Patent ID: 8820749

Claim:
A labyrinth sealing device comprising: a rotor comprising: a radially-oriented base portion having a radial outer end and a radial inner end opposite the radial outer end; a first axially oriented flange located between the radial outer end and the radial inner end; and a second axially oriented flange located at the radial inner end, the second axially oriented flange having a radially outer surface and a radially inner surface opposite the radially outer surface, wherein the radially outer surface is a running surface; wherein the first axially oriented flange and the second axially oriented flange extend in the same axial direction and wherein the first axially oriented flange is shorter than the second axially oriented flange; and a sealing stator comprising: a lip seal extending axially outward and having a radially outer surface and a radially inner surface opposite the radially outer surface, wherein the radially inner surface is an interface surface that rides directly against the running surface; and at least one ridge protruding from the sealing stator and contacting the radially-oriented base of the rotor, wherein at least a portion of the lip seal extends under but does not contact the first flange.