US Patent 11802622 Shaft seal, in particular radial shaft seal

A shaft seal, in particular a radial shaft seal, has a seal element that is provided with a seal section that under elastic deformation contacts the outer side of a mounting sleeve. The shaft seal has a grease ring located on the mounting sleeve wherein the grease ring is arranged axially adjacent to the free end of the seal section on the mounting sleeve. For installation, grease ring and seal section are pushed by a mounting tool onto the shaft and the seal section on the shaft is pushed onto the grease ring in such a way that the grease of the grease ring is distributed between the seal section and the shaft.