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. 13, 2007
Filed:
Feb. 02, 2006
Hiroshi Takeuchi, Osaka, JP;
Hiroto Ogata, Osaka, JP;
Hiroshi Takeuchi, Osaka, JP;
Hiroto Ogata, Osaka, JP;
Itoki Corporation, Osaka, JP;
Abstract
A chair is provided with a basefixed at an upper end of a leg pillar, a back support unitattached to the baseso as to tilt backward, a backrestattached to the back support unit, and a spring unitsupporting the backward tilt of the back support unit. The spring unitis to expand and contract in a back and forth direction when viewed from above and arranged further behind than a tilt supporting point 16of the back support unit. The back support unit, the spring unit, and the baseconstitute a kind of link mechanism and the spring unitwill expand and contract mainly at the front end, while tilting backward.