Patent ID: 8573080

Claim:
An actuator comprising: a body in which a rod is mounted to slide, the actuator including a screw extending inside the rod to co-operate with a nut secured to the rod, the screw being driven in rotation by a motor; the rod being associated with a piston that slides in a cavity of the body so as to define two chambers therein, the chambers being filled with hydraulic fluid and being put into communication via fluid transfer means fitted with at least one regulator means adapted to throttle the fluid expelled from one of the chambers, in at least one travel direction of the rod, the actuator including a drive shaft extending axially inside the screw for driving the screw in rotation, leaving the screw free to move in translation relative to the drive shaft, and the motor being arranged to drive the drive shaft in rotation, wherein the screw is guided in rotation by a guide bearing that is mounted slidably in the cavity of the body, the actuator including selective retaining means for retaining the guide bearing in position inside the cavity.