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:
Nov. 14, 1989
Filed:
Jun. 03, 1988
Egon Brauning, Weil am Rhein, DE;
Protoned B.V., Amsterdam, NL;
Abstract
A seat (2) is mounted pivotably about a first axle (A1) on the stand (1) of the chair. The seat frame (8) is connected to a second axle (A2) which is fastened to the backrest (3) behind the backrest (3) at a horizontal distance from the latter and at a vertical distance from the first axle (A1). The backrest (3) produced from an elastically resilient material, when deflected out of its vertical position, causes the second axle (A2) to move over an arc of a circle of radius A.sub.1 -A.sub.2 ; the rear seat portion adjacent to the backrest (3) is also lowered correspondingly thereby. The backrest (3) extending over the entire height of the chair forms with its lower portion an integral component of the chair stand (1). In comparison with the known complicated and heavy backrest/seat adjustment mechanisms, a cost-effective and lightweight construction, but one which fully satisfies modern ergonomic requirements as regards sitting comfort, is proposed here.