Chair with its backrest adjustable in its angle

Details Chair with its backrest adjustable in its angle Chair with its backrest adjustable in its angle

1991-12-02

1993-06-29

Dorner, Kenneth J.

Chairs and seats

Back movement resiliently opposed in operating position

Constantly oriented during up-and-down movement

297345, 297363, A47C 330

Patent

active

052227839

ABSTRACT:
A chair with its backrest adjustable in its angle comprising a steering rod to keep the backrest upright or tilted in a certain pre-set angle and a control rod to push down a press button of an air pressure cylinder which functions to raise up or lower down the seat of the chair when the control rod is rotated.

REFERENCES:
patent: 635452 (1899-10-01), Walton
patent: 699882 (1902-05-01), Lamplugh et al.
patent: 1986105 (1935-01-01), Foote
patent: 3756654 (1973-09-01), Bauer
patent: 3960406 (1976-06-01), Buker
patent: 4257582 (1981-03-01), Wirges
patent: 4328943 (1982-05-01), Eldon, III
patent: 4603905 (1986-08-01), Stucki
patent: 4832407 (1989-05-01), Serber

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