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. 11, 2009
Filed:
Jul. 29, 2008
Applicant:
Longji Bai, Saitama, JP;
Inventor:
Longji Bai, Saitama, JP;
Assignee:
Nidec Copal Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A base plate is provided with four guide pins and a rotor has four output pins so that each of four blades is provided with a plurality of slots. Individual slots provided to the blades are selectively fitted to the four guide pins and the four output pins so that when the rotor is reciprocated and rotated, the blades are capable of continuously changing the size of an aperture by cooperation of their aperture forming edges while maintaining a regular octagon.