US 12,029,890 B2
Magnetic drives having flux enhancers for blood pumps
Travis J. Schauer, Rockford, MN (US); Joseph Alan Kronstedt, New Hope, MN (US); Benjamin Breidall, Eden Prairie, MN (US); and Megan Johnson, Dayton, MN (US)
Assigned to Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed by Boston Scientific Scimed, Inc., Maple Grove, MN (US)
Filed on Dec. 29, 2020, as Appl. No. 17/137,175.
Claims priority of provisional application 62/964,099, filed on Jan. 21, 2020.
Prior Publication US 2021/0220636 A1, Jul. 22, 2021
Int. Cl. A61M 60/419 (2021.01); A61M 60/13 (2021.01); A61M 60/216 (2021.01); A61M 60/221 (2021.01); F04D 3/00 (2006.01); F04D 13/02 (2006.01)
CPC A61M 60/419 (2021.01) [A61M 60/13 (2021.01); A61M 60/216 (2021.01); A61M 60/221 (2021.01); F04D 3/005 (2013.01); F04D 13/024 (2013.01); F04D 13/027 (2013.01); A61M 2205/0216 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A magnetic drive system of a blood pump, the magnetic drive system comprising:
an impeller;
a drive shaft coupled to the impeller and configured to rotate with the impeller;
a driven magnet assembly coupled to at least one of the drive shaft and the impeller; and
a driving magnet assembly magnetically coupled to and thereby configured to drive the driven magnet assembly, wherein the driven magnet assembly including a first flux enhancer and the driving magnet assembly including a second flux enhancer, the first flux enhancer and the second flux enhancer comprising a soft magnetic material.