Fail-safe actuator and hydraulic system incorporating the same

Details Fail-safe actuator and hydraulic system incorporating the same Fail-safe actuator and hydraulic system incorporating the same

F - Mech Eng,Light,Heat,Weapons

15

B

138/62, 138/93

F15B 15/14 (2006.01) F15B 20/00 (2006.01) F16K 31/143 (2006.01)

Patent

CA 1140837

730-879 Fail-Safe Actuator and Hydraulic System Incorporating the Same Abstract The present invention is directed to an improved fail-safe actuator and hydraulic system incorporating the same, The actuator includes energy storage means in the form of a spring adapted to set a control device in a predetermined condition, illustratively in the closed condition, responsive to a failure situation, illustratively, a power failure. The actuator includes a coupling which permits normal operation of the control device without cycling the spring energy storage means, thus increasing the life of the spring and eliminating energy wastage inherent in cocking the spring during each operative cycle.

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