초록 ▼

There is disclosed an improved device for locking reciprocating piston type fluid actuators in a desired position. The device includes a body, a piston having a lost motion connection to the body, a locking piston being movable with respect to the piston, an actuating cone supported on the piston, s

There is disclosed an improved device for locking reciprocating piston type fluid actuators in a desired position. The device includes a body, a piston having a lost motion connection to the body, a locking piston being movable with respect to the piston, an actuating cone supported on the piston, split locking cone elements surrounding the actuating cone and having a connection to the body, a split locking ring interconnected to the lock piston and surrounding the split locking cone elements, a housing containing the elements, a movable rod extending into the housing for engagement by said body, and means to supply fluid under pressure to the locking assembly, the application of pressure initially moving the locking assembly and when the rod is in its desired position for locking and further movement provides wedging locking of the structure in its housing bore and locks said rod in position.

대표청구항 ▼

A ram locking apparatus used on a blowout preventer having a housing, a ram, ram actuating means having a closing side and a retracted side and a tail rod having its inner end connected to the ram actuating means and its outer end engaged by said apparatus to lock said ram, said apparatus comprising

A ram locking apparatus used on a blowout preventer having a housing, a ram, ram actuating means having a closing side and a retracted side and a tail rod having its inner end connected to the ram actuating means and its outer end engaged by said apparatus to lock said ram, said apparatus comprising a lock housing having a closed end and a hollow interior connected to the exterior of the preventer housing in which the tail rod is positioned, a body positioned within said lock housing, a primary piston, a lost motion connection between said primary piston and said body, a lock piston associated with said primary piston and movable axially with respect to said primary piston, a tapered split locking ring interconnected to said lock piston, wedging means within said split locking ring, and means for supplying fluid under pressure into said lock housing for movement of said pistons, the initial pressure on said primary piston causing movement of said body to engage the ram tail rod and subsequently moving said lock piston relative to said wedging means and to thereby wedge said split locking ring against the interior of said lock housing to lock said body therein against movement in said lock housing.