Dental chair headrest locking device

Details Dental chair headrest locking device Dental chair headrest locking device

1977-06-24

1978-09-05

Mitchell, James C.

Chairs and seats

Headrest

Adjustable rectilinearly vertically

248414, A47C 110

Patent

active

041114833

ABSTRACT:
A headrest mounted to the top of a dental chair backrest can readily be positioned by means of a headrest bar engaging a locking device affixed to the chair backrest. The locking device comprises a pair of resilient rubber surfaces which grip or contact the headrest bar to positively lock the headrest in position. By merely pushing the headrest to a more vertical position, the gripping or contacting of the rubber surfaces to the headrest bar is substantially eliminated to thus permit positioning of the headrest. Release of headrest will return it once again to a locked position.

REFERENCES:
patent: 2827110 (1958-03-01), Rising
patent: 3635527 (1972-01-01), Weber
patent: 3642321 (1972-02-01), Schwarz
patent: 3698765 (1972-10-01), Olsen

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