Backrest adjustment device

Details Backrest adjustment device Backrest adjustment device

2005-06-28

2008-11-11

Edell, Joseph F (Department: 3636)

Chairs and seats

Bottom or back with means to alter contour

Providing support for lower back region

Reexamination Certificate

active

07448684

ABSTRACT:
A backrest adjustment device includes a bottom board, a support board movable relative to the bottom board, and two opposite linkages pivotally mounted between the support board and the bottom board to drive the support board to move relative to the bottom board to change the distance between the support board and the bottom board. Thus, the two linkages are pivoted to drive the support board to move relative to the bottom board to change the distance between the support board and the bottom board so as to adjust the position of the backrest relative to the seat.

REFERENCES:
patent: 1743377 (1930-01-01), Nadell
patent: 4678230 (1987-07-01), Winkle
patent: 5088790 (1992-02-01), Wainwright et al.
patent: 6092871 (2000-07-01), Beaulieu
patent: 6695402 (2004-02-01), Sloan, Jr.
patent: 2002/0130541 (2002-09-01), Koo
patent: 582821 (1994-02-01), None

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