Chair with automatically adjustable tilting back

Details Chair with automatically adjustable tilting back Chair with automatically adjustable tilting back

1979-07-11

1982-06-08

McCall, James T.

Chairs and seats

Back movement resiliently opposed in operating position

Coil spring surrounds horizontal pivot

297DIG1, 297DIG2, 297300, 297337, A47C 512, A47C 740

Patent

active

043336833

ABSTRACT:
A chair comprises a unitary seat and lower back and a separate upper back mounted on the lower back to tilt backward from a yieldably restrained, relatively upright position by at least one resilient articulating linkage. The chair may also have a second seat component nested in and slidable forward and backward on the seat portion of the unitary seat and lower back.

REFERENCES:
patent: 1444521 (1923-02-01), Pearl
patent: 2131609 (1938-09-01), Alexander
patent: 2446185 (1948-08-01), Aasucci et al.
patent: 3027195 (1962-03-01), Nelson et al.
patent: 3982785 (1976-09-01), Ambasz
patent: 4032190 (1977-06-01), Muller-Deisig
patent: 4068889 (1978-01-01), Pierce
patent: 4084850 (1978-04-01), Ambasz
patent: 4115902 (1978-09-01), Taylor
patent: 4193164 (1980-03-01), Okayama

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