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US 8,508,168 B2Granted
Linear actuator
AssigneeAktiebolaget Skf
InventorJohannes Andrianus Maria Duits
Life of this patent
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Abstract
Linear actuator device, comprising a housing (102,202), a piston rod (109,209), an electrical motor (116,216) and a transmission means (105,106,305,307) adapted to transfer the rotation of the electrical motor to a linear movement of the piston rod, where the linear actuator device comprises an integrated electrical interface having two signal inputs adapted to extend and retract the piston rod and two signal outputs adapted to indicate a retracted end position (122) and an extended end position (121) of the piston rod.
Claims10
A linear actuator comprising:
- a housing,
- a piston rod,
- an electrical motor,
- a transmission configured to convert rotation of the electrical motor to linear movement of the piston rod, and
- an integrated electrical interface coupled with the motor and having an input adapted to extend the piston rod, an input adapted to retract the piston rod, an output adapted to indicate a retracted end position of the piston rod, and an output adapted to indicate an extended end position of the piston rod, wherein
- the linear actuator includes a motor having a rotor fixedly attached to the internally threaded nut, and a stator fixedly attached to the housing, the stator and the rotor being positioned around the extended internally threaded nut.
3 more elements
Dependencies are inferred from the claim text.