Progressive cavity pump/motor

Progressive cavity pump/motor stator, and apparatus and...

Progressive cavity pumps using composite materials

Progressive cavity transducer

Progressive-cavity pump with composite stator and...

Protective shroud for the shaft of a helical gear pump

Pump/motor apparatus using 2-lobe stator

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

Screw pump stators

Sealed bearing means for in hole motors

Sealed bearings