US3724797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient seat
Assignee: Stabilus Industrie und Handels GmbH
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Filing: 1971-02-04
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Granted: 1973-04-03
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Expires: 1991-02-04
Abstract
Abstract The seat for a chair or vehicle has two box-shaped portions which telescopically engage each other for vertical expansion and contraction of the seat. A pneumatic spring mounted in the space enclosed by the boxes biases the boxes apart by means of levers carrying links or rollers or by means of cams and rollers. The spring axis is horizontal so that the minimum height of the seat is very small.
Inventors
- 👤 H Freitag
- 👤 W Westerteiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/14; A47C7/142
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
A seat comprising, in combination: a. a base portion; b. a supporting portion defining a plane of support; c. guide means connecting said portions for movement of said supporting portion in a direction transverse to said plane toward and away from said base portion between a plurality of positions, 1. the positions of said plane in said positions of said supporting portion being substantially parallel to each other when said base portion is stationary during said movement; d. a pneumatic spring including a cylinder member having an axis transverse to said direction, piston means received in said cylinder member for axial movement and axially bounding a compartment in said cylinder member, and a piston rod member secured to said piston means for movement therewith inward and outward of said cylinder member; and e. motion transmitting means respectively connecting said members to said portions and keeping said axis approximately parallel to said plane in said positions of the supporting portion.
Claim 2
Dependent Claim
159 words
A seat comprising, in combination: a. a base portion; b. a supporting portion defining a plane of support; c. guide means connecting said portions for movement of said supporting portion in a direction transverse to said plane toward and away from said base portion between a plurality of positions, 1. the positions of said plane in said positions of said supporting portion being substantially parallel to each other when said base portion is stationary during said movement; d. a pneumatic spring including a cylinder member having an axis transverse to said direction, piston means received in said cylinder member for axial movement and axially bounding a compartment in said cylinder member, and a piston rod member secured to said piston means for movement therewith inward and outward of said cylinder member; and e. motion transmitting means respectively connecting said members to said portions and keeping said axis approximately parallel to said plane in said positions of the supporting portion.
Claim 3
Dependent Claim
27 words
A seat as set forth in claim 1, wherein said portions are telescopically engaged and substantially enclose a space therebetween, said spring being mounted in said space.
Claim 4
Dependent Claim
50 words
A seat as set forth in claim 2, wherein said motion transmitting means include two lever members, each lever member being pivotally mounted in said space on one of said portions, and hinge means connecting said lever member to a respective member of said spring and to the other portion.
Claim 5
Dependent Claim
19 words
A seat as set forth in claim 3, wherein said two lever members are mounted on said base portion.
Claim 6
Dependent Claim
24 words
A seat as set forth in claim 4, wherein said hinge means include a link hingedly connecting each lever member to said supporting portion.
Claim 7
Dependent Claim
47 words
A seat as set forth in claim 2, wherein said motion transmitting means include two lever members, each lever member being pivotally mounted in said space on one of said portions and carrying an engaging member, said engaging member movably engaging a face on the other portion.
Claim 8
Dependent Claim
26 words
A seat as set forth in claim 6, wherein said lever members are each mounted on said base portion, and said engaging member is a roller.
Claim 9
Dependent Claim
16 words
A seat as set forth in claim 7, said face being substantially parallel to said plane.
Claim 10
Dependent Claim
52 words
A seat as set forth in claim 2, wherein said motion transmitting means include engaging members on said piston rod member and on said cylinder member respectively, and two cam members on one of said portions, each engaging member movably engaging a respective one of said cam members and the other portion.
Claim 11
Dependent Claim
26 words
A seat as set forth in claim 9, said engaging members being rollers rotatably mounted on said piston rod member and on said cylinder member respectively.
Claim 12
Dependent Claim
43 words
A seat as set forth in claim 1, further comprising adjusting means for varying the rate of said axial movement of the piston means in said cylinder member in response to a force tending to move said supporting portion toward said base portion.
Claim 13
Dependent Claim
55 words
A seat as set forth in claim 11, wherein said adjusting means include means for varying the volume of said compartment while said piston means stands still, said means for varying said volume including an adjustment member rotatable about an axis substantially parallel to said plane and transverse to the axis of said cylinder member.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |