Seat adjuster

A seat adjuster, comprising:

• a brake which acts between a fixed part and an adjustable part and by which the adjustable part is adapted to be blocked in different positions on the fixed part and is adapted to be released by a release element thereof,
• an adjustment element which acts on the release element, for selectively adjusting the adjustable part in two opposite directions, and
• a locking element which automatically engages and interlockingly locks the adjustable part to the fixed part when the adjustment element is not actuated and automatically disengages when the adjustment element is actuated,
• wherein the disengagement of the locking element and the adjustment of the adjustable part is adapted to be effected by moving the adjustment element out of a neutral position in one of the two directions,
• wherein the locking element has a toothed segment for meshing with a toothed ring coupled to the adjustable part and is guided on the fixed part in such a way that the locking element is adapted to be moved in a radial direction of the toothed ring between a locking position, in which the locking element meshes with the toothed ring, and a release position, in which the locking element is moved away from the toothed ring,
• wherein the brake is a clamp roll freewheel brake and the release element thereof forms the toothed ring and is in engagement with the adjustable part such that a relative rotation of the release element and the adjustable part is possible only within a limited play,
• wherein the adjustment element is provided with a radially movable slide which has another toothed segment for engagement with the toothed ring, and
• wherein the adjustment element and the slide are in engagement with one another via complementary cams and notches such that a torque that is transferred from the adjustment element onto the slide causes a radial movement of the slide for establishing the engagement with the toothed ring.