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. 04, 2008
Filed:
Oct. 08, 2004
James Richard O'reagan, Greer, SC (US);
James Richard O'Reagan, Greer, SC (US);
Span-America Medical Systems, Inc., Greenville, SC (US);
Abstract
A foam chair cushion having transverse support ribs is provided for reduction of shear stress between a person's skin and the surface of the chair cushion. The chair cushion may include transverse, lateral support ribs upon the support surface of the cushion. The support ribs have a predetermined cross-sectional geometry that is curvilinear, with a superior aspect generally disposed for receipt of a person and a inferior aspect opposite. The inferior aspect of the cross-section of the support ribs may undercut the portion of the support ribs vertically above it. Having such cross-sectional geometry, the support ribs are directionally oriented, either toward the one end or the other of the chair cushion. The chair cushion may include support ribs that are directionally oriented toward the foot of the chair in regions adapted for the person's upper torso, buttocks, and lower legs, and directionally oriented toward the head of the chair in a region adapted for the person's thighs. The chair cushion may also include longitudinal cuts in the support surface, perpendicular to the transverse support ribs, thereby defining independent support cells upon the support surface.