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US 10,369,260 B2Granted
Blood pump
AssigneeThe Cleveland Clinic Foundation
InventorsWilliam A. Smith, Markus Lorenz, David Dudzinski, Hsiang Ming Chen, Peter A. Chapman, Jr., Charles J. Prisco, Nicholas G. Vitale, Stephan Weber
Life of this patent
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Abstract
A blood pump (20) includes a stator assembly comprising a motor stator (52), a fluid inlet (24), and a fluid outlet (26). A rotor assembly includes a motor rotor (54) and an impeller (40) rotatable about an axis (44) to move fluid from the inlet (24) to the outlet (26). An outflow sheath (300) directs the flow along the outside of the pump (20).
Claims40
A blood pump comprising:
- a stator assembly comprising a motor stator, a fluid inlet, and a fluid outlet;
- a rotor assembly comprising a motor rotor and an impeller rotatable about an axis to move fluid from the inlet to the outlet;
- and
- a permanent magnet radial bearing for supporting the rotor assembly for rotation about the axis, the radial bearing comprising:
- a permanent magnet radial bearing stator fixed to the stator assembly and a permanent magnet radial bearing rotor fixed to the rotor assembly, the radial bearing being configured such that the radial bearing stator magnets and the radial bearing rotor magnets are axially offset from each other when the pump is at rest,
- wherein the blood pump further comprises front and rear stop points configured to limit an axial range of motion of the rotor assembly relative to the stator assembly in order to maintain the axial offset of the radial bearing stator magnets and the radial bearing rotor magnets when the pump is at rest, and wherein at least one of the front and rear stop points comprises a magnetic axial bearing.
3 more elements
Dependencies are inferred from the claim text.