Patent ID: 6098987
Filing Date: 2000-08-08
Classification: F16J

Abstract:
A seal assembly for a groove in a relatively stationary machine part for sealing an axially displaceable machine part extending therethrough, said groove having first and second axially spaced walls and an outer radial wall, comprising:an annular seal element disposed in said groove having a radially inner dynamic sealing lip for bearing on said axially displaceable machine part, and a radially outer flexible static sealing lip for bearing on a one of said groove axial walls and biasing the inner sealing lip radially inward;an annular support element having a right circular cylindrical axially outer face engageable with said groove axial first wall, said support element further having an axially inner face shaped to accept said seal element in a nesting relationship;an annular axial element having a first axial face secured to said seal element and a second axial face adjacent said groove second axial wall, said axial element having a plurality of passages radially therethrough providing for fluid communication between said groove and said axially displaceable machine part thereby preventing said seal assembly from sealing in a reverse direction.