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:
Jul. 06, 2010
Filed:
Feb. 13, 2007
Applicant:
Hung-chih LI, Taichung, TW;
Inventor:
Hung-Chih Li, Taichung, TW;
Assignee:
Genius Electronic Optical Co., Ltd., Ta-Ya Shiang, Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 17/00 (2006.01); G03B 11/00 (2006.01); G02B 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens barrel for holding a lens group therein has a body with a peripheral on which an external thread is formed. The external thread has a plurality of turns which are partially interrupted by at least one threadless segment such that the external thread has at least one of the turns completely extending around the periphery of the body. As a result of the threadless segment, the friction which is generated upon screwingly engaging the lens barrel into a coupling socket can be reduced.