The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1994
Filed:
Jun. 01, 1992
Ulrich Steininger, Darmstadt, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A dental patient chair is provided with a backrest which is arranged inclinably with a backrest carrier on a seat and is adjusted toward and away from the seat so that the backrest carrier and seat are each, respectively, provided with a curved path in which appropriate guide elements are allocated. As a result, the backrest carrier is moved under the seat when the backrest is inclined backward and, in turn, is withdrawn from within the seat when the backrest is moved forward to an upright position. In order to achieve an optimum motion sequence of the backrest, the curvature of the two curved paths of the seat and the backrest are designed so that the momentary pole around which the backrest turns when being inclined is not constant but, on the contrary, moves on a section of a spiral curve which preferably opens upward and proceeds in the same direction as the incline motion of the backrest.