US 11,850,412 B2
Intravascular blood pump rotor
Marius Grauwinkel, Aachen (DE); Jim-Po Wang, Danvers, MA (US); and Wolfgang Kerkhoffs, Aachen (DE)
Assigned to ABIOMED, INC., Danvers, MA (US)
Filed by ABIOMED, Inc., Danvers, MA (US)
Filed on Apr. 5, 2022, as Appl. No. 17/713,695.
Claims priority of provisional application 63/172,393, filed on Apr. 8, 2021.
Prior Publication US 2022/0323742 A1, Oct. 13, 2022
Int. Cl. A61M 60/221 (2021.01); A61M 60/148 (2021.01); A61M 60/824 (2021.01); A61M 60/82 (2021.01); A61M 60/422 (2021.01); F04D 13/02 (2006.01)
CPC A61M 60/221 (2021.01) [A61M 60/148 (2021.01); A61M 60/422 (2021.01); A61M 60/82 (2021.01); A61M 60/824 (2021.01); F04D 13/027 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An intravascular blood pump rotor, comprising:
a distal portion having a rotor hub tapering in a distal direction and configured to rotate around an axis of rotation, at least one blade extending outward from said rotor hub, and a distal end of said rotor hub extending distally beyond a most distal portion of said at least one blade; and
a proximal portion connected to the distal portion having permanent magnets arranged so as to form a modified Halbach array generating a magnetic field having a first magnetic flux in a proximal direction and a second magnetic flux in a distal direction, said first magnetic flux being greater than said second magnetic flux, said permanent magnets comprising an alternating arrangement of axial magnetized magnets and circumferential magnetized magnets,
wherein at least one of said axial magnetized magnets has a most proximal point or portion of a surface that is a different distance from said distal end as compared to a most proximal point or portion of a surface of at least one of said circumferential magnetized magnets.