Patent US3589769A successfully refreshed from Google Patents.
US3589769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nding wheelchair
Assignee: Individual
•
Filing: 1969-05-19
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Granted: 1971-06-29
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Expires: 1989-05-19
Abstract
Abstract A wheelchair for lifting a person paralyzed from the midthorasic region down is provided which consists of a wheeled framework mounting parallel rod frame coupled to a seatback frame, the seat frame being actuated by a spring motor which straightens the seat and seatback to a position 10* less than vertical to provide standing support for the paralyzed person.
Inventors
- 👤 Peter W Bressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:48
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/14; A61G2200/00; A61G2200/30; A61G2200/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A wheelchair comprising a frame having a pair of longitudinal members, wheels rotatably mounted on said members, vertical members affixed to the longitudinal members, seat arms pivoted to the vertical members, lateral means extending between and supported by said arms in all positions of pivoting, seatback frame members pivoted to the seat arms, motor means in the vertical members operative between the frame and the seat arms to elevate the seat arms and coupling means between the seat arms and vertical members to normally maintain the seat arms and seatback substantially at 90* to each other and upon elevating the seat arms to relatively rock the seatback and increase the angle between the seat arms and seatback and provide a generally continuous generally vertical support.
Claim 2
Dependent Claim
125 words
A wheelchair comprising a frame having a pair of longitudinal members, wheels rotatably mounted on said members, vertical members affixed to the longitudinal members, seat arms pivoted to the vertical members, lateral means extending between and supported by said arms in all positions of pivoting, seatback frame members pivoted to the seat arms, motor means in the vertical members operative between the frame and the seat arms to elevate the seat arms and coupling means between the seat arms and vertical members to normally maintain the seat arms and seatback substantially at 90* to each other and upon elevating the seat arms to relatively rock the seatback and increase the angle between the seat arms and seatback and provide a generally continuous generally vertical support.
Claim 3
Dependent Claim
53 words
A wheelchair as in claim 1 wherein the seat arms comprise two arm units, the first unit being pivoted to the vertical members and the second unit being pivoted to the first on a spaced axis and wherein the seatback frame is pivoted to the first and second arm units on spaced axes.
Claim 4
Dependent Claim
29 words
A wheelchair as in claim 1 wherein the seat arms have a segment of a gear secured thereto and the motor means has a rack engaging the gear segment.
Claim 5
Dependent Claim
19 words
A wheelchair as in claim 1 including articulated spreader bars between the seat arms and between the longitudinal members.
Claim 6
Dependent Claim
25 words
A wheelchair as in claim 4 wherein the spreader bar between the longitudinal members mounts a pair of foot pad assemblies on tortionally biased sleeves.
Claim 7
Dependent Claim
22 words
A wheelchair as in claim 1 wherein a knee pad is detachably fastened between the seat arms adjacent the pivot point thereof.
Claim 8
Dependent Claim
24 words
A wheelchair as in claim 1 wherein the seating cushions are cylindrical foam filled units detachably secured to the seat arms and seatback frame.
Claim 9
Dependent Claim
27 words
A wheelchair as in claim 2 wherein the first arm unit is coupled to a segmental gear and the motor means has a rack engaging the gear.
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |