Patent US4677940A successfully refreshed from Google Patents.
US4493488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control wheel chair seat
Assignee: PANAIA DAVID J 48 PILGRIM ROAD EAST LONGMEADOW 01028
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Filing: 1982-02-16
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Granted: 1985-01-15
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Expires: 2002-02-16
Abstract
Abstract A wheel chair seat comprised of a one piece rigid configuration that offers stable support allowing controlled height seating and having a special cushion comprised of varying density foam sections that assist the user therapeutically in preventing ulcerated areas on the buttocks. Apparatus is provided for pivoting the support with the cushion attached thereto as the wheel chair is folded.
Inventors
- 👤 David J. Panaia
- 👤 Walter C. Lovell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1043; A61G5/08; A61G5/0808; A61G5/0816; A61G5/0825; A61G5/0891; A61G5/1054; A61G5/1091; A61G7/00; A61G7/05; A61G7/057; A61G7/05715; Y; Y10; Y10S; Y10S297/00; Y10S297/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
217 words
A folding wheel chair including wheels, folding cross frames between the wheels of the chair, and tubular side frame members forming parts of the cross frames, a rigid wheel chair seat comprising a single rigid support having a flat bottom member and raised side edges, said cross frames being in a plane at right angles to the wheels, said flat bottom member having an underside, first structural members attached to the underside of said flat bottom member, said first structural members having end portions, second structural members having end portions, connection means for pivotally and slidably connecting said second frame members to said first frame members near the center of said support, said connection means including a pin in each of said second structural members for engaging a slot in each of said first structural members, and means located at the outer end portions of said first and second structural members for pivotably and releasably securing said structural members to said tubular side frame members, wherein said structural members pivot about said connection while said outer end portions remain secured to said tubular side frame members when said seat is pivoted from a horizontal seating position to a vertical folded position in which said seat is generally parallel with and between the wheels of the wheel chair.
Claim 2
Dependent Claim
217 words
A folding wheel chair including wheels, folding cross frames between the wheels of the chair, and tubular side frame members forming parts of the cross frames, a rigid wheel chair seat comprising a single rigid support having a flat bottom member and raised side edges, said cross frames being in a plane at right angles to the wheels, said flat bottom member having an underside, first structural members attached to the underside of said flat bottom member, said first structural members having end portions, second structural members having end portions, connection means for pivotally and slidably connecting said second frame members to said first frame members near the center of said support, said connection means including a pin in each of said second structural members for engaging a slot in each of said first structural members, and means located at the outer end portions of said first and second structural members for pivotably and releasably securing said structural members to said tubular side frame members, wherein said structural members pivot about said connection while said outer end portions remain secured to said tubular side frame members when said seat is pivoted from a horizontal seating position to a vertical folded position in which said seat is generally parallel with and between the wheels of the wheel chair.
Claim 3
Dependent Claim
41 words
In the wheel chair of claim 1, a cushion, said cushion having areas of different configurations and densities providing for maximum comfort and avoiding discomfort, the cushion being mounted on the seat and held in place by the raised side edges.
Claim 4
Dependent Claim
18 words
In the wheel chair of claim 2, the areas of different densities including coccyx, perineum, trochanter, and thighs.
Claim 5
Dependent Claim
30 words
The wheel chair of claim 2 including inclined edges on the support, the cushion having an edge configuration matching the support and means securing the cushion from sliding or shifting.
Claim 6
Dependent Claim
18 words
The wheel chair of claim 1 including means adjustably to raise and lower a portion of the support.
Claim 7
Dependent Claim
36 words
In the wheel chair of claim 1 including hooks on the outer ends of said first and second structural members, and means for locking the hooks to the tubular side frame members of the wheel chair.
Claim 8
Dependent Claim
16 words
The wheel chair of claim 6 wherein the hooks are adjustable to vary the seat height.
Claim 9
Dependent Claim
29 words
The wheel chair of claim 7 wherein said hooks are threaded and include a threaded collar to secure the bight of the hook to a respective tubular frame member.
Claim 10
Dependent Claim
18 words
The wheel chair of claim 8 including a resilient washer for each hook placed to absorb road shock.
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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) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |