Patent ID: 9447883
Filing Date: 2016-09-20
CPC Classification: B63H,F16J

Claim Text:
1. A seal apparatus for sealing a shaft relative to liquid media, comprising a housing, a seal ring and a spring, wherein the seal ring comprises a clamp-in element clampingly held in allocated housing-fixed support rings of the housing, an adjoining intermediate part forming a seal membrane, and an angled element facing toward the shaft with formation of a seal lip for contact on the shaft, whereby a receiving groove that receives the spring therein is arranged in the angled element above the seal lip, wherein the receiving groove is embodied as a spring pocket bounded between two side walls of the spring pocket, with a pocket height in a radial direction essentially equal to a spring diameter of the spring, with a first one of the side walls of the spring pocket having an undercut so that the spring can be retained radially inwardly under the undercut, and with a free space for the spring formed in the spring pocket in a pressureless condition of the seal apparatus, wherein the free space is formed between a widest part of the spring and an adjacent one of the side walls in an axis-parallel direction parallel to an axis of the shaft, wherein the seal membrane and the angled element are integral portions of a monolithic seal component integrally including the two side walls that bound the spring pocket therebetween in the axis-parallel direction, wherein the seal membrane is flexible and is configured and arranged so that the seal membrane is pivotable forward and backward along the axis-parallel direction, and the seal membrane and the angled element are spaced forwardly away from and do not contact the housing in the pressureless condition, and wherein the seal membrane is configured and arranged so that its tilt angle increases from the pressureless condition upon pressure loading up to reaching a limit pressure at which the membrane contacts on an allocated housing wall of an extended support ring of the housing, and upon the pressure loading an enlarged bottom side contact angle is established in the angled region with the seal lip.