High torque rotating actuator
AssigneeCooper Cameron Corporation
InventorsGerald S. Baker, David Garnham, Brian Hart, Danny K. Wolff
Life of this patent
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Abstract
A high torque rotating actuator is disclosed. The high torque rotating actuator has a variable helix angle that allows the actuator to generate greater torque near the end of its travel when it is needed to close a valve or operate a choke. The high torque rotating actuator is designed for use with valves and chokes. In a second embodiment, a high torque rotating actuator is configured to give a shorter overall assembly. As in the preferred embodiment, a variable helix angle is used to generate greater torque near the end of its travel when it is needed to close a valve or operate a choke.
Claims9
A high torque rotating actuator, comprising:
- a housing;
- a stem coaxially positioned within said housing;
- a drive bushing engaging said stem;
- an intermediate head axially adjacent said drive bushing, said intermediate head including a plurality of longitudinal grooves and said stem extends through said intermediate head;
- an annular piston positioned between said drive bushing and said housing, said annular piston reciprocable within said housing by an urging means;
- said drive bushing including a plurality of helical grooves, said helical grooves having a variable helix angle;
- and,
- said annular piston having first and second engaging means, said first engaging means engaging said helical grooves of said drive bushing and said second engaging means engaging said longitudinal grooves in said intermediate head whereby reciprocation of said annular piston in said housing causes rotation of said drive bushing and said stem.
Dependencies are inferred from the claim text.