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:
Mar. 13, 2012
Filed:
Jul. 26, 2010
Applicant:
Yuichiro Kato, Utsunomiya, JP;
Inventor:
Yuichiro Kato, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens apparatus of the present invention includes a cam ringhaving an inner circumferential surface on which first, second, and third cam groove portions, andwith which first, second, and third cam followers, andprovided on first, second, and third lens holding members, andengage. The cam ring introduces the first and second cam followers from an insertion openingand includes an introducing groove portionfor introducing the third cam follower and a connecting groove portion. The third cam groove portion is divided at a middle of the introducing groove portion which connects the insertion opening with the second cam groove portion.