US4618185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ergonomic chair
Assignee: Individual
•
Filing: 1985-09-18
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Granted: 1986-10-21
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Expires: 2005-09-18
Abstract
Abstract An ergonomic chair comprising: a substantially rigid seat structure (2,2'), a substantially rigid back structure (1,1'), articulated to the seat structure, a base (5,5') resting on the floor, a legs structure comprising on each side a pair of crossing legs (3,3', 4,4'), one (4,4') of which is articulated at the upper end to the front portion of the seat structure (2,2'), is provided with a slider (8,8') for the other leg (3,3') and is bound at the lower end to the base (5,5'), whereas the other leg (3,3'), which is elastically bending deformable, is articulated at the upper end to the back structure (1,1'), leans against a back stud (9,9') applied to the seat structure (2,2') engages with the slider (8,8') foreseen in the other leg (4,4') and is bound at the lower end to the base (5,5').
Inventors
- 👤 Yaacov Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:13
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02; A47C3/021; A47C3/023; A47C1/00; A47C1/02; A47C1/022; A47C1/028; A47C1/029; A47C4/00; A47C4/02; A47C4/03
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
An ergonomic chair characterized in that it comprises: a substantially rigid seat structure (2,2'), a substantially rigid back structure (1,1'), articulated to the seat structure, a base (5,5') resting on the floor, a legs structure comprising on each side a pair of crossing legs (3,3',4,4'), one (4,4') of which is articulated at the upper end to the front portion of the seat structure (2,2'), is provided with a slider (8,8') for the other leg (3,3') and is bound at the lower end to the base (5,5'), whereas the other leg (3,3'), which is elastically bending deformable, is articulated at the upper end to the back structure (1,1'), leans against a back stud (9,9') applied to the seat structure (2,2'), engages with the slider (8,8') foreseen in the other leg (4,4') and is bound at the lower end to the base (5,5').
Claim 2
Dependent Claim
141 words
An ergonomic chair characterized in that it comprises: a substantially rigid seat structure (2,2'), a substantially rigid back structure (1,1'), articulated to the seat structure, a base (5,5') resting on the floor, a legs structure comprising on each side a pair of crossing legs (3,3',4,4'), one (4,4') of which is articulated at the upper end to the front portion of the seat structure (2,2'), is provided with a slider (8,8') for the other leg (3,3') and is bound at the lower end to the base (5,5'), whereas the other leg (3,3'), which is elastically bending deformable, is articulated at the upper end to the back structure (1,1'), leans against a back stud (9,9') applied to the seat structure (2,2'), engages with the slider (8,8') foreseen in the other leg (4,4') and is bound at the lower end to the base (5,5').
Claim 3
Dependent Claim
27 words
Chair according to claim 1 characterized in that the two crossing legs (3,4) of each pair are integral with a longitudinal portion (5) resting on the floor.
Claim 4
Dependent Claim
43 words
Chair according to claim 1 characterized in that the upper ends of the corresponding legs (3,4) of each pair are connected to each other through a transversal rod (7,6) to which the back structure (1) and the seat structure (2) are respectively articulated.
Claim 5
Dependent Claim
17 words
Chair according to claim 1 characterized in that each leg (3',4') is articulated to the base (5').
Claim 6
Dependent Claim
20 words
Chair according to claim 4 characterized in that the bond between the whole elements mutually moving is of removable kind.
Claim 7
Dependent Claim
37 words
Chair according to claim 3 characterized in that the base (5') consists of a substantially stiff tubular C-shaped element forward openend to which the lower end of the crossing legs (3',4') are articulated at its side portions.
Claim 8
Dependent Claim
32 words
Chair according to claim 1 characterized in that each stud (9,9') applied to the seat structure (2,2') consists of a block having the rest surface for the leg (3,3') adjustable in position.
Claim 9
Dependent Claim
47 words
Chair according to claim 7 characterized in that each stud (9,9') consists of a block articulated to the seat structure (2, 2') and provided of several rest surfaces for the corresponding leg (3,3'), said surfaces being placed at different distance from the articulation pin of the block.
Claim 10
Dependent Claim
16 words
Chair according to claim 8 characterized in that the two blocking elements (9,9') are rotatably bound.
Claim 11
Dependent Claim
35 words
Chair according to claim 2 characterized in that the slider provided on each leg (4) consists of a pair of studs (8) spaced apart in a way corresponding to the widest movements of the chair.
References Cited (Backward Citations)
US196126A
Cited
US1377600A
Cited
GB400876A
Cited
US2135833A
Cited
US2273980A
Cited
FR946197A
Cited
US2981315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |