US3756552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle seat support
Assignee: Carl Bruns Werkzeugfabrik GmbH
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Filing: 1972-03-06
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Granted: 1973-09-04
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Expires: 1992-03-06
Abstract
Abstract A seat support incorporates a parallelogram linkage pivotally connected between the seat and a base support member for pivotal movement in a fore and aft direction, a compression spring positioned between the seat and the base, and an adjustment spindle rotatably mounted in the seat for adjusting the bias on the spring for regulating the effective stiffness of the seat support.
Inventors
- 👤 G Wilhelms
- 👤 W Stichnoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:49
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/50; B60N2/502; B60N2/505; B60N2/506; B60N2/507; B60N2/54; B60N2/544
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A seat support adapted for use in a vehicle, comprising a base member, a seat frame, a parallelogram linkage pivotally connected between said base member and said frame for pivotal movement in a fore and aft direction, a suspension unit including a spring pivotally connected at its lower end to said base member, guide means at the front of said seat frame slotted in a downward and rearward direction to slidably receive the upper end of said suspension unit, and adjustment means carried by said seat frame at the front edge thereof for positioning the upper end of said suspension unit at an adjustably selected position in said seat frame, said adjustment means comprising a movably mounted adjustment element having an inclined plane surface thereon engaging an upper portion of said suspesion unit, and a screw spindle journaled in said frame for moving said adjustment element relative to said seat frame.
Claim 2
Dependent Claim
151 words
A seat support adapted for use in a vehicle, comprising a base member, a seat frame, a parallelogram linkage pivotally connected between said base member and said frame for pivotal movement in a fore and aft direction, a suspension unit including a spring pivotally connected at its lower end to said base member, guide means at the front of said seat frame slotted in a downward and rearward direction to slidably receive the upper end of said suspension unit, and adjustment means carried by said seat frame at the front edge thereof for positioning the upper end of said suspension unit at an adjustably selected position in said seat frame, said adjustment means comprising a movably mounted adjustment element having an inclined plane surface thereon engaging an upper portion of said suspesion unit, and a screw spindle journaled in said frame for moving said adjustment element relative to said seat frame.
Claim 3
Dependent Claim
23 words
A seat support according to claim 1 wherein said inclined plane surface makes an acute angle with the plane of said seat frame.
Claim 4
Dependent Claim
41 words
A seat support according to claim 2 wherein sAid slotted portion of said seat frame is provided by a U-shaped guide element fastened to the lower surface of said frame, and said adjustment element is slidably supported by said guide element.
Claim 5
Dependent Claim
29 words
A seat support according to claim 3 further comprising an anti-friction surface formed of plastic and disposed between the abutting surfaces of said guide element and said adjustment element.
Claim 6
Dependent Claim
37 words
A seat support according to claim 1 comprising indicator means connected to said adjustment element and visible through a slot in the front of said seat frame for indicating the position of adjustment of said adjustment element.
Claim 7
Dependent Claim
31 words
A seat support according to claim 5 wherein said indicator means includes at least one indicator mark on said seat frame adjacent said slot, and an element slidable in said slot.
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |