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:
Sep. 06, 2011
Filed:
Sep. 10, 2009
Masanori Sakai, Yokohama, JP;
Masanori Sakai, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A focal-plane shutterincludes a leading blade driving memberrotatably fitted onto a first shaftand driven by a biasing force of a leading blade driving spring, a trailing blade driving memberrotatably fitted onto a second shaftand driven by a biasing force of a trailing blade driving spring, a leading blade adjusting memberrotatably fitted onto the first shaftand adjusting the biasing force of the leading blade driving spring, a trailing blade adjusting memberrotatably fitted onto the second shaftand adjusting the biasing force of the trailing blade driving spring, and an upper base plateincluding a first surfaceand a second surfacethat are thrust position limiters. An area of the first surfaceis larger than that of the second surface