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:
Jun. 14, 1994
Filed:
Jan. 14, 1992
Frederick S Faiks, Greenville, MI (US);
Thomas G Feldpausch, Hastings, MI (US);
Carl V Forslund, III, Grand Rapids, MI (US);
Steelcase Inc., Grand Rapids, MI (US);
Abstract
A chair control includes a flexible truss having tandem springs interconnected in spaced relation so that they interact to provide a unique torque versus displacement profile during flexing, with a portion of one of the springs moving longitudinally relative to a portion of the other spring as they are flexed. A stop on the springs limits the longitudinal movement, thereby limiting the angle of tilt both in the upright and rearward chair back positions. In one form, the springs are pairs of leaf springs connected in tandem and operably attached to a chair back and bottom formed by a corrugated member. In another form, one of the springs is a flexible shell forming a chair with the other spring attached thereto in a nested arrangement. In yet another form, the flexible truss is a separate module installable in furniture as a self-contained energy absorber.