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:
Jun. 21, 2011
Filed:
Feb. 10, 2009
Phichet Numnual, Pathumthani, TH;
Takashi Nakano, Chiba, JP;
Makoto Mikami, Chiba, JP;
Seiko Precision Inc., Narashino-shi, JP;
Abstract
A light quantity control device includes: a bottom board having an opening; a first blade and second blade linearly moving in opposing directions and changing in an opening area of the opening; a supporting blade overlapping the first blade and closing the opening in cooperation with the first blade and second blade; and a driving lever connected to the first blade, the second blade, and supporting blade, and driving the first blade, second blade, and the supporting blade by rotation of the driving lever. The first blade and supporting blade are engaged with an identical pin provided in the driving lever. The first blade and supporting blade are misaligned in such a way to reduce an overlapping degree of the first blade and supporting blade. The first blade and supporting blade bring the opening to the fully closed state in cooperation with the second blade.