US 11,872,385 B2
Blood pump with magnetically loaded partial arc journal bearing
William Smith, Cleveland, OH (US)
Assigned to THE CLEVELAND CLINIC FOUNDATION, Cleveland, OH (US)
Appl. No. 16/980,795
Filed by THE CLEVELAND CLINIC FOUNDATION, Cleveland, OH (US)
PCT Filed Mar. 13, 2019, PCT No. PCT/US2019/021964
§ 371(c)(1), (2) Date Sep. 14, 2020,
PCT Pub. No. WO2019/178173, PCT Pub. Date Sep. 19, 2019.
Claims priority of provisional application 62/642,756, filed on Mar. 14, 2018.
Prior Publication US 2021/0085954 A1, Mar. 25, 2021
Int. Cl. A61M 1/00 (2006.01); A61M 60/82 (2021.01); A61M 60/824 (2021.01); A61M 60/148 (2021.01); A61M 60/178 (2021.01); A61M 60/825 (2021.01); A61M 60/812 (2021.01); A61M 60/422 (2021.01); A61M 60/237 (2021.01)
CPC A61M 60/82 (2021.01) [A61M 60/148 (2021.01); A61M 60/178 (2021.01); A61M 60/237 (2021.01); A61M 60/422 (2021.01); A61M 60/812 (2021.01); A61M 60/824 (2021.01); A61M 60/825 (2021.01); A61M 2205/103 (2013.01); A61M 2210/125 (2013.01)] 69 Claims
OG exemplary drawing
 
1. A blood pump comprising:
a pump housing having a pump inlet and a pump outlet spaced apart along a longitudinally extending central pump axis;
a rotating assembly comprising an impeller; and
partial arc journal bearings that support the rotating assembly for rotation in the housing, wherein the rotating assembly is rotatable relative to the housing to pump blood from the pump inlet to the pump outlet, wherein each of the partial arc journal bearings comprises a cylindrical journal component of the rotating assembly and a bushing component fixed to the housing, the bushing having a partial arc configuration extending partially around the circumference of the journal;
wherein the blood pump further comprises magnetic rings that help constrain axial movement of the rotating assembly relative to the housing, the magnetic rings being configured to exert a net radial force on the rotating assembly that pulls the journals into their associated bushings.