Patent ID: 8328535

Claim:
A compressor section for a fluid boosting device ( 100 ), the compressor section comprising: a compressor housing ( 103 ) defining at least in part an impeller chamber ( 321 ), a diffuser ( 225 ) and a volute ( 230 ); a compressor impeller ( 121 ) mounted in the compressor housing ( 103 ); a diffuser ring ( 206 , 206 ′) having a plurality of compressor vanes ( 207 ) positioned in the diffuser ( 225 ); and a restraint system ( 300 , 300 ′, 500 ) that seals the diffuser ring ( 206 , 206 ′) and biases the diffuser ring ( 206 , 206 ′) thereby abutting the plurality of compressor vanes ( 207 ) against an opposing wall of the diffuser ( 225 ), the restraint system ( 300 , 300 ′, 500 ) being defined by a single O-ring ( 350 , 350 ′, 550 ).