US5024484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable sitting device
Assignee: Individual
•
Filing: 1990-08-15
•
Granted: 1991-06-18
•
Expires: 2010-08-15
Abstract
Abstract An adjustable sitting device, e.g. a chair with the mutual angle between the seat and the back rest being adjustable, if desired, with simultaneous adjustment of the level of the seat and the back rest, said seat and/or back rest being turnable about an axis that is essentially coincident with an imaginary axis through the hip joints of the user. The lower portion of the back rest has a circle sector shaped cross section and the rear portion of said seat has a correcponding circle sector shaped cross section with a circle sector shaped mounting plate inserted between said portions for a sliding support of said back seat and seat portions.
Inventors
- 👤 Jurek Buchacz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:49
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C1/00; A47C1/02; A47C1/022; A47C1/024; A47C1/0244
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
An adjustable sitting device having a seat, a backrest and means to alter the mutual angle between the seat and the back rest, said seat and/or back rest being turnable about an imaginary axis located above the seat and in front of the backrest wherein the back rest comprises frame members extending downward from the back rest and into a respective curved portion, the seat comprises at least a pair of runners attached to a seat frame, and a support means is located underneath said seat frame, said seat frame having an opening therein to provide access from above to said support means and said support means being interconnected from below to a chair subframe, said frame members slidably engaging a set of slide shoes located at the rear of the seat frame and said runners slidably engaging sets of slide shoes located on said support and extending through the opening, and control means extending between and being attached to a front region of at least one of said frame members and a front region of said seat frame to control and selectively, set the distance between said regions.
Claim 2
Dependent Claim
189 words
An adjustable sitting device having a seat, a backrest and means to alter the mutual angle between the seat and the back rest, said seat and/or back rest being turnable about an imaginary axis located above the seat and in front of the backrest wherein the back rest comprises frame members extending downward from the back rest and into a respective curved portion, the seat comprises at least a pair of runners attached to a seat frame, and a support means is located underneath said seat frame, said seat frame having an opening therein to provide access from above to said support means and said support means being interconnected from below to a chair subframe, said frame members slidably engaging a set of slide shoes located at the rear of the seat frame and said runners slidably engaging sets of slide shoes located on said support and extending through the opening, and control means extending between and being attached to a front region of at least one of said frame members and a front region of said seat frame to control and selectively, set the distance between said regions.
Claim 3
Dependent Claim
27 words
An adjustable sitting device as defined in claim 1, wherein said curved portion of said frame members and said runners have substantially the same radius of curvature.
Claim 4
Dependent Claim
25 words
An adjustable sitting device as defined in claim 1, wherein said support comprises engagement means to lockably engage at least one of said frame members.
Claim 5
Dependent Claim
24 words
An adjustable sitting device as defined in claim 1, wherein said support comprises engagement means to lockably engage at least one of said runners.
Claim 6
Dependent Claim
42 words
An adjustable sitting device as defined in claim 1, wherein said frame members and said runners are made from anyone of the group of tubular circular rods, circular solid rods, tubular rods of rectangular cross section, solid rods of rectangular cross section.
Claim 7
Dependent Claim
21 words
An adjustable sitting device as defined in claim 1, wherein said means for controlling and selectively setting includes a gas cylinder.
References Cited (Backward Citations)
CH66397A
Cited
GB913918A
Cited
US3284135A
Cited
DE2735522A1
Cited
US4372608A
Cited
US4386805A
Cited
US4408800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-17 | 1994-12-17 | 1995-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-17 | 1998-12-17 | 1999-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-17 | 2002-12-17 | 2003-06-18 | $7700.00 | Window Closed / Lapsed |