Direct drive linear flow blood pump
OwnerSheldon Changinventor
Life of this patent
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Abstract
A ventricular assistive device (VAD) based on a progressive cavity pump includes a pump housing having an inlet and an outlet, a pump stator contained within the pump housing, a pump rotor rotatably disposed within the pump stator, a motor including a motor rotor contained within the pump housing and a direct drive means connected between the motor rotor and an axial shaft of the pump rotor for rotating the pump rotor. The motor rotates the motor rotor, which in turn rotates the pump rotor through the direct drive means. The rotation of the pump rotor within the pump stator forms a plurality of cavities that carry blood forward through the pump housing from the inlet to the outlet as the motor drives the direct drive means.
Claims21
An axial flow blood pump comprising:
- a pump housing having an inlet and an outlet;
- a pump stator contained within said pump housing;
- a pump rotor rotatably disposed within said pump stator, said pump rotor including an axial shaft;
- a motor including a motor rotor contained within said pump housing, said motor rotating said motor rotor;
- and
- a direct drive means coupled to said axial shaft of said pump rotor for rotating said pump rotor,
- wherein said rotation of said pump rotor within said pump stator forms a plurality of cavities, said cavities carrying blood forward through said pump housing from said inlet to said outlet as said motor drives said direct drive means.
A method for pumping blood through an axial flow pump including an inlet and an outlet, the method comprising the steps of:
- directly rotating a pump rotor rotatably mounted within a pump stator of said pump with a motor of said pump thereby forming a plurality of moving cavities between said pump rotor and said pump stator;
- and
- carrying blood from said inlet to said outlet via said moving cavities.
- wherein said motor includes a motor rotor and said pump rotor is directly rotated by a direct drive means coupling said motor rotor and an axial shaft of said pump rotor.
Dependencies are inferred from the claim text.