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. 23, 1999
Filed:
Aug. 18, 1997
Applicant:
Inventor:
Yuji Ihara, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
359700 ; 359823 ;
Abstract
A lens barrel having a cam cylinder formed with a cam groove having two side surfaces and a lens holding frame provided with a cam follower inserted into the cam groove and guided in contact with one of the two side surfaces. The cam follower includes an elastic member in elastic contact with the other side surface of the cam groove to absorb a play between the cam groove and the cam follower. A distance between the two side surfaces of the cam groove becomes smaller in a direction of depth of the cam groove; and there is a clearance between the cam follower and the other side surface.