Abstract: An adjustment device for producing a two-sided rotational movement for window lifters and seat adjusters in motor vehicles, containing a drive element; an angle-shifting element with a hollow cylindrical bearing surface, driven by actuation of the drive element; a driven element; a coupling arranged in the power flux between the drive element and the driven element, transmitting an adjustment movement of the drive element exclusively to the driven element when the drive element is moved from a neutral initial position in one direction or another, in addition to a brake lock arranged between the driven element and the output element, blocking torque introduced on the output side; in addition to a reset device which returns the drive element to a neutral initial position. The coupling is provided with a reinforcing lever, which is actively connected to the drive element.

Abstract: The invention relates to a bidirectional drive for rotating in the one or the other direction of drive a drive wheel which is linked with an adjusting device. The bidirectional drive includes a drive lever which can be rotated about a drive axis, starting from an initial position, in the one or the other direction. The lever is linked with a coupling element for expanding a spring element that is at least partially supported by the cylindrical drive surface of the drive wheel and that entrains the drive wheel in the peripheral direction when the drive lever is moved away from the initial position, while the spring element is no longer supported by the cylindrical drive surface of the drive wheel and the drive wheel is not entrained when the drive lever is returned to the initial position. The coupling element includes expansion cams that can be tilted about an axis spaced apart from the drive axis.

Abstract: An adjustment device for producing a two-sided rotational movement for window lifters and seat adjusters in motor vehicles, containing a drive element; an angle-shifting element with a hollow cylindrical bearing surface, driven by actuation of the drive element; a driven element; a coupling arranged in the power flux between the drive element and the driven element, transmitting an adjustment movement of the drive element exclusively to the driven element when the drive element is moved from a neutral initial position in one direction or another, in addition to a brake lock arranged between the driven element and the output element, blocking torque introduced on the output side; in addition to a reset device which returns the drive element to a neutral initial position. The coupling is provided with a reinforcing lever, which is actively connected to the drive element.