(19)
(11) EP 0 331 122 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.12.1989 Bulletin 1989/50

(43) Date of publication A2:
06.09.1989 Bulletin 1989/36

(21) Application number: 89103517.2

(22) Date of filing: 28.02.1989
(51) International Patent Classification (IPC)4: A61G 15/00
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 04.03.1988 US 164164
18.08.1988 US 233966
15.12.1988 US 285185
12.01.1989 US 296915

(71) Applicant: SIEMENS AKTIENGESELLSCHAFT
80333 München (DE)

(72) Inventors:
  • McCrackin, Hugh-James
    Pineville, NC 28134 (US)
  • Leffler, Dennis Frank
    Charlotte, NC 28210 (US)


(56) References cited: : 
   
       


    (54) Articular headrest mechanism


    (57) A headrest tilting mechanism includes a bar (6) having first and second ends, with a headrest mounting portion proximate the first end and a substantially straight portion proximate the second end. A support means (10,12) includes a curved cam surface (18) and a pin (14) having ends rotatably coupled to the support means (10,12). The pin (14) has a cross-slot (16) therethrough and a portion of the bar (6) which is intermediate the first and second ends passes through the cross-slot (16). A cam following means (20) attached to the bar (6) proximate the second end causes the second end to follow the cam surface (18) of the support means (10,12). With this arrangement, the curved cam surface (18) is not located at the very top of the chair back (2) and therefore the head of the patient can be significantly closer to the lap of the dentist than prior art arrangements.







    Search report