Reverse moineau motor
Rotary displacement pumps
Rotary helical fluid motor with deformable sleeve for deep drill
Rotary positive displacement machine with helicoid surfaces of p
Rotary pump with cutter device for contaminated fluids
Rotary screw machine of volume type and method of...
Rotary screw pump with suction vanes at intake port
Rotor and flexible drive shaft assembly
Rotor drive coupling for progressing cavity pump
Rotor for eccentric helical gear pump