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US 10,441,693 B2Granted
Axial flow blood pump with radially offset rotor
AssigneeHeartWare, Inc.
InventorsJeffrey A. Larose, Carlos Reyes, Charles R. Shambaugh
Life of this patent
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Abstract
A blood pump including a housing defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end. A ferromagnetic rotor is disposed within the housing and configured pump blood in a direction along the first axis. A stator is disposed within housing and around the ferromagnetic rotor, the stator is configured to apply a magnetic force causing rotation of the ferromagnetic rotor, the stator being eccentric to the rotor.
Claims16
A blood pump, comprising:
- a housing defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end;
- a ferromagnetic rotor disposed within the housing and configured pump blood in a direction along the first axis;
- and
- a single stator disposed within housing and around the ferromagnetic rotor, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic rotor;
- a non-ferromagnetic tubular body disposed between the rotor and the stator and co-axial with the first axis, the rotor being entirely disposed within the non-ferromagnetic tubular body the stator being affixed within the housing at a predetermined non-uniform radial distance from an exterior surface of the tubular body to an inner diameter of the stator;
- and during operation of the blood pump, the rotor is maintained at a predetermined non-uniform radial distance from the tubular body and the stator is eccentric to the rotor.
3 more elements
A blood pump, comprising:
- a housing having an inflow cannula sized to be implanted with a human heart, the inflow cannula defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end;
- a ferromagnetic impeller disposed within the housing proximate to the proximal end of the inflow cannula, the impeller defining a second axis and configured impel blood in a direction along the second axis;
- and
- a single stator disposed within housing and around the ferromagnetic impeller, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic impeller around the second axis, and during use, the stator defines a third axis offset from the second axis and offset from the first axis;
- and
- a non-ferromagnetic tubular body disposed within the inflow cannula and around the impeller, the tubular body being co-axial within the first axis, the stator being affixed within the housing at a predetermined non-uniform radial distance from an exterior surface of the tubular body to an inner diameter of the stator.
3 more elements
A blood pump, comprising:
- a housing having an inflow cannula sized to be implanted with a human heart, the inflow cannula defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end;
- a ferromagnetic impeller defining a plurality of hydrodynamic bearings disposed within the housing proximate to the proximal end of the inflow cannula, the impeller defining a second axis parallel to the first axis and configured impel blood in a direction along the second axis;
- a single stator disposed within housing and around the ferromagnetic rotor, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic impeller around the second axis, and during use, the stator defines a third axis parallel to the second axis;
- and
- a non-ferromagnetic tubular body disposed within the inflow cannula, the impeller being disposed within and surrounded by the non-ferromagnetic tubular body, the tubular body being co-axial within the first axis, and during use, the tubular body being eccentric with the impeller and creating a fluid gap between the impeller and the tubular body, the fluid gap being non-uniform around the impeller, the stator being affixed within the housing at a predetermined non-uniform radial distance from an exterior surface of the tubular body to an inner diameter of the stator.
2 more elements
Dependencies are inferred from the claim text.