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Magnetically suspended fluid pump and control system

  • US 5,928,131 A
  • Filed: 11/26/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 11/26/1997
  • Status: Expired due to Fees
First Claim
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1. A blood pump apparatus implantable in a patient comprising:

  • a. a hollow stator member having an interior wall portion and a stator pump portion;

    b. a rotor member having an outer wall portion and a rotor pump portion and said rotor member disposed in said hollow stator member for rotation therein;

    c. a magnetic suspension having a stator magnet portion carried by said stator member and a rotor magnet portion carried by said rotor member, said stator member and rotor magnet portions cooperating to magnetically support said rotor member radially in said hollow stator member such that an annular magnetic suspension gap is created between said interior wall portion and said outer wall portion;

    d. a magnetic drive having a stator motor portion carried by said stator member and a rotor motor portion carried by said rotor member, said stator motor portion and said rotor motor portion cooperating to magnetically rotate said rotor member relative to said stator member to pump blood through said stator and rotor pump portions; and

    e. a Lorentz-force axial bearing having a stator axial bearing portion carried by said stator member and a rotor axial bearing portion carried by said rotor member, said stator axial bearing portion and said rotor axial bearing portion cooperating to magnetically support said rotor member axially in said stator member.

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