Patent ID: 7015410

Claim:
A drive device for an interrupter having a fixed and a movable contact part, wherein the movable contact part is controlled by a switching rod, the drive device comprising: a drive to drive the movable contact part, wherein the drive is mounted such that it rotates around a stationary pivot, drive levers, each having a triangular contour, which are fitted in each corner region with a respective pivot bearing and each have a central pivot bearing for accommodating a contact spring which is mounted such that it can pivot, the central pivot bearing being arranged between an upper pivot bearing which is connected to the switching rod and a lower pivot bearing which is connected to the drive, wherein the contact spring comprises a first end and a second end, and is mounted at the first end in a stationary collar guide, and configured such that a contact pressure force for the drive may be regulated by altering an active path length of the contact spring, and configured to adjust the active path length of the contact spring in a stepless manner by a regulating screw which is accessible from the outside of the drive device, the drive is controlled by the switching rod such that the switching rod is not substantially subjected to a force of the contact spring when the drive is in either a connected state or a disconnected state, and the force of the contact spring acts substantially on the drive when the drive is in the connected state.