Patent ID: 7559410

Claim:
An electric drive for a parking brake, comprising a rotationally driven screw nut which is in engagement with two spindles which are aligned with one another, wherein the two spindles have threads running in opposite directions to each other, are fixed in the rotational direction, can be moved translational to each other, and are each provided with a cable holder for connecting to brake elements, wherein 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, wherein the screw nut and the spindles are axially movable to each other, wherein the rotationally driven screw nut is permanently connected to a gearwheel, and wherein a fixed drive pinion is made wider than the gearwheel so that in the state in which the gearwheel is in engagement with the drive pinion, said gearwheel can move, together with the screw nut and the spindles, axially in relation to said drive pinion.