Rod locking device

Details Rod locking device Rod locking device

E - Fixed Constructions

21

B

166/50

E21B 33/06 (2006.01)

Patent

CA 1277591

Abstract of the Disclosure 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 ratchet teeth and engaging the threads on the threaded rod, a braking piston slidably mounted within said housing and having ratchet teeth engaging with the 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 rod and preventing rotation of the nut in the opposite direc- tion, and means for exerting pressure on said braking piston to disengage the ratchet teeth during retracting movement of the wedge.

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