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:
Aug. 21, 2007
Filed:
Feb. 22, 2006
Kazuhiro Fukasawa, Yamanashi-ken, JP;
Kazuhiro Fukasawa, Yamanashi-ken, JP;
Nisca Corporation, Minamikoma-gun, Yamanashi-ken, JP;
Abstract
A light amount-adjusting device has a base plate with an optical path aperture, first and second blade members, and a driving unit for swinging open and close the blade members. Each blade member has a base-end portion and a front-end portion. The base-end portion is pivotally held on the base plate. The front-end portion faces the aperture. First and second boss-like protrusions project from the base plate and from the surfaces of the blade members. The protrusions are coupled to define the heightwise positions of the blade members in the direction of the optical axis. The vertically overlapping blade members pivotally supported on the base plate can be swung open and closed without interfering with each other. The device produces less frictional load when the aperture is opened and closed, and thus less noise.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile