Gas spring arrangement, especially for a backrest support for of

Details Gas spring arrangement, especially for a backrest support for of Gas spring arrangement, especially for a backrest support for of

1985-09-09

1987-02-10

Dorner, Kenneth J.

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

297355, 297375, A47C 1027

Patent

active

046418865

ABSTRACT:
In a gas spring arrangement, comprising a gas spring disposed between two elements which are pivotable in relation to one another around a pivot axis, which damps the pivot movement, and a mechanical arrangement with an activating lever for the releasable adjustment of the pivot movement, especially for the adjustment of the inclination of the backrest of office chairs, it is provided, on the one hand, to make possible a simple damping of the pivotal movement of the backrest support part relative to the seat carrier and, on the other hand, to make possible the easily operable yet still secure locking of this pivotal movement, that the gas spring (19) is fastened between two transverse struts (bolts 23, 27), each disposed on an element (seat carrier 4, backrest support 7) parallel to the pivot axis (6), that the mechanical adjustment means (29) has a sheath part (31) and a pistion part (30) longitudinally movable in the sheath part (31), that both the sheath part (31) and the piston part (30) are each connected with one of the transverse struts (bolts 23, 27) and are disposed approximately parallel to the gas spring (19), and that the sheath part (31) has a lateral threaded bore (bore 39, threaded top 40), into which a threaded bolt (42) disposed at the front end of the activating lever (43) can be screwed in such a way, that the piston part (30) can be braced against the sheath part (31).

REFERENCES:
patent: 2834402 (1958-05-01), Lautier et al.
patent: 3024067 (1962-03-01), Brandoli
patent: 3758092 (1973-09-01), McGregor
patent: 3893730 (1975-07-01), Homier et al.
patent: 4200332 (1980-04-01), Brauning
patent: 4270797 (1981-06-01), Brauning

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