Patent ID: 6481975
Filing Date: 2002-11-19
Classification: F04C,H02K

Abstract:
A switch reluctance motor and pump unit for pumping a fluid comprising:a stator assembly comprising a stator having coils wound in an axial format and further having at least two partially overlapping, cylindrical cavities, wherein an axis of a first cavity of the at least two partially overlapping cavities is parallel to an axis of a second cavity of the at least two partially overlapping cavities; a first rotor element rotatably disposed in the first cavity of the at least two partially overlapping cavities, wherein the first rotor element comprises a first spur gear having a first set of teeth and wherein the first set of teeth project radially outward from the first spur gear and are axially oriented; a second rotor element rotatably disposed in the second cavity of the at least two partially overlapping cavities, wherein the second rotor element comprises a second spur gear having a second set of teeth, wherein the second rotor element is disposed adjacent to the first rotor element, wherein the second set of teeth project radially outward from the second spur gear and are axially oriented, and wherein neither of the two rotor elements is disposed inside of the other rotor element; and wherein the stator assembly generates a radially aligned magnetic field, wherein the first set of teeth act as magnetic poles and interact with the magnetic field so as to produce a rotational movement of at least the first rotor element, wherein the second rotor element rotates in association with the rotation of the first rotor element, wherein the combined movement of the first rotor element and the second rotor element draws fluid into, and forces fluid out of, the pump and motor unit, and wherein the fluid is substantially contained between the stator assembly and the first and second rotor.