Patent ID: 8322726

Claim:
Seal for a compressor to adjoin and seal a shaft having a shaft surface, comprising: a first seal part possessing a cylindrical sealing edge adapted to adjoin and seal the shaft, the sealing edge extending along a line which deviates from a circular shape and which is closed in itself in a peripheral direction, the line along which the sealing edge extends is wavy, comprising several arcs so that relative motion between the shaft and the sealing edge lubricates the shaft surface to prevent wear of the sealing edge due to abrasion; and a second seal part with a sealing section which is adapted to adjoin the shaft and which is hollowly cylindrical when the sealing section adjoins properly with an outside surface of the shaft, the sealing section comprising a return structure for returning a fluid, the sealing section configured to extend along the outside surface of the shaft between the first seal part and the shaft when the sealing section properly adjoins the outside surface of the shaft, and the second seal part is directly joined to the first seal part chemically, wherein the second seal part comprises a radially extending first surface facing the first seal part and an opposing radially extending second surface facing in an opposite direction than the first surface, and the radially extending second surface is free of direct contact with other elements of the seal.