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:
May. 09, 2006
Filed:
Feb. 01, 2005
Daryl Knoblock, Legal Representative, Fort Collins, CO (US);
Arnold B. Dammermann, Winona, MN (US);
Larry Dekraker, Holland, MI (US);
Kurt R. Heidmann, Grand Rapids, MI (US);
Gordon J. Peterson, Rockford, MI (US);
Charles P. Roossien, Wyoming, MI (US);
David S. Teppo, East Grand Rapids, MI (US);
Daryl Knoblock, legal representative, Fort Collins, CO (US);
Arnold B. Dammermann, Winona, MN (US);
Larry DeKraker, Holland, MI (US);
Kurt R. Heidmann, Grand Rapids, MI (US);
Gordon J. Peterson, Rockford, MI (US);
Charles P. Roossien, Wyoming, MI (US);
David S. Teppo, East Grand Rapids, MI (US);
Steelcase Development Corporation, Caledonia, MI (US);
Abstract
A back construction includes an inverted U-shaped back frame and a back shell supported on the back frame and having stiff thoracic and pelvic regions connected by a flexible lumbar region in a manner adapted to ergonomically support a seated user. The lumber section includes a plurality of vertically spaced slots to increase its flexibility. The back shell has a complex curved shape that is forwardly concave in horizontal cross section and forwardly convex in vertical cross section. A force-generating mechanism biases the lumber section forwardly for lumbar support to a seated user.