Jack screw for operating a vehicle door

摘要

The jack (4) has an endless screw and nut assembly defining an axis (22), where the assembly is formed of an endless screw (14) and a nut. The endless screw is rotatably mounted in a bearing (20). A tensioner (60) is force-fitted onto the endless screw or onto the bearing, and biases the bearing by mutual axial bearing when the jack is inoperative. The tensioner comprises tongues (62) having edges gripped with the endless screw or the bearing.