Patent ID: 7956509

Claim:
An electric pump for discharging a liquid, the electric pump comprising: an electric motor, said electric motor including a coil wound in a ring form, a stator core formed along said coil in a tubular form so that different magnetic poles are formed alternately in the circumferential direction as said coil is energized, said core having a molded portion, formed by molding a non-magnetic material, at least on the inner periphery thereof, and a rotor disposed to be opposed to said magnetic pole forming portions of said stator core so that different magnetic poles are formed in the circumferential direction, said rotor rotating in a liquid; and a pump structural body adapted to discharge a liquid as a rotational force is given to said pump structural body by said rotor; wherein said non-magnetic material and said magnetic pole are formed alternately on the inner peripheral surface of said stator core; and wherein said stator core and said rotor are housed in a motor housing, and a rotation stop mechanism is provided between the side end portion of said pump structural body disposed along the inner periphery of said motor housing and said stator core to restrict the relative rotation of said stator core.