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:
Jul. 01, 2008
Filed:
Dec. 22, 2006
Satoru Yasutomi, Hachioji, JP;
Masaaki Sunaga, Oume, JP;
Satoru Yasutomi, Hachioji, JP;
Masaaki Sunaga, Oume, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
The lens barrel includes a second group frame forwardly/backwardly movable, which is provided with plural pairs of cam followers, a first cam unit as a rotatable frame member that allows switching of engagement with the cam follower, and includes plural pairs of cam grooves and loose fit grooves, and a cam frame that allows switching of engagement with the cam follower, and includes a second cam unit formed of plural pairs of cam grooves and loose fit grooves. The cam frame rotational phase where the first cam unit switches engagement with the cam follower is different from the cam frame rotational phase where the second cam unit switches engagement with the cam follower. This makes it possible to increase a forward/backward movement of the second group frame and reduces fluctuation of resistance against the drive load, thus preventing the image blur.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile