US 12,011,580 B1
Impeller of cardiac assist device, and cardiac assist device
Yuncong Yang, Shanghai (CN); Xi Liu, Shanghai (CN); Haishan Wang, Shanghai (CN); and Qifeng Yu, Shanghai (CN)
Assigned to SHANGHAI PHIGINE MEDICAL CO. LTD, Shanghai (CN)
Appl. No. 18/575,816
Filed by SHANGHAI PHIGINE MEDICAL CO. LTD, Shanghai (CN)
PCT Filed Jul. 7, 2022, PCT No. PCT/CN2022/104252
§ 371(c)(1), (2) Date Dec. 29, 2023,
PCT Pub. No. WO2023/280245, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 202110766881.8 (CN), filed on Jul. 7, 2021.
Int. Cl. A61M 60/408 (2021.01); A61M 60/122 (2021.01); A61M 60/216 (2021.01); A61M 60/221 (2021.01); A61M 60/237 (2021.01); A61M 60/438 (2021.01); A61M 60/806 (2021.01)
CPC A61M 60/216 (2021.01) [A61M 60/122 (2021.01); A61M 60/438 (2021.01); A61M 60/806 (2021.01)] 18 Claims
OG exemplary drawing
 
1. An impeller of a cardiac assist device, comprising an impeller shaft and a plurality of blades;
a shape of the plurality of blades is set such that: blade cascades of the plurality of blades are of arc lines that recess towards a same side, and each of the blade cascades conforms to a function:

OG Complex Work Unit Math
wherein, r* is a radius of a cylindrical surface where the function is located, θ is an angle dependent variable, z is an axial dependent variable, t is an independent variable, and 0≤t≤1, and a and b are coefficients; and the blade cascade is a planar unfolding shape of an intersection line where the cylindrical surface intersects with the blade.