Harold Y Tai

US Patent:

43759025, Mar 8, 1983

Filed:

Sep 29, 1980

Appl. No.:

6/191367

Inventors:

Harold Y. Tai - Everett WA
Floyd E. Norris - Seattle WA

Assignee:

Royal Dental Manufacturing, Inc. - Everett WA

International Classification:

A47C 710

US Classification:

297408

Abstract:

A dental chair headrest which may be positioned and locked in a predetermined angular orientation relative to the seat back. A support base allows height adjustment and has a headrest frame pivotally connected thereto. The locking mechanism includes a locking shaft pivotally connected to the support base and extending through a bore within a locking block pivotally connected to the headrest frame. Alignment of the locking shaft and bore allows the adjustment of the headrest angle, and pivoting the locking block engages the edges of the bore with the surface of the locking shaft to retain the locking shaft in a predetermined position within the bore. The headrest is covered by a resilient material, and a positioning lever extends from the locking block to a location where the positioning lever may be actuated by pressure on the resilient material to disengage the locking block from the locking shaft.