Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Longji Bai0
Date of Patent
August 11, 2009
0Patent Application Number
121816340
Date Filed
July 29, 2008
0Patent Primary Examiner
Patent 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.
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