Patent ID: 6513810
Filing Date: 2003-02-04
Classification: F16J,Y10S

Abstract:
A sealing ring that seals a space from a shaft, comprising:a support ring made of an impact-resistant material and having a radial portion; a lip ring made of polytetrafluoroethylene, the lip ring comprising a holding segment made of a first polytetrafluoroethylene compound selected for use in the holding segment, and a sealing segment made of a second polytetrafluoroethylene compound different from the first and selected for use in the sealing segment, the sealing segment bent toward the space to be sealed and does not include an opposite portion bent. away from the space to be sealed, the holding segment and the sealing segment being formed in one piece; the holding segment being connected with the support ring by an intermediate layer made of a polymer material having a Shore A hardness of 65 to 85, and, bonded to the support ring and radial portion thereof, a static seal having an elongated protuberance contiguous with and made of the same material as the static seal or the intermediate layer, extending radially from the static seal in the direction of the shaft to be sealed and constituting a preliminary seal against the shaft to be sealed.