초록 ▼

The improved blowout preventer ram tail rod locking device of the present invention includes a housing, a body movable in the housing, having a threaded rod and coacting with the outer end of the ram tail rod to lock it in the ram closed position, a nut rotatably mounted within said housing, having

The improved blowout preventer ram tail rod locking device of the present invention includes a housing, a body movable in the housing, having a threaded rod and coacting with the outer end of the ram tail rod to lock it in the ram closed position, a nut rotatably mounted within said housing, having ractchet teeth and engaging the threads onthe threaded rod, a braking piston slidably mounted within said housing and having ratchet teeth engaging withthe ratchet teeth of the nut, the ratchet teeth on said nut and piston allowing freedom of rotation of the nut during movement of the body into engagement with the ram tail road and preventing rotation of the nut in the opposite direction, and menas for exerting pressure on said braking piston to disengage the racthet teeth during retracting movement of the wedge.

대표청구항 ▼

A ram locking apparatus for locking a ram in a blowout preventer housing by engagement of the outer end of a tail rod connected to the ram comprising a lock housing having two pairs of hollow aligned legs with one leg being mounted so that its hollow interior is positioned to receive the ram tail ro

A ram locking apparatus for locking a ram in a blowout preventer housing by engagement of the outer end of a tail rod connected to the ram comprising a lock housing having two pairs of hollow aligned legs with one leg being mounted so that its hollow interior is positioned to receive the ram tail rod therein and the second pair connect to said one leg at an angle and with their interiors in communication with all legs, a body positioned within one of said second pair of legs of said lock housing and slidable therein responsive to pressure and having a surface for engagement with the end of the ram tail rod, means for supplying pressure for moving said body in said second pair of legs of said lock housing between a locked position engaging the end of the ram tail rod and a retracted position disengaged from the end of the ram tail rod, a threaded rod extending from the end of said body opposite from the tail rod engaging surface of said body, a nut threaded on said threaded rod and mounted in said housing leg containing said body for rotation therein and having means for restraining said nut against axial movement in said housing leg, a sleeve surrounding and spaced radially outward from said threaded rod, a braking piston surrounding said sleeve and having ratchet means engaging said nut to prevent rotation of said nut in the direction of retraction of said ram from closed position, and means for delivering pressure to said braking piston to slide it axially out of engagement with said nut to release said nut and allow retraction of said ram from closed position.