Chair and support mechanism unit thereof

Details Chair and support mechanism unit thereof Chair and support mechanism unit thereof

2007-11-13

2007-11-13

Brown, Peter R. (Department: 3636)

Chairs and seats

Back movement resiliently opposed in operating position

Back adjusts independent of seat

C297S303500

Reexamination Certificate

active

11345630

ABSTRACT:
A chair is provided with a base6fixed at an upper end of a leg pillar5, a back support unit13attached to the base6so as to tilt backward, a backrest3attached to the back support unit13, and a spring unit14supporting the backward tilt of the back support unit13. The spring unit14is to expand and contract in a back and forth direction when viewed from above and arranged further behind than a tilt supporting point 16aof the back support unit13. The back support unit13, the spring unit14, and the base6constitute a kind of link mechanism and the spring unit14will expand and contract mainly at the front end, while tilting backward.

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