Patent ID: 8070352

Claim:
A vibration exciter, comprising: at least two axles disposed parallel to one another; at least two imbalance masses, which are attached to one or more of the axles, means for adjusting a relative rotary position of the imbalance masses relative to one another, said means comprising at least one rotary oscillating motor having a rotor shaft and a stator housing, wherein the rotor shaft is an integral part of one of the axles, and a rotary position of the stator housing relative to the rotor shaft can be changed; at least one closure lid on the stator housing that is at least partially unreleasably coated with a slide alloy, for radial and axial bearing of the rotor shaft; and at least one shaft seal disposed between the rotor shaft and stator housing, said seal being hydraulically biased and provided with a support element.