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. 27, 2012
Filed:
Dec. 07, 2010
Chuen-jong Tseng, Chiayi Hsien, TW;
Chuen-Jong Tseng, Chiayi Hsien, TW;
Taiwan Shin Yeh Enterprise Co., Ltd., Chiayi Hsien, TW;
Abstract
A backrest device for a chair includes two lateral pipe units, each including a backrest mounting pipe member and a coupling pipe member, and a backrest unit. The backrest mounting pipe member has a main surrounding wall defining a surrounding space therein, and a convex groove-defining wall disposed in the surrounding space and defining an engaging groove therein. The coupling pipe member has a coupling surrounding wall coupled to a lower end of the main surrounding wall, and an abutting wall for closing a top end of the coupling surrounding wall. The backrest unit includes a backrest member having opposite lateral portions each forming a rod-receiving loop, and two positioning rods sleeved respectively in the rod-receiving loops. Each lateral portion and a respective positioning rod are retained within the engaging groove of a corresponding pipe unit.