Patent ID: 8955849
Filing Date: 2015-02-17
Classification: F16J

Abstract:
1. A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air-side of the shaft seal from an oil-side of the shaft seal, comprising: an annular mounting portion; a seal body bonded to said mounting portion; a seal lip having an annular sealing surface extending between an oil-side end and a free air-side end, said sealing surface being configured to extend axially along the shaft; an annular bridge connected to said oil-side end of said seal lip by a hinge and to a central portion of said seal body by another hinge, said bridge extending in radially overlying relation to said seal lip; a primary dust lip extending from said air-side end, said primary dust lip having an annular rib configured for sealed abutment with a running surface of the shaft, said annular rib having at least one rib vent; and an auxiliary dust lip extending from said central portion of said seal body to a free end configured for sealed abutment with the running surface of the shaft, said free end of said auxiliary dust lip having at least one lip vent spaced circumferentially from said at least one rib vent in said annular rib.