US4711491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swivel tilt mechanism for chair
Assignee: Individual
•
Filing: 1986-06-09
•
Granted: 1987-12-08
•
Expires: 2006-06-09
Abstract
Abstract A chair includes a base, a member attached to the base and a seat support pivotable with respect to the member along a generally horizontal axis. The pivoting axis is disposed in parallel with and adjacent to a front edge of the seat. A backrest is hingedly connected to the seat. The seat has extreme forward and back tilt positions which may be selected in accordance with the task that is to be performed.
Inventors
- 👤 Jonathan Ginat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/443; A47C3/00; A47C3/02; A47C3/025; A47C3/026; A47C7/441; A47C7/445
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A chair comprising: a base; a member mounted on said base; a seat support pivotably attached to said member; spring means for urging said seat support towards a rest position with respect to said member; and tilting means for changing said rest position, wherein said tilting means comprises a flat member with variable thickness disposed between said member and said seat support, said flat member being shiftable to change the distance between said member and said seat support.
Claim 2
Dependent Claim
78 words
A chair comprising: a base; a member mounted on said base; a seat support pivotably attached to said member; spring means for urging said seat support towards a rest position with respect to said member; and tilting means for changing said rest position, wherein said tilting means comprises a flat member with variable thickness disposed between said member and said seat support, said flat member being shiftable to change the distance between said member and said seat support.
Claim 3
Dependent Claim
31 words
The chair of claim 1 further comprising a backrest hingedly connected to said seat support and resilient means for urging said backrest towards a backrest position with respect to said seat.
Claim 4
Dependent Claim
22 words
The chair of claim 2 wherein said resilient means comprises a leaf spring disposed tangentially between said backrest and said seat support.
Claim 5
Dependent Claim
77 words
A chair comprising: a base; a member mounted on said base; a seat support pivotably attached to said member; spring means for moving said seat support towards a rest position with respect to said member; and a tilting lever which abuts a front position of said seat support and is movable such that the distance between said member and said seat support is changed whereby the height of said front position of said seat is also changed.
Claim 6
Dependent Claim
77 words
A chair comprising: a base; a member mounted on said base; a seat support pivotably attached to said member; spring means for moving said seat support towards a rest position with respect to said member; and a tilting lever which abuts a front position of said seat support and is movable such that the distance between said member and said seat support is changed whereby the height of said front position of said seat is also changed.
Claim 7
Dependent Claim
13 words
The chair of claim 4 wherein said member comprises a substantially vertical shaft.
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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |