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US 8,882,477 B2Granted
Magnetically levitated and driven blood pump and method for using the same
AssigneeCircuLite, Inc.
InventorsBryan Patrick Fritz, IV, Martin David Simon
Life of this patent
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Abstract
A device for pumping blood, includes a housing having a distal end adapted to be coupled to a catheter, a proximal end having an outlet, and a tubular body extending between the distal and proximal ends along an axis. A rotor is rotatably disposed within the housing. A first magnetic bearing is operative to levitate the rotor along the axis within the housing. A second magnetic bearing controls a rotational frequency of the rotor. A third magnetic bearing controls a radial position of the rotor.
Claims24
A device for pumping blood, comprising:
- a housing having a distal end adapted to be coupled to a catheter, a proximal end having an outlet, and a tubular body extending between said first distal and proximal ends along an axis;
- a rotor rotatably disposed within the housing;
- a first magnetic bearing operative to levitate the rotor along the axis within the housing;
- a second magnetic bearing controlling a rotational frequency of the rotor;
- a third magnetic bearing controlling a radial position of the rotor;
- at least one Hall Effect sensor sensing the radial position and rotational frequency of the rotor;
- and
- a controller operatively coupled to the sensor, wherein the controller is configured to selectively send a current to the second magnetic bearing to change or maintain the radial position and the rotational frequency of the rotor.
5 more elements
A device for pumping blood, comprising:
- a housing having a distal end adapted to be coupled to a catheter, a proximal end having an outlet, and a tubular body extending between the distal and proximal ends along an axis;
- a rotor rotatably disposed within the housing;
- a first magnetic bearing further comprising first and second permanent magnets and operative to levitate the rotor to an axial position within the housing;
- a second magnetic bearing further comprising a plurality of vertically arranged pairs of electromagnetic coils and a pole structure coupled to the rotor, the second magnetic bearing configured to change or maintain a rotational frequency of the rotor;
- a third magnetic bearing further comprising the plurality of vertically arranged pairs of electromagnetic coils and the first permanent magnet, the third magnetic bearing configured to change or maintain a radial position of the rotor;
- a Hall Effect sensor sensing the radial position and rotational frequency of the rotor;
- and
- a controller operably coupled to the Hall effect sensor and configured to communicate with the coils to change or maintain the radial position and rotational frequency of the rotor.
5 more elements
Dependencies are inferred from the claim text.