Device for adjusting the reclining force in office chair...

Details Device for adjusting the reclining force in office chair... Device for adjusting the reclining force in office chair...

2006-04-24

2010-12-14

Barfield, Anthony D (Department: 3636)

Chairs and seats

Back movement resiliently opposed in operating position

Adjustable resistance

C297S303400

Reexamination Certificate

active

07850237

ABSTRACT:
A device for adjusting the reclining force in office chair mechanisms comprising at least two mutually hinged parts and elastic means (16) which maintain said parts elastically spaced apart, said device being characterized by comprising:—at least two levers (7, 6), at least one of which interacts with said elastic means (16) and the other of which is connected to one of said hinged parts, said levers respectively interacting via at least one movable contact element (13) by way of contact surfaces,—means (9, 10, 14) for adjusting the position of said movable contact element (13) such as to modify the points at which said movable contact element bears on said contact surfaces and consequently such as to modify the lever arms.

REFERENCES:
patent: 4744600 (1988-05-01), Inoue
patent: 4858993 (1989-08-01), Steinmann
patent: 6712428 (2004-03-01), Moreschi
patent: 7080884 (2006-07-01), Daeschle et al.
patent: 2004/0195883 (2004-10-01), Vrijlandt et al.
patent: 1 258 211 (2002-11-01), None
patent: 1 258 212 (2002-11-01), None

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