Patent ID: 7854432

Claim:
A dynamic seal, comprising: an annular mounting portion; an axially extending leg extending from a radially inner end of said mounting portion; a radially extending leg having a radially outer end and a radially inner end, said radially outer end adjacent said axially extending leg, said radially extending leg extending inwardly from an end of said axially extending leg; and a seal leg extending only in a single axial direction from said radially inner end of said radially extending leg and having a proximal heel end attached at said radially inner end of said radially extending leg, said seal leg being generally conically shaped and including a radially inner face adapted to engage a rotary shaft and a radially outer face having a region of increased thickness, said radially extending leg adapted to bias said proximal heel end toward the rotary shaft, said region of increased thickness being spaced from a distal end of said seal leg and said heel end so as to provide a biasing force to cause an entirety of said seal leg extending from a location axially between said region of increased thickness and said distal end to said distal end to take on a cylindrical form when engaged with a shaft.