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:
Nov. 27, 2001
Filed:
Mar. 27, 2000
Shigeru Yoshida, Saitama, JP;
Fuji Photo Optical Co., Ltd., Saitama, JP;
Abstract
A lens barrel having inner and outer cam rings which are configured to rotate relatively each other so as to shift one or more lens element of a lens system installed therein is equipped with an axial movement restraint mechanism for restraining axial play of one of the two cylindrical barrels relative to the other of the two cylindrical barrels while allowing relative rotation between them, the axial movement restraint mechanism comprising a radial jaw or a radial flange formed integrally with one of the inner and outer cam rings and a peripheral groove formed on another cam ring for receiving the jaw or the flanges and, if necessary, a spring disposed between the inner and outer cam rings for forcing the inner and outer cam rings in opposite axial directions, respectively.