Abstract: An electric drive for a parking brake is disclosed, the brake having a rotationally driven screw nut which is in engagement with two spindles which are aligned with one another, have threads running in opposite directions, and which are fixed in the rotational direction, can be moved in a translatory fashion and are each provided with a cable holder for connecting to brake elements. Here, one of the two spindles is a hollow spindle whose internal diameter is greater than the external diameter of the other spindle so that when the screw nut rotates, the spindle on one side can be retracted in a telescopic fashion into the hollow spindle on the other side.

Abstract: A cable drive (1) has a drive motor (3) for tensioning a cable (7) by a transmission (5) connecting an output shaft (4) of the drive motor (3) to the cable (7) by a drive train (8). A stop brake, especially for a motor vehicle, may have a cable drive. In order to block the cable drive (1) in a simple manner, a brake train (14) is provided parallel to the drive train (8), connecting the motor output shaft (4) to the cable (7), wherein the brake train has a self-locking device. One such cable drive can be actively connected to a brake device for the actuation of the stop brake.

Abstract: An electric drive for a parking brake is disclosed, the brake having a rotationally driven screw nut which is in engagement with two spindles which are aligned with one another, have threads running in opposite directions, and which are fixed in the rotational direction, can be moved in a translatory fashion and are each provided with a cable holder for connecting to brake elements. Here, one of the two spindles is a hollow spindle whose internal diameter is greater than the external diameter of the other spindle so that when the screw nut rotates, the spindle on one side can be retracted in a telescopic fashion into the hollow spindle on the other side.

Abstract: A drive device for a moveable part, in particular a hinged side window of a vehicle, with an actuating drive and with a threaded piece which is driven by the actuating drive and which meshes with an associated threaded piece, the associated threaded piece moving the part, there being provision, in order to reduce undesirable noises, for individual flights of at least one threaded piece (14) to be designed in such a way that they come to bear under the effective force in the respectively associated flights of the other threaded piece.

Abstract: An adjusting device serves for moving a moveable part into various positions, for example a side ventilator window of a motor vehicle. A servomotor (14) drives a spindle drive (18) which comprises essentially a spindle (24) having an external thread (26) and a sleeve part (28) which surrounds the spindle and has a corresponding internal thread (30). When acted upon by an external force, axial play in the region of the spindle drive (18) may lead to noise being produced; in order to avoid the noise, one (30) of the two threads comprises separate threaded parts (32, 36), and an elastically prestressable element (38) is provided with the aid of which an axial force can be produced between the two threaded parts (32, 36). The axial force causes the two threaded parts (32, 36) each to bear against opposite flanges of the external thread (26), so that the axial thread play is eliminated.

Abstract: A jig saw has a pivotally mounted reciprocating saw blade assembly which is reciprocated by a drive shaft. A pendular stroke device generates an additional feed movement of the saw blade. The pendular stroke device comprises a rod like element reciprocating in a direction substantially parallel to the direction of reciprocation of the saw blade, a rotatable drive element driven by the drive shaft, and a pivotally mounted engagement element against which the saw blade assembly is spring biased. The rod like element is coupled to the rotatable drive element and acts to pivot the engagement element to pivot the saw blade assembly. The pivotal axis of the engagement element is displaceable to change the spacing between the engagement element and the rod like element to determine the degree of or eliminate pivoting of the saw blade assembly. Preferably, the engagement element is pivotally mounted on an eccentric formed on a shaft which has a handle for adjustably rotating the shaft.

Abstract: The invention is directed to a power operated jig-saw which includes a housing and an elongated saw-blade holder for holding a saw-blade. A first bearing pivotally mounts the elongated saw-blade holder in the housing. A drive imparts a reciprocating up and down movement to the elongated saw-blade holder. A cam arrangement imparts a reciprocating movement to the elongated saw-blade holder and includes a body rotatably mounted in the housing and operatively connected to the drive. The rotating body has formed thereon a continuous cam surface extending about the axis of rotation thereof. The cam arrangement also includes a carrier and a resilient member. The carrier is mounted in the housing so as to be reciprocally movable in a direction transverse to the elongated saw-blade holder and carries a bearing for slideably holding the saw-blade holder.