Patent ID: 8398089
Filing Date: 2013-03-19
Classification: F16J,Y10T

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 rigid mounting portion; an elastomeric material bonded to said rigid mounting portion, said elastomeric material forming a seal body including a seal lip spaced radially inwardly from said rigid mounting portion, said 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 relative to the shaft; an annular bridge connected to said oil side end of said seal lip by a first hinge and to said mounting portion by a second hinge, said bridge extending radially outwardly from said first hinge to said second hinge in radially overlying relation to said seal lip; and an annular projection molded from said elastomeric material as an extension of said seal body, said annular projection extending radially inwardly from said rigid mounting portion and extending axially away from said bridge toward the air side of said radial shaft seal to a free end, said projection having an oil side facing said seal lip and being configured to confront said free air side end of said seal lip upon said seal lip pivoting about said first hinge toward said projection.