Patent ID: 8167594

Claim:
A scroll compressor comprising: a non-orbiting scroll member having a base and a generally spiral wrap extending from its base; an orbiting scroll member having a base and a generally spiral wrap extending from its base, said wraps of said non-orbiting and orbiting scroll members interfitting to define compression chambers; a drive shaft for causing said orbiting scroll member to orbit relative to said non-orbiting scroll member; at least one of said non-orbiting and orbiting scroll members being operable to move in an axial direction toward the other of said non-orbiting and orbiting scroll members and a bias force to bias said at least one toward the other; a first of said non-orbiting and orbiting scroll members having at least a portion of its surface formed of a material that is harder than the material that it will contact on a second of said non-orbiting and orbiting scroll members, such that upon start-up there will be run-in and removal of the material; wherein one of said non-orbiting and said orbiting scroll members being formed of aluminum and provided with a hardening treatment, and the other of said non-orbiting and orbiting scroll members being formed of aluminum but not provided with a hardening treatment; wherein axial stops limit the axial movement of said at least one of said orbiting and non-orbiting scroll members; and wherein said non-orbiting scroll is allowed to move axially and contact said stops.