Implantable blood pump
A blood pump having a rotor and a stator, in which the rotor has a filled core channel and a plurality of filled radial channels configured to maximize the communication of magnetic flux.
1. An implantable blood pump, comprising:
a rotatable impeller comprising a rotor core having a longitudinal axis, the rotor core comprising a first material and a channel aligned substantially along the longitudinal core axis;
a core material, different from the first material, within the longitudinal channel;
a plurality of substantially radially-oriented channels configured to extend from the longitudinal channel outwardly; and
a magnetic material within each of the radially-oriented channels, the magnetic material and the core material in magnetic flux communication.
2. The blood pump of claim 1 wherein the radially-oriented channels extend along blades of the impeller.
3. The blood pump of claim 1 wherein the radially-oriented channels are capped by a sleeve.
4. The blood pump of claim 1 wherein a weld secures a sleeve over the radially-oriented channels.
5. The blood pump of claim 1 wherein a first magnetic material in a first one of the radially-oriented channels aligned in a first blade is in magnetic flux communication with a second magnetic material in a second one of the radially-oriented channels aligned in a second blade through the core material.
6. The blood pump of claim 1 wherein a first plurality of the radially-oriented channels is aligned along a first blade and a second plurality of the radially-oriented channels is aligned along a second blade.
7. The blood pump of claim 6 , wherein the blades are of varying pitch along their length.
8. The blood pump of claim 1 wherein the core material is magnetic.
9. The blood pump of claim 1 wherein the core material is non-magnetic.
10. The blood pump of claim 1 wherein the core material is titanium.
11. The blood pump of claim 1 wherein the core material is iron.
12. The blood pump of claim 1 wherein the core material is a polymer.
13. The blood pump of claim 1 wherein the magnetic material is Neodymium Iron Boron.
14. The blood pump of claim 1 wherein a north pole of the magnetic material in one of the radially-oriented channels is positioned next to a south pole of the magnetic material in an adjacent one of the radially-oriented channels.
15. The blood pump of claim 1 wherein a north pole of the magnetic material in one of the radially-oriented channels is positioned across from a south pole of the magnetic material in the radially-oriented channel on an opposite side of the rotor core.
16. The blood pump of claim 1 wherein the core material is in physical contact with the magnetic material in the radially-oriented channels.
17. An implantable blood pump, comprising:
a rotatable impeller comprising a rotor core having a longitudinal axis and a plurality of blades extending outwardly from the rotor core,
the rotor core comprising a rotor material and having a central channel aligned substantially along the longitudinal axis;
a core material, different from the rotor material, within the central channel;
a plurality of substantially radially-oriented channels along each blade and extending from the central channel outwardly; and
a magnetic material within each of the radially-oriented channels, the magnetic material and the core material in physical communication.
18. The blood pump of claim 17 wherein a north pole of the magnetic material in one of the radially-oriented channels is positioned next to a south pole of the magnetic material in an adjacent one of the radially-oriented channels.
19. The blood pump of claim 17 wherein a north pole of the magnetic material in one of the radially-oriented channels is positioned across from a south pole of the magnetic material in the radially-oriented channel on an opposite side of the rotor core.