Downhole roller vane motor and roller vane pump
Hydraulic power transmission system
Radially extended vapor inlet for a rotary multivaned expander
Roller displacement motor
Rotary compressor
Rotary compressor with valve in rotor
Rotary hydraulic machine with a multiplicity of axially aligned
Rotary hydraulic piston motor with fluid path in pistons for inl
Rotary variable expansible chamber-kinetic hybrid pump
Vane type rotary compressor