Patent US3765639A successfully refreshed from Google Patents.
US3765639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle chair having a resiliently supported seat
Assignee: Individual
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Filing: 1970-11-09
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Granted: 1973-10-16
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Expires: 1990-11-09
Abstract
Abstract A vehicle chair capable of automatic adjustment in accordance with occupant weight. The chair is supported by spring means acting through a lever. To adjust the chair for different occupant weight the lever is respositioned automatically by first releasing the normal coupling between seat, lever, and spring; and second, the lever is positioned in accordance with occupant weight. Then the coupling between seat, lever, and spring is reestablished for normal operation. In one embodiment the lever is moved relative to its pivot to adjust for weight variations. In another embodiment the application of force to the lever from the seat is shifted for purposes of compensation.
Inventors
- 👤 K Mystrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:24
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/50; B60N2/503; B60N2/505; B60N2/506; B60N2/509
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A vehicle chair in which a seat is supported on a frame by spring means acting thrOugh a fixed lever arm wherein said lever arm is automatically adjusted to compensate for varying occupant weight comprising: a. means for releasably coupling said seat to a second frame to allow, when released, relative movement between said seat and said second frame, b. means for releasably coupling said second frame to said lever arm, c. manually actuated means for releasing both said couplings and fixing said frame with respect to said second frame when said seat is unoccupied, d. second spring means coupling said seat, said second frame and said lever arm to automatically adjust said lever arm in accordance with occupant weight when said seat is occupied, e. wherein the length of said lever arm is automatically adjusted in accordance with occupant weight and said chair is capable of normal use when said manually actuated means is restored.
Claim 2
Dependent Claim
156 words
A vehicle chair in which a seat is supported on a frame by spring means acting thrOugh a fixed lever arm wherein said lever arm is automatically adjusted to compensate for varying occupant weight comprising: a. means for releasably coupling said seat to a second frame to allow, when released, relative movement between said seat and said second frame, b. means for releasably coupling said second frame to said lever arm, c. manually actuated means for releasing both said couplings and fixing said frame with respect to said second frame when said seat is unoccupied, d. second spring means coupling said seat, said second frame and said lever arm to automatically adjust said lever arm in accordance with occupant weight when said seat is occupied, e. wherein the length of said lever arm is automatically adjusted in accordance with occupant weight and said chair is capable of normal use when said manually actuated means is restored.
Claim 3
Dependent Claim
19 words
The vehicle chair of claim 1 wherein said lever arm is adjusted by displacement relative to a pivot point.
Claim 4
Dependent Claim
29 words
The vehicle chair of claim 1 wherein said lever arm is adjusted by varying the point on said lever arm at which a load is applied from said seat.
Claim 5
Dependent Claim
21 words
The vehicle chair of claim 1 wherein said lever arm is adjusted by varying the attack point position of said spring.
Claim 6
Dependent Claim
21 words
The vehicle chair of claim 1 wherein said manually actuated means further locks said second frame to said frame when actuated.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |