Pumping feature on wear sleeve for unitized seal

A seal assembly for use with two relatively movable elements to be sealed, said assembly comprising a primary seal unit and an associated sheet metal wear sleeve, said primary seal unit including a casing for mounting relative to one of said two relatively moveable elements and a seal element including a circumferentially continuous elastomeric body having a portion bonded to said casing and another portion biased by its own innate resiliency toward said wear sleeve whereby snug, fluid-tight sealing contact may be made between a portion of said seal element and a mating surface of an associated wear sleeve, said associated wear sleeve having a radial flange and a generally cylindrical portion adapted to be fixed in fluid-tight relation to the second of said relatively movable elements, said cylindrical portion being of reduced thickness relative to the thickness of said radial flange and having thereon a surface pattern formed by metal cold flow during sleeve thickness reduction, said pattern including at least one hydrodynamic pumping element having a contoured portion radially offset from the remainder of said cylindrical portion.