Patent ID: RE40554

Claim:
A scroll-type compressor comprising: a bearing housing; a first scroll member movably supported on said bearing housing, said first scroll member including a first end plate and a first spiral wrap provided on one side thereof; a second scroll member supported on said bearing housing, said second scroll member including a second end plate and a second spiral wrap provided on one side thereof; a drive member; a radially compliant coupling drivingly connecting said drive member to said first scroll member whereby said drive member operates to orbit said first scroll member with respect to said second scroll member at a first orbiting radius wherein said first and second spiral wraps are intermeshed and define sealed moving fluid pockets which decrease in size as they move from a radially outer position to a radially inward position; a chamber; a pin member movably disposed in said chamber, said pin member being movable from a first position at which said first scroll member orbits at said first orbiting radius and a second position in which said pin member restricts the orbiting radius of said first scroll member to a magnitude less than said first radius whereby leakage paths are formed between said moving fluid pockets; and a drive system for reciprocating said pin between said first and second positions to thereby modulate the capacity of said compressor.