US 12,297,836 B2
Alternating pump gaps
Masamichi Yanai, Ann Arbor, MI (US); Shunzhou Yu, Ann Arbor, MI (US); and Tao Zhang, Ann Arbor, MI (US)
Assigned to TC1 LLC, St. Paul, MN (US)
Filed by TC1 LLC, St. Paul, MN (US)
Filed on Sep. 1, 2023, as Appl. No. 18/241,433.
Application 18/241,433 is a continuation of application No. 17/240,204, filed on Apr. 26, 2021, granted, now 11,781,551.
Application 17/240,204 is a continuation of application No. 16/443,471, filed on Jun. 17, 2019, granted, now 11,015,605, issued on May 25, 2021.
Application 16/443,471 is a continuation of application No. 15/041,987, filed on Feb. 11, 2016, granted, now 10,371,152, issued on Aug. 6, 2019.
Claims priority of provisional application 62/115,318, filed on Feb. 12, 2015.
Prior Publication US 2024/0052840 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F04D 13/06 (2006.01); A61M 60/232 (2021.01); A61M 60/237 (2021.01); A61M 60/422 (2021.01); A61M 60/538 (2021.01); A61M 60/82 (2021.01); A61M 60/824 (2021.01); F04D 29/047 (2006.01); F04D 29/048 (2006.01)
CPC F04D 13/064 (2013.01) [A61M 60/232 (2021.01); A61M 60/237 (2021.01); A61M 60/422 (2021.01); A61M 60/538 (2021.01); A61M 60/82 (2021.01); A61M 60/824 (2021.01); F04D 13/0646 (2013.01); F04D 13/0666 (2013.01); F04D 29/047 (2013.01); F04D 29/048 (2013.01); A61M 2205/3334 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A blood pump, comprising:
a chamber;
an impeller disposed within the chamber;
a motor that drives rotation of the impeller; and
a control system that controls operation of the motor, wherein the control system is configured to:
deliver a quadrature current to the motor that controls a rotational speed of the impeller; and
adjust a direct current supplied to the motor that controls a magnetic flux of electromagnetic coils of the motor to modify an attractive force on the impeller to move the impeller in an axial direction to alternate the impeller between a first balanced position and a second balanced position.