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:
Aug. 26, 1997
Filed:
Dec. 08, 1995
Romeo Tedesco, Ontario, CA;
Global Upholstery Company Inc., Downsview, CA;
Abstract
A lumbar support includes a pocket within the chair back and a lumbar cushion, of a particular cross-sectional shape is completely disposed within that pocket and sited approximately complementary to a person's lumbar region. The lumbar cushion includes a unitary, open-cell, elastically-resilient cushion of foam, the cushion of foam being fixed within a flexible, air-impermeable envelope. The foam has an air inlet/outlet conduit directly leading thereinto, and an opening extending through the flexible, air-impermeable envelope. A valve structure in the inlet/outlet tube is provided for controlling gas pressure within the cushion of foam for adjusting the firmness of the lumbar support means in the chair in a position accessible to a chair occupant. The valve structure includes a guide tube secured to the opening in the air inlet/outlet conduit. An air-impermeable plug, is manually-slidable within the guide tube between an open position, allowing flow of air, and a resiliently-biased closed position stopping flow of air. A manually-actuatable member is disposed within the tubular member and is secured to the air-impermeable plug for moving the air-impermeable plug between the two positions. An outer flange forming part of the guide tube is secured by its side face to a side of the chair back.