Adjustment device for the back of a chair

Details Adjustment device for the back of a chair Adjustment device for the back of a chair

2000-02-08

2000-11-14

Brown, Peter R.

Chairs and seats

Movable back

Tiltable

297362, A47C 1025

Patent

active

061459305

ABSTRACT:
An adjustment device for a chair back comprises a fixed member, a frame member, an engaging member and a controlling member. The fixed member is fixed to a bottom of the seat, and has a toothed portion projecting out from the seat. The frame member is fixed to the chair back. The frame member is pivoted to the fixed member, and has a cog rotatably disposed on said toothed portion. A spring is connected to both the fixed member and the frame member to bias the frame member and the chair back toward the seat. The engaging member is movably disposed on the cog. A steel rope is connected to the controlling member and the engaging member such that the engaging member can separate from the cog for permitting the frame member to be pivoted on the fixed member, and let the chair back to be adjusted when the controlling member is moved.

REFERENCES:
patent: 3931996 (1976-01-01), Yoshimura
patent: 5718481 (1998-02-01), Robinson
patent: 5899533 (1999-05-01), Tatematsu et al.
patent: 6007153 (1999-12-01), Benoit et al.

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