Patent ID: 8550467

Claim:
A rotary seal for bi-directional rotation, the rotary seal in an uncompressed condition comprising: a generally ring-shaped seal body having a circumference, said seal body having a circumferential dynamic lip and first and second seal ends disposed in substantially opposed relation; said dynamic lip comprising a lubricant side flank, a circumferential dynamic surface having an end at an abrupt dynamic exclusionary intersection, and an axially-oriented inlet curvature, said lubricant side flank located entirely radially outward of said dynamic surface, said lubricant side flank blended by said axially-oriented inlet curvature to said dynamic surface, said axially-oriented inlet curvature located between said lubricant side flank and said dynamic surface said lubricant side flank sloped relative to said dynamic surface in an axial direction and axially separated from said abrupt dynamic exclusionary intersection by a varying distance, said dynamic surface having an axial width defined by an axial length between said axially-oriented inlet curvature and said abrupt dynamic exclusionary intersection, said dynamic surface axial width varies along at least part of said circumference of said seal body, said dynamic surface having wider surface axial width locations and narrower surface axial width locations; said dynamic lip having an axial width defined by an axial length of said dynamic surface, said axially-oriented inlet curvature and said lubricant side flank, said dynamic lip axial width varies along at least part of said circumference of said seal body, said dynamic lip having wider lip axial width locations and narrower lip axial width locations; and said axially-oriented inlet curvature varies in curvature along at least part of said circumference of said seal body, said inlet curvature being a tighter curve at at least some of said wider lip axial width locations than at at least some of said narrower lip axial width locations, and being a tighter curve at at least some of said wider surface axial width locations than at at least some of said narrower surface axial width locations.