US4076308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair
Assignee: Wilkhahn Wilkening and Hahne GmbH and Co KG
•
Filing: 1977-05-19
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Granted: 1978-02-28
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Expires: 1997-05-19
Abstract
Abstract The chair described has a single support leg carrying a support plate. An elongate member is pivotally secured to the support plate. A back rest is rigidly secured to the rear end of the elongate member while a seat portion bearing support is pivotally secured to the front end of the elongate member. Separate means are provided on the support plate to vary the inclination of the rear end of the elongate member, and therefore the back rest, and to vary the inclination of the bearing support and therefore the seat portion which it supports.
Inventors
- 👤 Siegfried Slabon
- 👤 Klaus Franck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:34
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/448; A47C1/00; A47C1/02; A47C1/022; A47C1/024; A47C1/0244; A47C3/00; A47C3/02; A47C3/025; A47C3/026
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
148 words
In a chair, leg means, a support plate carried by the leg means, an elongate member having a front edge portion, an intermediate portion, and a rear edge portion, pivot means pivotally supporting the intermediate portion of the elongate member to the support plate, a back rest secured to the rear edge portion of the elongate member, a piston and cylinder assembly coupling the rear edge portion of the elongate member to the support plate and being operable to allow the inclination of the back rest to be varied, a seat portion bearing plate, coupling means pivotally securing the bearing plate along the front edge of the elongate member, and resilient pad means slidably mounted on the support plate to carry an intermediate portion of the bearing plate, the resilient pad means being slidable to vary the inclination of the bearing plate with respect to the support plate.
Claim 2
Dependent Claim
148 words
In a chair, leg means, a support plate carried by the leg means, an elongate member having a front edge portion, an intermediate portion, and a rear edge portion, pivot means pivotally supporting the intermediate portion of the elongate member to the support plate, a back rest secured to the rear edge portion of the elongate member, a piston and cylinder assembly coupling the rear edge portion of the elongate member to the support plate and being operable to allow the inclination of the back rest to be varied, a seat portion bearing plate, coupling means pivotally securing the bearing plate along the front edge of the elongate member, and resilient pad means slidably mounted on the support plate to carry an intermediate portion of the bearing plate, the resilient pad means being slidable to vary the inclination of the bearing plate with respect to the support plate.
Claim 3
Dependent Claim
88 words
A chair according to claim 1 wherein the piston and cylinder assembly includes a cylinder secured to the elongate member, a piston slidably housed in the cylinder and having a piston rod secured to the support plate, a release member projecting from the piston rod and operable upon displacement to equalise the pressure in the cylinder and thus allow relative displacement between the piston and cylinder, release of the release member, locking the piston and cylinder against relative displacement, and a lever pivotable to displace the release member.
Claim 4
Dependent Claim
24 words
A chair according to claim 2 including an actuating rod rotatably supported by the support plate and rotatable to cause the lever to pivot.
Claim 5
Dependent Claim
44 words
A chair according to claim 1 wherein the resilient pad means comprises a pair of resilient pads supported on slide surfaces said support plate to lie on opposite sides of the elongate member and to project above the upper extremity of the elongate member.
Claim 6
Dependent Claim
60 words
A chair according to claim 4 wherein said slide surfaces of the support plate define guide slots, and including for each pad a bolt extending through a corresponding guide slot into screw threaded engagement with the pad, to constrain the pad for movement along said slot and when the bolt is tightened to lock the pad to the support plate.
Claim 7
Dependent Claim
49 words
A chair according to claim 1 wherein the front edge portion of the elongate member is in the form of a planar tongue, and wherein the coupling means comprises a pocket secured to the front edge portion of the bearing plate, the tongue being force fitted into the pocket.
Claim 8
Dependent Claim
34 words
In a chair, a support plate, an elongate member having two opposite end portions and pivotally supported on the support plate, a back rest rigid with the elongate member at one end portion thereof,
Claim 9
Dependent Claim
34 words
In a chair, a support plate, an elongate member having two opposite end portions and pivotally supported on the support plate, a back rest rigid with the elongate member at one end portion thereof,
Claim 10
Dependent Claim
57 words
a seat portion pivotally secured to the elongate member at the other end portion, first means coupling the support plate and the one end portion of the elongate member to vary the angle of inclination of the back rest and second means coupling the support plate and the seat portion to vary theinclination of the seat portion
Claim 11
Dependent Claim
57 words
a seat portion pivotally secured to the elongate member at the other end portion, first means coupling the support plate and the one end portion of the elongate member to vary the angle of inclination of the back rest and second means coupling the support plate and the seat portion to vary theinclination of the seat portion
Claim 12
Dependent Claim
16 words
A chair according to claim 7 wherein the first means comprises a piston and cylinder assembly.
Claim 13
Dependent Claim
37 words
A chair according to claim 7 wherein the second means comprises resilent pad means slidably mounted on the support plate slidable in a sense to vary the relative inclination between the seat portion on the support plate.
References Cited (Backward Citations)
US1216755A
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US2310346A
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US2463257A
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US2687166A
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US2818911A
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US3712666A
Cited
US3784147A
Cited
US3880465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |