Patent ID: 8534674

Claim:
A unitized radial fluid seal including: a shell comprising a substantially cylindrical, axially-extending first flange and a second flange extending substantially radially from the axially-extending first flange, a first elastomeric seal body affixed to the shell and comprising a radially-extending primary seal lip, a sleeve comprising a substantially cylindrical, axially-extending sealing flange and a protective flange extending substantially radially from the axially-extending sealing flange, a spring radially urging the primary seal lip into sealing contact with a sealing surface of the axially-extending sealing flange, and a second elastomeric seal body affixed to the sleeve and including a resiliently-elastic angled lip extending from a terminal end of the axially-extending sealing flange opposite of the radially-extending protective flange, wherein a first angle (a) defined by the sealing surface and an axially-outward facing surface of the angled lip extending from the sealing surface is between about 140-165° and the primary seal lip is axially retained between the angled lip and the radially-extending protective flange, an axially-inward facing surface is defined on the angled lip extending from an end of the axially-outward facing surface and a second angle (β) defined by the axially-inward facing surface of the angled lip and the radial direction is between about 50-70°, and a radially-inward, angled surface is defined on the angled lip extending from an end of the axially-inward facing surface and a third angle (γ) defined by the radially-inward, angled surface and the axial direction is between about 20-60°.