Patent ID: 8590903

Claim:
A dynamic seal assembly, comprising: an outer housing defining a bore and having an air side and an oil side; a shaft rotatably received in said bore; a seal received in said bore and engaging said shaft, said seal separating said air side from said oil side, said seal including: an annular mounting portion; an axially extending portion having first inner and outer surfaces each extending in a first axial direction from said annular mounting portion and parallel to a central axis of said annular mounting portion in an un-installed state, said first outer surface of said axially extending portion being cylindrical, said first axial direction extending away from the oil side of said dynamic seal, said mounting portion defining a bumper having a cylindrical inner surface spaced radially outward from and parallel to said cylindrical outer surface of said axially extending portion by a gap distance; a radially extending portion having second inner and outer surfaces each extending radially inwardly from an end of said axially extending portion and entirely perpendicular to said central axis in an un-installed state; a generally conically shaped seal portion extending from an end of said radially extending portion toward the oil side of the dynamic seal and in a direction opposite said first axial direction, said seal portion including a radially inner face engaging said shaft and having a seal lip free edge facing said oil side of said dynamic seal, wherein said gap distance prevents the axially extending portion from deflecting more than 60 degrees from parallel with the central axis, wherein said bumper, said axially extending portion and said generally conically shaped seal portion are each made from a same material.