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US 12,140,247 B2Granted
Electrical actuator
AssigneeOneSubsea IP UK Limited
InventorsParth Dilip Pathak, Federico Davila, Augusto Arcelaschi
Life of this patent
Estimating the term…
Abstract
A system includes an electric actuator having an actuation stem, a screw assembly, an electric drive, and a lock. The screw assembly is coupled to the actuation stem, wherein the screw assembly includes a male screw portion coupled to a female screw portion. The electric drive is coupled to the screw assembly, wherein the electric drive is configured to move the screw assembly to move the actuation stem. The lock is configured to hold a position of the actuation stem when not driving movement of the actuation stem.
Claims20
A system comprising:
- an electric actuator, comprising:
- an actuation stem;
- a screw assembly coupled to the actuation stem, wherein the screw assembly comprises a male screw portion coupled to a female screw portion;
- an electric drive coupled to the screw assembly, wherein the electric drive is configured to move the screw assembly to move the actuation stem;
- a lock configured to hold a position of the actuation stem when not driving movement of the actuation stem;
- and
- an override coupled to the screw assembly and configured to enable an override of the lock to move the screw assembly without the electric drive,
- wherein the override and the electric drive are disposed in a series arrangement,
- wherein the override and the electric drive are coupled to a first gear assembly, the first gear assembly being coupled to the screw assembly,
- wherein the first gear assembly comprises a worm gear engaged with a worm screw, and the override and the electric drive are separately coupled to the worm screw, and
- wherein an engagement between the worm gear and the worm screw of the first gear assembly functions as the lock.
8 more elements
A method comprising:
- powering an electric drive to move a screw assembly to move an actuation stem of an electric actuator, wherein the screw assembly comprises a male screw portion coupled to a female screw portion, and the screw assembly is coupled to the actuation stem;
- holding, via a lock, a position of the actuation stem when not driving movement of the actuation stem;
- and
- overriding the lock, via an override, and moving the screw assembly to move the actuation stem without the electric drive,
- wherein the override and the electric drive are disposed in a series arrangement,
- wherein the override and the electric drive are coupled to a first gear assembly, the first gear assembly being coupled to the screw assembly,
- wherein the first gear assembly comprises a worm gear engaged with a worm screw, and the override and the electric drive are separately coupled to the worm screw, and
- wherein an engagement between the worm gear and the worm screw of the first gear assembly functions as the lock.
5 more elements
A system comprising:
- a valve assembly having a valve disposed in a valve body;
- and
- an electric actuator, comprising:
- an actuation stem coupled to the valve;
- a screw assembly coupled to the actuation stem, wherein the screw assembly comprises a male screw portion coupled to a female screw portion;
- an electric drive coupled to the screw assembly, wherein the electric drive is configured to move the screw assembly to move the actuation stem;
- a lock configured to hold a position of the actuation stem when not driving movement of the actuation stem;
- and
- an override coupled to the screw assembly, wherein the override is configured to enable an override of the lock to move the screw assembly without the electric drive, and the override comprises a remotely operated vehicle (ROV) override,
- wherein the override and the electric drive are disposed in a series arrangement,
- wherein the override and the electric drive are coupled to a first gear assembly, the first gear assembly being coupled to the screw assembly,
- wherein the first gear assembly comprises a worm gear engaged with a worm screw, and the override and the electric drive are separately coupled to the worm screw, and
- wherein an engagement between the worm gear and the worm screw of the first gear assembly functions as the lock.
10 more elements
Dependencies are inferred from the claim text.