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. 18, 2014
Filed:
May. 08, 2012
Katsura Nakajima, Yamanashi-ken, JP;
Hiroaki Naganuma, Yamanashi-ken, JP;
Katsura Nakajima, Yamanashi-ken, JP;
Hiroaki Naganuma, Yamanashi-ken, JP;
Nisca Corporation, Minamikoma-gun, Yamanashi-ken, JP;
Abstract
A plurality of blade members is overlapped and disposed in the shape of scales in a ring-shaped board having an optical-axis aperture at the center, and is held from above by a driving ring so that each blade member performs open/close motion. At this point, an elastic member is disposed between the blade members and the board to press each blade member against the driving ring side, or an elastic member is disposed between the blade members and the driving ring to press the blade members against the board side, and in this state, the blade members are opened and closed.