US 7,462,019 B1
Implantable centrifugal blood pump with hybrid magnetic bearings
Paul E. Allarie, 805 Emerson Dr., Charlottesville, Va. 22901 (US); Gill B. Bearnson, 982 E. Jasper Cir., Salt Lake City, Utah 84106 (US); Ron Flack, 4265 Viewmount Rd., Earlysville, Va. 22936 (US); Pratap S. Khanwilkar, 1651 E. Shadow Cove, Salt Lake City, Utah 84121 (US); B. Ajit Kumar, Suite NE. 107, 825 N. 300 West, Salt Lake City, Utah 84103 (US); James W. Long, Jr., 4461 S. Parkview Dr., Salt Lake City, Utah 84124 (US); Don B. Olsen, 8832 Blue Jay La., Salt Lake City, Utah 84121 (US); Jeffrey Decker, 6387 Lake Trail Dr., Westerville, Ohio 43082 (US); and Michael Baloh, 206 Greentree Park Dr., Charlottesville, Va. 22901 (US)
Appl. No. 9/673,922
PCT Filed Apr. 22, 1999, PCT No. PCT/US99/08870
§ 371(c)(1), (2), (4) Date Aug. 24, 2001,
PCT Pub. No. WO99/53974, PCT Pub. Date Oct. 28, 1999.
Int. Cl. F04B 17/03 (2006.01); A61M 1/10 (2006.01)
U.S. Cl. 417—423.12  [604/151; 623/3.14] 13 Claims
OG exemplary drawing
 
1. A blood pump comprising:
a housing including a combination of permanent magnets and electromagnets positioned forming an electromagnetic bearing;
an impeller disposed within said housing, said impeller being magnetically suspended with respect to the housing by magnetic flux generated by the combination of permanent magnets and electromagnets, and rotated by an electric motor,
wherein the magnetic flux from the permanent magnet and the electromagnet shares a common magnetic path.