Patent ID: 6585227
Filing Date: 2003-07-01
Classification: F15B,F16K,Y10T

Abstract:
A roller screw actuator for a subsea choke or module, said actuator comprising:an actuator housing; a driven member, said driven member centrally disposed in said actuator housing and supported therein by support assemblies; said driven member includes a central driven shaft; and, a pressure responsive driving member coupled to said driven member, whereby axial movement of said pressure responsive driving member imparts rotational movement to said driven member said pressure responsive driving member includes an axially reciprocable piston formed thereon; said pressure responsive driving member includes a plurality of spindle shafts disposed circumferentially around said central driven shaft; said plurality of spindle shafts are helically threaded and in threaded engagement with a complementary helical thread on said central driven shaft; and, an anti-rotation means disposed between said pressure responsive driving member and said actuator housing to prevent rotation of said pressure responsive driving member as it is reciprocated.