Adjustable chair

Details Adjustable chair Adjustable chair

1982-05-14

1984-09-18

Zugel, Francis K.

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

297316, 297320, 297355, A47C 1032

Patent

active

044719949

ABSTRACT:
At a seat carrier 4 of a chair, a backrest 5 is pivotally connected. A seat which rests on the seat carrier 4 and the backrest can be interdependently adjusted in their inclination. For return into the resting position and to fix in any desired position, a gas pressure spring 10 and, if necessary, additional springs 11 are provided. The one end of the gas pressure spring 10 engages at the free end of a thrust lever 15 which is pivotally held at the backrest 5, wherein this pivot axis 7 is arranged at a distance from the pivot axis 6 between the backrest 5 and the seat carrier 4. A lever arm 16 which is pivotally attached at the seat carrier 4 also engages at this thrust lever 15 at a distance from its pivot axis 7. The thrust lever 15 can perform a relative motion with respect to the backrest 5 by means of the arrangement of the lever arm 16. Therefore a relatively small movement of the backrest 5 results in a correspondingly larger movement of the gas pressure spring 10.

REFERENCES:
patent: 799128 (1905-09-01), Wilmot et al.
patent: 2745467 (1956-05-01), Vale
patent: 2859799 (1958-11-01), Moore
patent: 3602537 (1971-08-01), Kerstholt
patent: 3837704 (1974-09-01), Bauer
patent: 4143910 (1979-03-01), Geffers et al.
patent: 4200332 (1980-04-01), Brauning
patent: 4270797 (1981-06-01), Brauning

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