Patent US3863978A successfully refreshed from Google Patents.
US3863978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knee-chair
Assignee: Individual
•
Filing: 1973-04-17
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Granted: 1975-02-04
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Expires: 1993-04-17
Abstract
Abstract A body supporting structure is shaped in a way so that the user may rest in a combination of sitting and kneeling positions.
Inventors
- 👤 Jr Peter Richard Gillings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:00
CPC Classifications
B; B62; B62M; B62M27/00; B62M27/02; A; A47; A47C; A47C7/00; A47C7/02; A47C7/029; A47C7/50; A47C7/503; A47C9/00; A47C9/002; A47C9/005; A47C9/02; A47C9/027; B62B; B62B13/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A structure for supporting the human body with the trunk and torso generally upright comprising a first section having a saddle-shaped surface upon which the buttocks may rest with the thighs downwardly straddling the saddle-shaped surface and including downwardly and forwardly extending concave surfaces which merge smoothly with a second section, said second section including rearwardly facing upright concave surfaces to restrain the respective knees against forward motion only, and a third section merging smoothly with said second section having means to support the respective legs from below in a substantially horizontal position.
Claim 2
Dependent Claim
93 words
A structure for supporting the human body with the trunk and torso generally upright comprising a first section having a saddle-shaped surface upon which the buttocks may rest with the thighs downwardly straddling the saddle-shaped surface and including downwardly and forwardly extending concave surfaces which merge smoothly with a second section, said second section including rearwardly facing upright concave surfaces to restrain the respective knees against forward motion only, and a third section merging smoothly with said second section having means to support the respective legs from below in a substantially horizontal position.
Claim 3
Dependent Claim
25 words
The invention defined in claim 1, wherein said third section is provided with a pair of horizontal channelled surfaces merging with said rearwardly concave surfaces.
Claim 4
Dependent Claim
35 words
The invention defined in claim 1, wherein the inner portions of said structure below said first section diverge downwardly and outwardly to permit said structure to be stacked in nesting relationship upon another similar structure.
Claim 5
Dependent Claim
36 words
The invention defined in claim 1, wherein said structure is secured to the frame of a self-propelled vehicle in a position to enable the user of said structure to operate a control means of said vehicle.
Claim 6
Dependent Claim
23 words
The invention defined in claim 1, wherein said structure also includes a fourth section to restrain the trunk and torso against rearward movement.
Claim 7
Dependent Claim
34 words
The invention defined in claim 5, wherein said fourth section is provided with a forwardly directed concave surface merging with said saddle-shaped surface and conforming generally to the lumbar region of a human body.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |