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:
Sep. 24, 2002
Filed:
Jul. 13, 2001
Applicant:
Inventor:
Hiroshi Tanioka, Kashiwa, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 5/00 ; G03B 1/332 ; G02B 7/02 ; G02B 1/514 ;
U.S. Cl.
CPC ...
G03B 5/00 ; G03B 1/332 ; G02B 7/02 ; G02B 1/514 ;
Abstract
A lens barrel is provided with a front lens group facing a subject, that moves only during zooming, and an internal focusing lens group, different from the front lens group, moving at least during focusing. A first cam ring having a cam groove for causing the front lens group to move, and a second cam ring that is separate from the first cam ring, is driven by the same drive source as the first cam ring, rotates together with the first cam ring, and has a cam groove for causing lens groups other than the front lens group to move, are also provided.