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:
Feb. 01, 2011
Filed:
Apr. 07, 2009
Takahiro Kaneta, Hino, JP;
Tatsuo Takanashi, Hachioji, JP;
Takahiro Kaneta, Hino, JP;
Tatsuo Takanashi, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A lens barrel includes a first member which has a first sliding-contact surface and an opening formed in the first sliding-contact surface; a second member which has a second sliding-contact surface and moves relative to the first member, the second sliding-contact surface being placed in sliding contact with the first sliding-contact surface; a photodetector provided in the opening of the first member, facing the second sliding-contact surface, to detect relative movement between the first member and the second member; and a lubricant sump portion which, being provided in the first member, has a lubricant sump space on opposite sides of the opening interposing the opening therebetween in a direction of the relative movement.