H - Electricity – 02 – K
Patent
H - Electricity
02
K
310/70
H02K 21/16 (2006.01) A61M 1/10 (2006.01) F04D 13/06 (2006.01) F04D 29/10 (2006.01) H02K 1/27 (2006.01) H02K 3/12 (2006.01) H02K 29/08 (2006.01)
Patent
CA 2020735
RADIAL DRIVE FOR IMPLANTABLE CENTRIFUGAL CARDIAC ASSIST PUMP ABSTRACT OF THE DISCLOSURE A centrifugal pump for left ventricle assist includes a pump housing forming an impeller chamber with inlet and outlet passages and enclosing an impeller rotatable to move blood or other fluids through the impeller chamber, and a rotor chamber enclosing a rotor integral with the impeller and rotatable to drive the impeller. A stator is mounted outside of a rotor casing forming the rotor chamber, concentric with, radially outward of and approximately axially aligned with the rotor. The stator includes a stator frame with an annular back iron and twenty-four teeth equally spaced apart and projected radially inwardly of the back iron. Three wires, one for each of three motor phases, are wound about the back iron, each including four symmetrically arranged active segments toroidally wound about the back iron, corresponding to four poles in a permanent magnet fixed to the rotor. Successive coils are wound in opposite toroidal directions, corresponding to an alternating and opposite arrangement of the poles of the magnet. -29-
Dorman Frank
Kent & Edgar
The Regents Of The University Of Minnesota
LandOfFree
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