US4804227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Point-synchronized adjustment device for office chairs
Assignee: AHREND-CIRKEL BV PO BOX 4 1160 AA ZWANENBURG
•
Filing: 1987-12-14
•
Granted: 1989-02-14
•
Expires: 2007-12-14
Abstract
Abstract A reclining chair is provided comprising a seat (2) comprised of a rigid supporting shell (7), a back rest (3) freely displaceable in orientation in relation to said seat (2), a rigid seat support (18,9) including at a forward end of the seat a stationary pivot axis (8) where said rigid supporting shell (7) is attached to said rigid seat support (18,9) and about which pivot axis said seat can pivot rearwardly into a reclining position, at least one back stay bar (11), one end (12) of said back stay bar being fixed to said seat support (18,9), and an opposing end (16) of said back stay bar being connected to said back rest (3), and said seat shell (7) including a slide bearing (20), a portion of said back stay (11) being slidably supported on said slide bearing (20), said slide bearing providing positive guidance between the seat shell and the back stay such that when said seat shell reclines over an angle β the back rest reclines over an angle α which is substantially greater than angle β.
Inventors
- 👤 Eckhard Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:34
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032; A47C1/03255
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
204 words
A reclining chair comprising a seat (2) comprised of a rigid supporting shell (7), a back rest (3) freely displaceable in orientation in relation to said seat (2), a rigid seat support means (18,9) including means defining at a forward end of the seat a stationary pivot axis (8) where said rigid supporting shell (7) is attached to said rigid seat support means (18,9) and about which pivot axis said seat can pivot rearwardly into a reclining position, at least one back stay bar (11), one end (12) of said stay bar being fixed to said seat support means (18,9) at pivot axis (12) positioned rearwardly of pivot axis (8), and an opposing end (16) of said back stay bar being connected to said back rest (3), said back stay bar passing through said supporting shell (7), and said seat shell (7) including a slide bearing means (20), a portion of said back stay (11) being slidably supported on said slide bearing means (20), said slide bearing means providing positive guidance between the seat shell and the backstay such that when said seat shell reclines over an angle β the back rest reclines over an angle α which is substantially greater than angle β.
Claim 2
Dependent Claim
204 words
A reclining chair comprising a seat (2) comprised of a rigid supporting shell (7), a back rest (3) freely displaceable in orientation in relation to said seat (2), a rigid seat support means (18,9) including means defining at a forward end of the seat a stationary pivot axis (8) where said rigid supporting shell (7) is attached to said rigid seat support means (18,9) and about which pivot axis said seat can pivot rearwardly into a reclining position, at least one back stay bar (11), one end (12) of said stay bar being fixed to said seat support means (18,9) at pivot axis (12) positioned rearwardly of pivot axis (8), and an opposing end (16) of said back stay bar being connected to said back rest (3), said back stay bar passing through said supporting shell (7), and said seat shell (7) including a slide bearing means (20), a portion of said back stay (11) being slidably supported on said slide bearing means (20), said slide bearing means providing positive guidance between the seat shell and the backstay such that when said seat shell reclines over an angle β the back rest reclines over an angle α which is substantially greater than angle β.
Claim 3
Dependent Claim
14 words
The reclining chair of claim 1 wherein said back stay bar is substantially S-shaped.
Claim 4
Dependent Claim
28 words
The reclining chair of claim 2 wherein said slide bearing means comprises a curved guide for said back stay bar as it extends through said supporting shell (7).
Claim 5
Dependent Claim
28 words
The reclining chair of claim 1 wherein said rigid seat support means (18,9) comprises a vertically oriented pedestal (18) and a supporting seat bracket (9) extending laterally therefrom.
Claim 6
Dependent Claim
43 words
The reclining chair of claim 1 wherein one end of said back stay bar extends upwardly into said back rest (3) and the opposing end extends along and through said supporting shell (7) and is attached to said rigid seat support means (18,9).
References Cited (Backward Citations)
US2365200A
Cited
FR1241452A
Cited
US3525549A
Cited
US4451085A
Cited
US4502729A
Cited
EP0164266A2
Cited
DE3436964A1
Cited
US4685733A
Cited
US4711491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |