Patent ID: 6367811
Filing Date: 2002-04-09
Classification: F16J

Abstract:
A rotation shaft seal provided with a seal element, which contacts a rotation shaft, disposed between a housing and the rotation shaft, and a seal member of rubber having a lip end portion which contacts the rotation shaft and disposed on a fluid storing chamber side to the seal element, comprising a construction in which:the lip end portion has a predetermined inclination angle to an axis of the rotation shaft; a supporting metal, having a slope receiving face forming the predetermined inclination angle with the axis of the rotation shaft, supports a part from an inner peripheral face of the lip end portion, gradually decreasing in diameter to the fluid storing chamber side, to a back face of a standing portion of the seal member standing in a direction at right angles with the rotation shaft, through an inner peripheral face of a short cylinder portion of the seal member parallel to the rotation shaft; and a reinforcing cover metal, covering a part from a peripheral face of the lip end portion to a peripheral face of the cylinder portion, is uniformly attached to an inner brim portion disposed in a standing portion of an outer case.