Patent US3817575A successfully refreshed from Google Patents.
US3817575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary chair
Assignee: Mauser KG
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Filing: 1973-01-17
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Granted: 1974-06-18
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Expires: 1993-01-17
Abstract
Abstract A rotary chair has an upright support column provided with an internally arranged gas spring device controlled by a valve. A seat has a lower supporting shell and an upper shell connected with the lower shell and adapted to be provided with upholstery. In the interior space surrounded by the shell are located transmission linkages one of which operates the valves of the gas spring and the other of which effects tiltable displacement of a backrest unit mounted on the seat. Pushbuttons are accessible at the exterior lower side of the lower shell and are connected with the linkages so as to operate the same when depressed.
Inventors
- 👤 K Bocksch
- 👤 W Hensel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:06
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/18; A47C3/02; A47C3/025; A47C3/026; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/446
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
In a rotary chair having an upright support column provided with an internally arranged gas spring device which is controlled by valve means having a first actuating portion movable between a rest position and a valve opening position, a combination comprising a seat including a lower supporting shell and an upper shell connected with said lower shell and adapted to be provided with upholstery, said shells defining an internal space with one another; a backrest mounting unit tiltably secured to said seat and having a second actuating portion movable between one position in which said backrest unit can tilt, and another position in which said backrest unit is prevented from tilting; a pair of pushbuttons mounted on said lower shell and accessible at the exterior thereof for depressing by a user; first motiontransmitting means arranged in said space between said shells and operatively associated with said first actuating portion and with one of said pushbuttons for displacing the former to said valve operating position in response to depressing of said one pushbutton; and second motion-transmitting means also arranged in said space between said shells and operatively associated with the other of said pushbuttons and with said second actuating portion for displacing the latter to said one position when said other pushbutton is depressed.
Claim 2
Dependent Claim
213 words
In a rotary chair having an upright support column provided with an internally arranged gas spring device which is controlled by valve means having a first actuating portion movable between a rest position and a valve opening position, a combination comprising a seat including a lower supporting shell and an upper shell connected with said lower shell and adapted to be provided with upholstery, said shells defining an internal space with one another; a backrest mounting unit tiltably secured to said seat and having a second actuating portion movable between one position in which said backrest unit can tilt, and another position in which said backrest unit is prevented from tilting; a pair of pushbuttons mounted on said lower shell and accessible at the exterior thereof for depressing by a user; first motiontransmitting means arranged in said space between said shells and operatively associated with said first actuating portion and with one of said pushbuttons for displacing the former to said valve operating position in response to depressing of said one pushbutton; and second motion-transmitting means also arranged in said space between said shells and operatively associated with the other of said pushbuttons and with said second actuating portion for displacing the latter to said one position when said other pushbutton is depressed.
Claim 3
Dependent Claim
37 words
A combination as defined in claim 1, said mounting unit including two shell sections, central screw means for drawing said shell sections together, and a pin mounted on said lower shell and eccentrically connected with said unit.
Claim 4
Dependent Claim
79 words
A combination as defined in claim 2, further comprising an additional gas spring having said second actuating portion and mounted on said lower shell and including a cylinder articulated to said unit in the region of said central screw means; and said second motion-transmitting means comprising a lever pivotably mounted on said lower shell and acting upon said second actuating portion, and a rod connected with said lever for pivoting the same and being connected with said other pushbutton.
Claim 5
Dependent Claim
66 words
A combination as defined in claim 1, said lower shell having an upper side facing said upper shell and including a conically tapering seat for an upper end of said upright support column, said seat being bounded by an outer circumferential wall; and further comprising a plurality of reinforcing ribs radiating from said wall and having upper edges contacting a lower side of said upper shell.
Claim 6
Dependent Claim
15 words
A combination as defined in claim 1, wherein said shells are of synthetic plastic material.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |