EP 0303145 B1 19910814 - MOTORISED ADJUSTABLE HEADREST FOR A DENTAL TREATMENT CHAIR
Title (en)
MOTORISED ADJUSTABLE HEADREST FOR A DENTAL TREATMENT CHAIR
Publication
Application
Priority
DE 3727204 A 19870814
Abstract (en)
[origin: US4840429A] 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.
IPC 1-7
IPC 8 full level
A61G 15/00 (2006.01); A61G 15/12 (2006.01)
CPC (source: EP US)
A61G 15/125 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR IT SE
DOCDB simple family (publication)
EP 0303145 A1 19890215; EP 0303145 B1 19910814; DE 3864215 D1 19910919; DE 8717434 U1 19881027; JP H0515301 Y2 19930422; JP S6431732 U 19890227; US 4840429 A 19890620
DOCDB simple family (application)
EP 88112484 A 19880801; DE 3864215 T 19880801; DE 8717434 U 19870814; JP 10737388 U 19880812; US 22251688 A 19880721