Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Graham Hall0
Robert Large0
James Duncan Trinder0
Date of Patent
February 21, 2017
0Patent Application Number
145195500
Date Filed
October 21, 2014
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A system to control fluid flow through a fluid passage includes a valve that is fail-safe closed to selectively control fluid flow through the fluid passage, and a hydraulic actuator operatively coupled to the valve to open the valve when hydraulic pressure above a predetermined amount is received. The system further includes an inlet to provide hydraulic pressure to the hydraulic actuator and open the valve and an outlet to vent hydraulic pressure from the hydraulic actuator and close the valve.
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