Link mechanism for a chair and a chair

Details Link mechanism for a chair and a chair Link mechanism for a chair and a chair

2011-07-05

2011-07-05

Barfield, Anthony D (Department: 3636)

Chairs and seats

Movable bottom

Tiltable

C297S321000

Reexamination Certificate

active

07971936

ABSTRACT:
There is provided a link mechanism for a chair that is a link mechanism that is used at a chair, the link mechanism for a chair having: a first link whose one end is connected to a bottom surface of a link that supports a seat surface portion of the chair; a second link whose one end is connected to another end of the first link; a first joint portion rotatably connecting the first link and the second link; a second joint portion provided at another end of the second link; and a first elastic resistance unit imparting elasticity in a rotating direction to the second joint portion.

REFERENCES:
patent: 4411469 (1983-10-01), Drabert et al.
patent: 4627663 (1986-12-01), LaPointe
patent: 4761033 (1988-08-01), Lanuzzi et al.
patent: 4988145 (1991-01-01), Engel
patent: 5080435 (1992-01-01), Desanta
patent: 1-16488 (1989-03-01), None
patent: 4037438 (1992-02-01), None
patent: 2000-505677 (2000-05-01), None
patent: 2001-29169 (2001-02-01), None
patent: 2007-152145 (2007-06-01), None
Wilkhahn website online “Modus: Function” on the Internet <http://www.wilkhahn.co.jp/products/working/modus/function.html> (searched Jun. 15, 2006).
Office Action mailed on Jan. 21, 2011, issued by the United States Patent and Trademark Office in U.S. Appl. No. 12/923,642 (which is a divisional of the above-identified application).

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