Patent ID: 7891955

Claim:
A compressor comprising: a housing; a slide valve assembly positioned at least substantially within the housing, the assembly comprising: a volume slide valve mechanism, the mechanism slidably movable to control compressor volume ratio and power input to the compressor; and a capacity and volume slide valve mechanism that is in operational association with the volume slide valve mechanism, the capacity and volume slide valve mechanism slidably movable to control compressor capacity and to control volume ratio and power input to the compressor; wherein the capacity and volume slide mechanism further includes an opening or port which is at least one of: i) sized at least in part based on a desired compressor volume ratio; ii) shaped or contoured to correspond to a rotor groove angle of the rotor; iii) in fluid communication with an exhaust passage; and wherein the capacity and volume slide valve mechanism further includes an edge bounding the opening or port, and the volume slide valve mechanism includes an edge, and wherein the capacity and volume slide valve mechanism is movable with respect to the volume slide mechanism such that the capacity and volume slide valve mechanism edge is aligned with the volume slide valve mechanism edge so as to increase efficiency of the compressor.