Patent ID: 8746665

Claim:
A drive apparatus for linear movement of a processing tool with regard to a work piece, having a tool holder fixed in place on a carriage, for attaching the processing tool, having a guide device that is fixed in place, in which device the carriage is guided vertically in linearly displaceable manner, and having a drive device that has a first force transfer device that stands in engagement with a second force transfer device connected with the carriage, in an engagement position for movement of the carriage, wherein the drive device is mounted in the guide device so that the drive device is movable between a release position, in which the first and second force transfer devices are not in engagement with one another, and the engagement position, in such a way that the gravitational force of the drive device brings about a movement from the release position into the engagement position, and wherein the drive device is attached to the guide device so as to pivot, in limited manner, about a pivot axis that is fixed in place.