30
•
Granted: 1974-08-06
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Expires: 1993-05-30
Abstract
Abstract A wheel chair having a main framework supported by a pair of spaced main wheels rotatably mounted adjacent a rear portion thereof, and by casters carried by a pair of spaced housings mounted adjacent opposite ends of a front portion thereof. A swinging frame is pivotally mounted on each housing. A pair of caster supports is pivotally mounted on each swinging frame on opposite sides of the pivot thereof. Casters are rotatably mounted on the caster supports to support the front portion of the wheel chair. A stop bar is mounted on each of the housings and extends transversely of the swinging frame in the path of one of the casters on the swinging frame so that if the other caster on that swinging frame moves over an edge of a step, that one of the casters engages the stop bar to arrest movement of the wheel chair.
Inventors
- 👤 P Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:13
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/063; A61G5/10; A61G5/1005; A61G5/101; A61G5/1013; A61G5/1018; B; B62; B62B; B62B5/00; B62B5/02; A61G2203/00; A61G2203/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A wheel chair which comprises a main framework, a main support wheel means rotatably mounted on the main framework adjacent a rear portion thereof, a housing mounted on the main framework adjacent a front portion thereof, a swinging frame pivotally mounted on the housing below the housing, a pair of caster supports pivotally mounted on the swinging frame on opposite sides of the pivot thereof, casters rotatably mounted on the caster supports, and a stop bar mounted on the housing in the path of one of the casters, said one of the casters engaging the stop bar when the other caster moves over the edge of a step to arrest movement of the wheel chair.
Claim 2
Dependent Claim
115 words
A wheel chair which comprises a main framework, a main support wheel means rotatably mounted on the main framework adjacent a rear portion thereof, a housing mounted on the main framework adjacent a front portion thereof, a swinging frame pivotally mounted on the housing below the housing, a pair of caster supports pivotally mounted on the swinging frame on opposite sides of the pivot thereof, casters rotatably mounted on the caster supports, and a stop bar mounted on the housing in the path of one of the casters, said one of the casters engaging the stop bar when the other caster moves over the edge of a step to arrest movement of the wheel chair.
Claim 3
Dependent Claim
54 words
A wheel chair as in claim 1 wherein there is means in the housing rotatably mounting the stop rod for turning in a direction to permit rearward movement of the caster engaged thereby and means for preventing rotation of the stop rod in a direction to permit forward movement of the caster engaged thereby.
Claim 4
Dependent Claim
130 words
A wheel chair which comprises a main framework, a pair of spaced main support wheels rotatably mounted on the main framework adjacent a rear portion thereof, a pair of spaced housings mounted on the main framework adjacent opposite ends of a front portion thereof, a swinging frame pivotally mounted on each housing below the housing, a pair of caster supports pivotally mounted on the swinging frame on opposite sides of the pivot thereof, casters rotatably mounted on the caster supports, and a stop bar mounted on the housing and extending transversely of the swinging frame in the path of one of the casters, said one of the casters engaging the stop bar when the other caster moves over an edge of a step to arrest movement of the wheel chair.
Claim 5
Dependent Claim
130 words
A wheel chair which comprises a main framework, a pair of spaced main support wheels rotatably mounted on the main framework adjacent a rear portion thereof, a pair of spaced housings mounted on the main framework adjacent opposite ends of a front portion thereof, a swinging frame pivotally mounted on each housing below the housing, a pair of caster supports pivotally mounted on the swinging frame on opposite sides of the pivot thereof, casters rotatably mounted on the caster supports, and a stop bar mounted on the housing and extending transversely of the swinging frame in the path of one of the casters, said one of the casters engaging the stop bar when the other caster moves over an edge of a step to arrest movement of the wheel chair.
Claim 6
Dependent Claim
45 words
A wheel chair as in claim 3 wherein there is a second stop rod extending lengthwise of the swinging frame inboard thereof on each housing, the second stop rod being in the path of said one of the casters when the wheel chair is turned.
Claim 7
Dependent Claim
105 words
In combination with a framework having rear wheel supports, a front support comprising a housing mounted on the framework adjacent a front portion thereof, a swinging frame pivotally mounted on the housing below the housing, a pair of caster supports pivotally mounted on the swinging frame on opposite sides of the pivot thereof, casters rotatably mounted on the caster supports, and a stop bar mounted on the housing in the path of a rear one of the casters, said rear one of the casters engaging the stop bar when the other caster moves over the edge of a step to arrest movement of the framework.
Claim 8
Dependent Claim
105 words
In combination with a framework having rear wheel supports, a front support comprising a housing mounted on the framework adjacent a front portion thereof, a swinging frame pivotally mounted on the housing below the housing, a pair of caster supports pivotally mounted on the swinging frame on opposite sides of the pivot thereof, casters rotatably mounted on the caster supports, and a stop bar mounted on the housing in the path of a rear one of the casters, said rear one of the casters engaging the stop bar when the other caster moves over the edge of a step to arrest movement of the framework.
References Cited (Backward Citations)
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |