Chair with adjustable seat and back rest

Details Chair with adjustable seat and back rest Chair with adjustable seat and back rest

1989-10-13

1991-12-03

Dorner, Kenneth J.

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

297306, 297345, 267158, H47C 300

Patent

active

050694960

ABSTRACT:
A chair wherein the leg contains a gas spring which can be actuated to raise or lower a carrier for the seat and back rest. The seat is rigid wtih the carrier but the back rest is pivotally connected with the seat by hinge which contains a torque bar tending to pivot the back rest forwardly. Such pivoting of the back rest is normally prevented by a damper which operates between the carrier and a support at the lower end of the back rest and can be blocked to maintain the back rest in a selected angular position. The damper can be unblocked by a first mechanism at one side of and beneath the seat, and the gas spring can be activated by a mechanism beneath the other side of the seat.

REFERENCES:
patent: 2019138 (1935-10-01), Kliesrath et al.
patent: 4200332 (1980-04-01), Brauning
patent: 4408800 (1983-10-01), Knapp
patent: 4537445 (1985-08-01), Neuhoff
patent: 4561693 (1985-12-01), Brownlie et al.
patent: 4603905 (1986-08-01), Stucki
patent: 4747640 (1988-05-01), Locher
patent: 4900085 (1990-02-01), Tobler

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