Patent US4136888A successfully refreshed from Google Patents.
US4136888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transport device for invalids
Assignee: United States Department of Health and Human Services
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Filing: 1977-10-07
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Granted: 1979-01-30
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Expires: 1997-10-07
Abstract
Abstract A tubular metal chair frame covered with canvas with a two-wheeled pivoted upwardly foldable front end and a pivoted rear support stand with two swivelled additional wheels, the support stand being lockable in a normal rearward position with the swivelled wheels engaging the floor and spaced rearwardly from the two front wheels. The support stand is foldable upwardly and can be locked in an elevated position, substantially coplanar with the upper portion of the frame. The lower portion of the frame is provided with a pair of parallel tread belts mounted on supports having rollers underlying the belts, the belts being located behind the front wheels and being usable to engage the edges of steps when the chair and its occupant are moved down stairs. Foldable handles are provided on the front end of the frame.
Inventors
- 👤 William R. Bowie, Jr.
- 👤 George B. Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:17
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/06; A61G5/061; A61G5/066
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
235 words
A transport device for handicapped persons comprising frame means, support means on said frame means structured to receive a person, said frame means being provided with depending front wheel means, movable friction means on the frame means rearwardly adjacent said front wheel means and located to engage on the edge of a step to receive the weight of said transport device as the front wheel means rolls over said edge in descending the step, and means causing said friction means to move responsive to said weight in a direction to allow downward movement of said frame means over said edge, wherein said frame means includes rearwardly offset side-reinforcing bars at its opposite side edges, said reinforcing bars extending substantially parallel to said opposite side edges and defining a storage space therebetween, upwardly foldable wheeled rear support means pivoted to said frame means and being receivable at times in said space between said side-reinforcing bars so as to be substantially coplanar with the upper portion of said frame means, and pivoted strut bar means on the rear support means, said strut bar means being provided terminally with spring clamping hook means lockingly engageable with said frame means to at other times lock the wheeled rear support means in a depending downwardly and rearwardly extended operative position relative to the frame means so that the device may be employed as a wheeled chair at said other times.
Claim 2
Dependent Claim
235 words
A transport device for handicapped persons comprising frame means, support means on said frame means structured to receive a person, said frame means being provided with depending front wheel means, movable friction means on the frame means rearwardly adjacent said front wheel means and located to engage on the edge of a step to receive the weight of said transport device as the front wheel means rolls over said edge in descending the step, and means causing said friction means to move responsive to said weight in a direction to allow downward movement of said frame means over said edge, wherein said frame means includes rearwardly offset side-reinforcing bars at its opposite side edges, said reinforcing bars extending substantially parallel to said opposite side edges and defining a storage space therebetween, upwardly foldable wheeled rear support means pivoted to said frame means and being receivable at times in said space between said side-reinforcing bars so as to be substantially coplanar with the upper portion of said frame means, and pivoted strut bar means on the rear support means, said strut bar means being provided terminally with spring clamping hook means lockingly engageable with said frame means to at other times lock the wheeled rear support means in a depending downwardly and rearwardly extended operative position relative to the frame means so that the device may be employed as a wheeled chair at said other times.
Claim 3
Dependent Claim
28 words
The transport device of claim 1, and wherein said movable friction means comprises continuous tread belt means movably mounted on said frame means behind the front wheel means.
Claim 4
Dependent Claim
18 words
The transport device of claim 2, and anti-friction means between said tread belt means and said frame means.
Claim 5
Dependent Claim
44 words
The transport device of claim 3, and wherein said anti-friction means comprises a plurality of rollers journalled to said frame means and being engageable by said tread belt means responsive to the engagement of said tread belt means with the edge of the step.
Claim 6
Dependent Claim
77 words
The transport device of claim 1, and wherein said movable friction means comprises tread belt means movably mounted on said frame means behind the front wheel means, and wherein said tread belt means comprises a horizontally elongated, vertically positioned, peripherally grooved member with rounded opposite ends secured longitudinally to said frame means, a continuous friction belt movably engaged in the peripheral groove of said member, and anti-friction means between the bottom of said member and said belt.
Claim 7
Dependent Claim
24 words
The transport device of claim 1, and a safety belt on said frame means engageable around a person received on said structured support means.
Claim 8
Dependent Claim
16 words
The transport device of claim 1, and wherein said frame means includes upwardly foldable seat-defining means.
Claim 9
Dependent Claim
38 words
The transport device of claim 7, and a safety belt on said frame means engageable around a person received on said structured support means and at times also engageable around said seat-defining means in its upwardly folded position.
Claim 10
Dependent Claim
31 words
The transport device of claim 1, and pivoted latch means on the frame means latchingly engageable with said rear support means in the upwardly folded position of the rear support means.
Claim 11
Dependent Claim
47 words
The transport device of claim 9, and wherein said movable friction means comprises a horizontally elongated, vertically-positioned, generally oval, peripherally grooved member mounted on said frame means rearwardly adjacent said front wheel means, and a continuous friction belt movably mounted in the peripheral groove of said member.
Claim 12
Dependent Claim
17 words
The transport device of claim 10, and anti-friction means between said friction belt and said peripheral groove.
Claim 13
Dependent Claim
45 words
The transport device of claim 10, and handle means pivoted to the front portion of said frame means and being swingable to a forwardly projecting position, and means limiting pivotal movement of said handle means when the handle means is in said forwardly projecting position.
Claim 14
Dependent Claim
25 words
The transport device of claim 12, and wherein said front portion of the frame means is at times foldable upwardly to a nonoperative storage position.
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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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |