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. 20, 2013
Filed:
Nov. 22, 2011
Applicant:
Yoshiyuki Matsumoto, Yokohama, JP;
Inventor:
Yoshiyuki Matsumoto, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 9/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A blade lever is provided with a roller bearing portion, which extends towards a shaft around which a roller is rotatably supported to prevent falling off of the roller. The roller bearing portion is provided within a range of movement of the shaft when the blade lever is driven in a direction of opening an aperture by a first blade and a second blade with an urging force of a blade return spring.