Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tadashi Uchino0
Yoshihiro Fukano0
Date of Patent
November 4, 2008
0Patent Application Number
111672550
Date Filed
June 28, 2005
0Patent Primary Examiner
Patent abstract
A suck back valve comprises an ON/OFF valve, a suck back mechanism which includes a second piston connected to a second diaphragm to make displacement integrally and a second spring member fastened to the second piston, a load sensor which detects a load applied by a resilient force of the second spring member corresponding to a pressure of a pilot pressure to be supplied, and a second control unit which detects loads before and after displacement of the second diaphragm by using the load sensor to calculate a displacement amount of the second diaphragm based on a difference between the detected loads.
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