US 12,465,745 B2
Centrifugal impeller for blood pump, and blood pump
Zengsheng Chen, Beijing (CN); Yuan Li, Beijing (CN); Yubo Fan, Beijing (CN); and Xiaoyan Deng, Beijing (CN)
Assigned to Beihang University, Beijing (CN)
Filed by Beihang University, Beijing (CN)
Filed on Nov. 23, 2022, as Appl. No. 17/993,363.
Claims priority of application No. 202210318493.8 (CN), filed on Mar. 29, 2022.
Prior Publication US 2023/0310831 A1, Oct. 5, 2023
Int. Cl. A61M 60/232 (2021.01); A61M 60/113 (2021.01); A61M 60/38 (2021.01); A61M 60/419 (2021.01); A61M 60/806 (2021.01)
CPC A61M 60/232 (2021.01) [A61M 60/113 (2021.01); A61M 60/38 (2021.01); A61M 60/419 (2021.01); A61M 60/806 (2021.01)] 14 Claims
OG exemplary drawing
 
1. A centrifugal impeller for a blood pump, comprising:
a base plate that is circular, wherein a through hole is formed in a middle of the base plate to form a secondary flow path;
centrifugal blades arranged at an upper surface of the base plate, wherein each of the centrifugal blades is a banana-shaped blade which is thick in middle and thin at two ends, a wrap angle of each centrifugal blade is greater than or equal to 90°, and the centrifugal blades extend radially from an outer edge of the through hole to a periphery of the base plate;
a supporting structure, comprising a supporting shaft and supporting blades, wherein the supporting shaft is arranged at a center of the through hole, one end of each supporting blade is connected to the supporting shaft, and another end of each supporting blade is connected to the base plate;
wherein, the supporting blades extend radially from a center of the top surface of the supporting shaft to an inner peripheral wall of the through hole; and
wherein, the centrifugal blades bend to a rotational direction of the centrifugal impeller, and a bending direction of the supporting blades is opposite to that of the centrifugal blades.