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:
Jun. 21, 2005
Filed:
Jan. 31, 2001
Hiroshi Nomura, Saitama, JP;
Nobuaki Aoki, Tokyo, JP;
Yoshihiro Yamazaki, Saitama, JP;
Satoru Nakamura, Tokyo, JP;
Hiroshi Nomura, Saitama, JP;
Nobuaki Aoki, Tokyo, JP;
Yoshihiro Yamazaki, Saitama, JP;
Satoru Nakamura, Tokyo, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
A zoom lens includes a plurality of lens groups, and a cam barrel having a cam groove formed on an inner peripheral surface thereof. The cam barrel includes a first barrel having the cam groove on an inner peripheral surface thereof, and a second barrel which is fitted on a front part of an outer peripheral surface of the first barrel, the first barrel and second barrel being movable in the optical axis direction with a predetermined clearance provided therebetween in the optical axis direction while being rotatable together about the optical axis, so that an external force applied to the zoom lens from the outside of the zoom lens is transmitted to the first barrel via the second barrel.