Abstract: A compact, electronically operated, rotary positive displacement pumping device having a stator which functions as an electric motor stator and also as pump stator, a rotor or rotors which function as electric motor rotor or rotors and also as pump rotor or rotors, and a highly efficient and effective magnetic flux path which has low reluctance, said flux path being used in a magnetic drive arrangement to impart rotation to the rotor or rotors to create a pumping action.

Abstract: An improved slotted stator electric machine for use in various rotary and linear applications. The machine is significantly quieter in operation, is resistant to corrosion, and operates at increased electrical and magnetic efficiency with augmented performance without adding significantly to its weight and cost. The machine uses non-magnetic, and high compressive strength spacers which are installed between the stator teeth to create or facilitate a compressive force in an inner ring comprised of the spacers and the inner portion of the teeth. Through the interaction of the teeth pieces, this creates or facilitates an opposing tension in the outer ring of the stator which strengthens and stabilizes the stator assembly. A ceramic/porcelain enamel material or other bonding agent can also be used to coat, bond together, increase the compressive strength and to further stabilize and secure the stator and/or rotor laminations while providing corrosion resistance.

Abstract: A compact, electronically operated, rotary positive displacement pumping device having a stator which functions as an electric motor stator and also as pump stator, a rotor or rotors which function as electric motor rotor or rotors and also as pump rotor or rotors, and a highly efficient and effective magnetic flux path which has low reluctance, said flux path being used in a magnetic drive arrangement to impart rotation to the rotor or rotors to create a pumping action.