Dental chair

Details Dental chair Dental chair

1974-04-05

1976-01-27

McCall, James T.

Chairs and seats

Movable bottom

Tiltable

297 71, 297 90, 297354, 297423, A61G 1500, A47C 1602

Patent

active

039349314

ABSTRACT:
A dental chair which comprises a seat, a back inclinable relative to said seat, first means for effecting inclination of said back, second means for pushing the front portion of said seat upward, and third means operable in response to overinclination of said back beyond the normal inclination thereof to drive said second means so as to raise the front portion of said seat relative to the rear portion thereof.

REFERENCES:
patent: 847880 (1907-03-01), Barker et al.
patent: 1287958 (1918-12-01), Giberson
patent: 2136852 (1938-11-01), Knauth
patent: 2535687 (1950-12-01), Lorenz
patent: 2760559 (1956-08-01), Austin
patent: 3284135 (1966-11-01), Hiramatsu
patent: 3330595 (1967-07-01), Svard
patent: 3381997 (1968-05-01), Fritz et al.
patent: 3427072 (1969-02-01), Hale

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