Electric actuator
AssigneeCooper Cameron Corporation
InventorKlaus Biester
Life of this patent
Estimating the term…
Abstract
An actuator for actuating a control mechanism by axially moving an actuating member against a force comprises a housing in which a reversible drive is arranged with a first rotatable part and a second rotatable part engagable with one another and acting on the actuating member for axially moving it in feed direction to the control mechanism upon rotation in one direction. An electric motor rotates the first rotatable part and the second rotatable part by engagement with the first rotatable part. A rotation prevention member prevents rotation of at least one of the rotatable parts in a second direction. A release releases the rotation prevention member to permit rotation of at least one of the rotatable parts to permit the actuating member to be axially moved in a direction opposite to the feed direction.
Claims48
An actuator for actuating a control mechanism applying a force against the actuator comprising:
- an actuating member adapted to be axially movable against the force;
- a housing having an enclosure in which a reversible drive is arranged with a first rotatable part and a second rotatable part engagable with one another and acting on said actuating member axially moving said actuating member in a feed direction relative to the control mechanism upon rotation in a first rotatable direction;
- a motor rotating said first rotatable part and said second rotatable part by engagement with said first rotatable part;
- a first rotation prevention member preventing a rotation of at least one of said rotatable parts in a second rotatable direction,
- a release releasing said first rotation prevention member to permit rotation of said at least one rotatable part to permit said actuating member to be axially moved in a direction opposite to said feed direction, and
- said first rotation prevention member being arranged between said second rotatable part and said housing to rotationally fix said second rotatable part to said housing to prevent rotation in said second rotatable direction.
An actuator comprising:
- a housing;
- an actuating member;
- first and second rotatable parts disposed within said housing and engagable with one another, said rotatable parts adapted to move the actuating member axially upon rotation in one direction;
- a rotating member engaging said first rotatable part and rotating said first and second rotatable parts;
- a prevention member arranged between said second rotatable part and said housing to rotationally fix said second rotatable part to said housing and prevent rotation of at least one of said rotatable parts in a second direction;
- and
- a release releasing said prevention member to permit rotation of said at least one rotatable part to permit said actuating member to move axially in a direction opposite to said one direction.
An assembly for actuating a control mechanism providing a force comprising:
- first and second rotatable members rotatably engaging such that said second rotatable member moves axially upon one of said rotatable members being rotated with respect to the other of said rotatable members;
- a release member having a first position preventing said second rotatable member from rotating in a first rotating direction and a second position allowing said rotatable member to rotate in an opposite second rotating direction;
- an actuator member reciprocably movable and engaging said second rotatable member;
- a motor rotating said first rotatable member in said first rotating direction when said release member is in said first position causing said second rotatable member to move axially in a first axial direction, said first rotatable member being prevented from rotating in said second rotating direction;
- and
- the actuator member adapted to be axially moveable in a second axial direction against the force of the control mechanism and causing said second rotatable member to rotate in said second rotating direction and move axially in said second axial direction when said release member is in said second position.
An assembly for actuating a control mechanism providing a force comprising:
- a screw threadingly engaging a nut such that said screw moves axially upon one of said screw and nut being rotated with respect to the other of said screw and nut;
- a tang having a first position preventing said screw from rotating in a first rotating direction and a second position allowing said screw to rotate in an opposite second rotating direction;
- an actuator shaft reciprocably movable and engaging said screw;
- a motor rotating said nut in said first rotating direction when said tang is in said first position causing said screw to move axially in a first axial direction, said nut being prevented from rotating in said second rotating direction;
- and
- the actuator shaft adapted to be axially moveable in a second axial direction against the force of the control mechanism and causing said screw to rotate in said second rotating direction and move axially in said second axial direction when said tang is in said second position.
Dependencies are inferred from the claim text.