Positive displacement machine, more particularly pump, and metho
Rotary engine having low thermal conductivity rotor
Rotary fluid machine having hollow vanes and refrigeration appar
Rotary machine with peripherally contacting rotors and end face
Rotary pump apparatus with plural abutting pumping segments
Rotary pump with orbiting rotor of harder material than stator
Rotary trochoidal compressor with compressible sealing