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. 20, 2007
Filed:
Sep. 21, 2004
Applicants:
Yuichirou Usuda, Saitama, JP;
Shigemi Takahashi, Tokyo-to, JP;
Inventors:
Yuichirou Usuda, Saitama, JP;
Shigemi Takahashi, Tokyo-to, JP;
Assignee:
Nidec Copal Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 9/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drive member attached to the output shaft of a DC motor placed on a shutter base board includes a drive pin connected to the arm of a shutter blade within a blade chamber for driving the shutter blade to open and close an exposure opening with the reciprocal rotation of the DC motor. A brake member rotatably attached to the shutter base board and having a frictional force applied thereto by a spring washer brakes the rotation of the drive member when a bent portion is pushed by the drive pin to rotate.