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. 26, 2013
Filed:
Mar. 01, 2012
Bill Wang, Tainan, TW;
Bill Wang, Tainan, TW;
I-Tek Metal Mfg. Co., Ltd., Tainan, TW;
Abstract
A cylindrical lock includes a retractor () mounted between inner and outer operational devices () and operably connected to a latch (). The inner operational device () includes an inner chassis (), an inner spindle (), and an inner lining () made of a material harder than the inner spindle (). The outer operational device () includes an outer chassis (), an outer spindle (), and an outer lining () made of a material harder than the outer spindle (). Inner and outer returning devices (A,B) are provided for returning the inner and outer spindles (). A torsion spring (A,B) of each of the inner and outer returning devices (A,B) is mounted to a push ring (A,B) before assembly with the inner and outer chassis (), allowing easy assembly of the torsion springs (A,B).