Synchronous adjusting device for office chairs or the like

Details Synchronous adjusting device for office chairs or the like Synchronous adjusting device for office chairs or the like

1993-04-07

1994-11-22

Cranmer, Laurie K.

Chairs and seats

Movable bottom

Tiltable

297301, 29734416, A47C 1032

Patent

active

053662741

ABSTRACT:
A synchronous adjusting device for a chair is provided where the restoring movement of a back part is effected as a function of the weight of the user, a restoring moment occurring with the increase in inclination of the backrest. For this purpose, the back part is mounted rotatably relative to the seat part at a distance in height. The leaning force of the user at the back leaning point is counteracted by a restoring force in the lower region of the back part as a result of the articulated connection between the seat part and the back part.

REFERENCES:
patent: 1888471 (1932-11-01), Robbins
patent: 4411469 (1983-10-01), Drabert et al.
patent: 4709962 (1987-12-01), Steinmann
patent: 4747640 (1988-05-01), Locher
patent: 4877291 (1989-10-01), Taylor
patent: 4986601 (1991-01-01), Inoue
patent: 4988145 (1991-01-01), Angel

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