Patent ID: 9291176
Filing Date: 2016-03-22
CPC Classification: F15B

Claim Text:
1. A locking hydraulic actuator for locking an actuator piston in an extended position, the locking hydraulic actuator comprising: an actuator cylinder housing for receiving the actuator piston therein, the actuator cylinder housing defining an upper interior actuator chamber for receiving hydraulic fluid to exert an extension force on the actuator piston, the actuator cylinder housing defining a lower interior actuator chamber for receiving hydraulic fluid to exert a retraction force on the actuator piston; a lock mechanism housing defining an interior cavity extending into the lower interior actuator chamber of the actuator housing; and a locking pin in sealed engagement within the interior cavity of the lock mechanism housing, the locking pin mechanically biased towards a locking position wherein the locking pin extends into the lower interior actuator chamber to lockingly engage the actuator piston, the lower interior actuator chamber configured to receive hydraulic fluid when the locking pin is lockingly engaged with the actuator piston.