Patent ID: 7980836
Filing Date: 2011-07-19
Classification: F04C,Y10T

Abstract:
1. A compressor comprising: a housing; a plurality of identical planet rotors, each comprising a generally cylindrical shape with an axis of rotation extending therethrough, each of said plurality of identical planet rotors being equally spaced at a fixed distance from a centerline, and each of said plurality of identical planetary rotors having a helical profile on said cylindrical shape; a single sun rotor having an axis of rotation coaxial with said centerline, said single sun rotor including a helical profile, and said sun rotor helical profile being disposed to cooperate with said helical profiles on said plurality of identical planet rotors in the compression of gas; and, said sun rotor helical profile and said plurality of identical planet rotor helical profiles being sized and arranged to produce a first output when said plurality of identical planet rotors has four planet rotors, a second output when said plurality of identical planet rotors has three planet rotors, and a third output when said plurality of identical planet rotors has two planet rotors, said third output being one-half of said first output.