Chair improvement structure

Details Chair improvement structure Chair improvement structure

2005-01-11

2005-01-11

Cuomo, Peter M. (Department: 3636)

Chairs and seats

Back movement resiliently opposed in operating position

Back and bottom adjust in a fixed relationship

C297S302100, C297S300100, C297S300200, C297S300400, C297S313000, C297S316000, C297S325000

Reexamination Certificate

active

06840578

ABSTRACT:
A chair has a seat connected to a support leg in an up and down angularly displaceable manner, elastic elements for propping up a rear end of the seat to a higher position, and a mechanism for limiting position of the seat when the seat seats people; the mechanism has an adjustment rod, a gear turnable together with the adjustment rod, an elastic plate for engaging the gear so as to prevent rotation of the gear when the adjustment rod isn't operated, and eccentric cams for holding the seat at desired position when the chair seats people; the cams can turn together with the adjustment rod, and are each formed with a stopping edge having several sections; thus, the depressed position of the seat, i.e. the position when the seat seats people, is decided by the position of the cams, and the seat can move accordingly when the sitter leans forwards.

REFERENCES:
patent: 4763950 (1988-08-01), Tobler
patent: 5810439 (1998-09-01), Roslund, Jr.
patent: 6523897 (2003-02-01), Pan
patent: 6582019 (2003-06-01), Insalaco et al.
patent: 6588844 (2003-07-01), Stenzel
patent: 20020190556 (2002-12-01), Wilkerson et al.

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