Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
James M. Anderton Askew0
Date of Patent
April 19, 2011
0Patent Application Number
121468580
Date Filed
June 26, 2008
0Patent Primary Examiner
Patent abstract
A controller moves a solenoid operated valve with a first solenoid operating pulse during a travel time. After a time interval, the controller applies a second pulse, which moves the valve towards its original position. The time interval may be varied, and a characteristic indicative of the return of the valve to the original position may be detected based on a comparison of the pulses.
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