Patent ID: 8157551

Claim:
A scroll compressor comprising: a first scroll member having a base and a generally spiral wrap extending from said base; a second scroll member having a base and a generally spiral wrap extending from its base; a shaft driven to rotate, and to in turn cause said second scroll member to orbit relative to said first scroll member, orbiting of said second scroll member relative to said first scroll member compresses a fluid entrapped in compression chambers between the wraps of the first and second scroll members, and the fluid being compressed towards a discharge port in the first scroll member, and delivered into a discharge pressure chamber; a face of the base of the second scroll member being in contact with a thrust bearing, said thrust bearing including a back pressure pocket, internal to said thrust bearing and a seal for sealing said back pressure pocket to entrap a compressed fluid, and a tap for tapping fluid at a discharge pressure into said back pressure pocket; a wear plate being positioned on a rear face of said second scroll member and facing said thrust bearing; and said seal including a ring that is in contact with said wear plate, and said ring providing said seal.