Motor-adjustable head support for a dental treatment chair

Details Motor-adjustable head support for a dental treatment chair Motor-adjustable head support for a dental treatment chair

1988-07-21

1989-06-20

Aschenbrenner, Peter A.

Chairs and seats

Headrest

Angularly movable about horizontal axis

248118, 2482811, 297391, A47C 738

Patent

active

048404292

ABSTRACT:
The invention is directed to an adjustable head support for a dental treatment chair, which is a reclining chair with an adjustable head rest or support. In order to better match the kinematics of the adjustable head support to a natural tilting motion of a patient's head, it is proposed that a quadrilateral linkage pivotally connects an upper region of the back rest to the head rest and the connection of the linkage to the head rest is shifted as the head rest tilts to cause a point on the head rest to move in an arc having a center roughly in the cervical vertebra joint of the patient lying in the chair.

REFERENCES:
patent: 3065029 (1962-11-01), Spound et al.
patent: 3817576 (1974-06-01), Ciavattoni et al.
patent: 4366985 (1983-01-01), Leffler
patent: 4466663 (1984-08-01), Oishi et al.
patent: 4515406 (1985-05-01), Fujiyama
patent: 4720146 (1988-01-01), Mawbey et al.
patent: 4733913 (1988-03-01), Tateyama

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