Patent ID: 8220348

Claim:
A travel compensation actuator for a clutch of a motor vehicle, comprising: a casing; a driving mechanism ( 16 ); a motor ( 12 ) mounted to the casing for driving the driving mechanism along an outward and a return path; and travel compensating means ( 14 ) for compensating travel of the driving mechanism and connecting the motor ( 12 ) to the driving mechanism ( 16 ); the travel compensating means ( 14 ) mounted to the casing ( 10 ) and displaceable inside the casing by the motor along an adjustment path (P 0 -P 2 ) and along a drive path (P 3 -P 4 ) of the driving mechanism ( 16 ); the travel compensating means comprising a slide element ( 18 ) displaceable within the casing ( 10 ) and driven by the motor ( 12 ) along the adjustment and drive paths, means ( 22 , 24 ) for adjusting the position of a drive stop of the driving mechanism and two combined means ( 34 a , 34 b ) for unidirectional travel of the drive stop; the position adjustment means carried by the slide element ( 18 ) and including a screw ( 22 ) defining the drive stop and a nut ( 24 ) screwed onto the screw ( 22 ) both mounted inside the casing ( 10 ); the two combined unidirectional travel means ( 34 a , 34 b ) are mounted inside the casing ( 10 ) to cooperate with the position adjustment means ( 22 , 24 ) in order to displace the position adjustment means ( 22 , 24 ) by one step in one direction or the other when the travel compensating means ( 14 ) are displaced by the motor in one direction or the other from an intermediary position (P 1 ) of the adjustment path; the position adjustment means ( 22 , 24 ) mounted to the slide member ( 18 ) such that the screw ( 22 ) being linearly displaceable and non-rotatable in the slide member ( 18 ); the nut ( 24 ) being rotatable on the slide member and comprising an external teeth ( 30 ) cooperating with the two combined unidirectional travel means ( 34 a , 34 b ) when the slide member ( 18 ) travels along the adjustment path.