US 12,420,079 B2
Blood pump with improved leakage control
Soumen Das, Danvers, MA (US); Qingchao Kong, Danvers, MA (US); Zhenghong Tao, Danvers, MA (US); and Alexander Ship, Danvers, MA (US)
Assigned to ABIOMED, INC., Danvers, MA (US)
Filed by ABIOMED, INC., Danvers, MA (US)
Filed on Apr. 19, 2024, as Appl. No. 18/640,108.
Application 18/640,108 is a continuation of application No. 17/144,570, filed on Jan. 8, 2021, abandoned.
Claims priority of provisional application 62/959,552, filed on Jan. 10, 2020.
Prior Publication US 2025/0090832 A1, Mar. 20, 2025
Int. Cl. A61M 60/411 (2021.01); A61M 60/135 (2021.01); A61M 60/806 (2021.01); A61M 60/829 (2021.01); F04D 9/00 (2006.01); F04D 13/06 (2006.01)
CPC A61M 60/411 (2021.01) [A61M 60/135 (2021.01); A61M 60/806 (2021.01); A61M 60/829 (2021.01); F04D 9/00 (2013.01); F04D 13/06 (2013.01); A61M 2207/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of reducing moisture ingress in a blood pump motor, the method comprising:
assembling the blood pump motor comprising a rotor portion having a proximal portion and a distal portion and a stator portion having a proximal portion and a distal portion;
receiving the proximal portion of the rotor portion into a cavity defined by the stator portion,
wherein the rotor portion comprises an impeller, wherein the impeller comprises impeller blades and a drive unit, the impeller blades positioned at the distal portion of the rotor portion and not received into the stator portion and the drive unit positioned in the proximal portion of the rotor portion received into the stator portion, wherein the drive unit is coupled to the impeller blades,
wherein the stator portion comprises a yoke, a coil and a coil holding sleeve, the yoke defining a cavity into which the coil holding sleeve is received, the coil disposed around and held on an exterior of the coil holding sleeve, the coil holding sleeve defining the cavity into which the proximal portion of the rotor portion is received,
wherein the yoke, the coil and the coil holding sleeve each have an interior surface and an exterior surface;
treating the exterior surface of the coil holding sleeve with a primer;
treating the interior surface of the yoke with the primer; and
injecting an epoxy between the yoke and the coil and the coil and the coil holding sleeve, thereby substantially embedding the coil in epoxy such that the primer is interposed between (i) the exterior surface of the coil holding sleeve and the epoxy and (ii) the interior surface of the yoke and the epoxy, and reduces moisture ingress in the blood pump motor.