Dental chair

Details Dental chair Dental chair

1977-01-28

1978-04-11

McCall, James T.

Chairs and seats

Movable bottom

Tiltable

297 71, 297330, A47C 102

Patent

active

040836002

ABSTRACT:
A dental chair having a backrest and a seat each of which is angularly adjustable about a common horizontal axis. A motor drives a linkage system which simultaneously angularly adjusts both backrest tilt and seat inclination to positions ranging from one in which the chair supports the patient in substantially sitting position, to one in which the patient is reclining with his head below the rest of his body. As compared to the seat, the angular motion of the backrest is relatively uniform over the range of adjustment, whereas most of the angular motion of the seat occurs during the middle 50% of the range.

REFERENCES:
patent: 3014757 (1961-12-01), Pilcher et al.
patent: 3338632 (1967-08-01), Kleinsorge
patent: 3414324 (1968-12-01), Taylor
patent: 3427072 (1969-02-01), Hale
patent: 3588170 (1971-06-01), Knabusch
patent: 3804460 (1974-04-01), Leffler
patent: 3934929 (1976-01-01), Rabinowitz

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