Chair adjustable device

Details Chair adjustable device Chair adjustable device

2007-11-13

2007-11-13

Dunn, David (Department: 3636)

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

C297S300700, C297S301600, C297S463100, C297S301700, C297S301400

Reexamination Certificate

active

11206848

ABSTRACT:
A chair adjustable device includes a base with which a seat frame and a backrest frame are respectively and pivotably connected. A positioning mechanism is connected to the base and includes an operation handle which is able to shift a transmission frame and a positioning plate is movably connected to the transmission frame and biased by a spring, so that the positioning plate can be movably engaged with one of notches defined in a positioning member on the seat frame. The seat frame and the backrest frame are connected by a connection member so that the chair can be adjusted its tilt angle by operating the operation handle.

REFERENCES:
patent: 4779925 (1988-10-01), Heinzel
patent: 4966411 (1990-10-01), Katagiri et al.
patent: 5762399 (1998-06-01), Liu
patent: 6033020 (2000-03-01), Ito
patent: 6276755 (2001-08-01), Su
patent: 6921134 (2005-07-01), Hong
patent: 7080884 (2006-07-01), Daeschle et al.

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