Patent ID: 7562878

Claim:
A hydrodynamic rotary seal for location by a machine component for dynamic sealing engagement with a relatively rotatable surface and serving as a partition between a first fluid of a lubricant supply and a second fluid, comprising: a static sealing surface adapted to form a sealing interface with the machine component; a generally circular dynamic lip comprising: a first wave having a first multi-function edge, at least a portion of said first multi-function edge forming a first ramp section; a second wave having a second multi-function edge, at least a portion of said second multi-function edge forming a second ramp section, wherein said first and second ramp sections are adapted to curve toward the relatively rotatable surface; an elongated dimple including a dimple flank having a generally convex curve-like profile when viewed in longitudinal transverse cross-section, said elongated dimple having a first side formed in part by said first ramp section and a second side formed in part by said second ramp section; and first and second dimple fillets, said dimple fillets having a generally concave curve-like profile when viewed in longitudinal transverse cross-section and having a sloping profile in the circumferential direction, said dimple fillets being substantially tangent to said dimple flank.