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:
May. 03, 2011
Filed:
Apr. 15, 2009
Applicant:
Yuichi Kurosawa, Tokyo, JP;
Inventor:
Yuichi Kurosawa, Tokyo, JP;
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 9/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A diaphragm driving device for a camera including a camera body and an interchangeable lens which is detachably attached to the camera body, wherein the interchangeable lens includes a diaphragm mechanism having an in-lens spring device for performing a stop-down operation, the in-lens-spring device having a spring constant. The camera body includes a diaphragm drive mechanism having a diaphragm drive motor and an in-body spring device, both of which are for making the diaphragm mechanism of the interchangeable lens perform the stop-down operation, and