Patent ID: 9500289
Filing Date: 2016-11-22
CPC Classification: E21B,F16K

Claim Text:
1. A valve actuator assembly, comprising: a translating member; an actuating member that is configured to move the translating member; and a safety device that is configured to couple the translating member with the actuating member, the safety device comprising a fluid chamber, a piston member disposed in the fluid chamber, a piston rod coupling to a first end of the piston member, and a yoke member coupling to a second end of the piston rod, the actuating member, and the translating member, wherein the piston member and the piston rod are configured to remain stationary as the actuating member moves the translating member between a first position and a second position, and wherein the safety device is configured for the yoke member to move in response to movement of the translating member to the second position and independent of the actuating member.