Patent ID: 8648680

Claim:
An electromagnet having a pole tube, and having a coil that encompasses the pole tube and is mounted so as to be displaceable along a longitudinal axis of the pole tube, a first end face of the coil or of a housing thereof bearing on a first counter-bearing disposed at a first end portion of the pole tube, and an elastic element, which is supported on a second counter-bearing and biases the coil and/or the housing thereof against the first counter-bearing, the elastic element being provided between a second end face of the coil or the housing thereof and the second counter-bearing, which is disposed at a second end portion of the pole tube, wherein the elastic element is a disk spring, which is supported on a retaining ring inserted in an annular groove, and wherein the electromagnet includes a rotation lock, which has a toothing constituted between an outer circumferential surface portion of the pole tube and an inner circumferential portion of the disk spring and has a further toothing constituted between a bearing contact portion of the disk spring and the second end face of the coil or of the housing thereof.