Patent ID: 7249919

Claim:
A release device for actuating a clamping device for tools, the release device comprising: a housing; at least one release element arranged in the housing; an electric motor drivingly connected to the at least one release element for moving the at least one release element from a rest position into a release position in which a draw bar of the clamping device is moved against a clamping force into a disengaged position; at least one coupling element provided on the housing and a counter coupling element connected to a tool spindle; wherein the at least one coupling element and the counter coupling element have a common axis and are axially spaced from one another in the rest position of the at least one release element; a pressure member fixedly connected to the draw bar and protecting through the counter coupling element and facing the at least one release element, wherein the at least one release element, when moved into the release position, acts on the pressure member to move the at least one coupling element into a contact position with the counter coupling element in which contact position the at least one release element causes the draw bar to move into the disengaged position.