US 12,226,623 B2
Rotary blood pump
David Busch, Munich (DE); John C. Marous, III, Pittsburgh, PA (US); Anthony S. McCoppin, Blawnox, PA (US); and Robert G. Svitek, Freeport, PA (US)
Assigned to CARDIACASSIST, INC.
Filed by CARDIACASSIST, INC., Pittsburgh, PA (US)
Filed on Sep. 13, 2023, as Appl. No. 18/367,841.
Application 18/367,841 is a continuation of application No. 17/146,183, filed on Jan. 11, 2021, granted, now 11,786,719.
Application 17/146,183 is a continuation of application No. PCT/US2019/014685, filed on Jan. 23, 2019.
Claims priority of provisional application 62/702,562, filed on Jul. 24, 2018.
Prior Publication US 2023/0414924 A1, Dec. 28, 2023
Int. Cl. A61M 60/232 (2021.01); A61M 60/113 (2021.01); A61M 60/221 (2021.01); A61M 60/422 (2021.01); A61M 60/814 (2021.01); A61M 60/825 (2021.01); F04D 7/04 (2006.01); F04D 25/06 (2006.01); F04D 29/046 (2006.01); F04D 29/42 (2006.01)
CPC A61M 60/232 (2021.01) [A61M 60/113 (2021.01); A61M 60/221 (2021.01); A61M 60/422 (2021.01); A61M 60/814 (2021.01); A61M 60/825 (2021.01); F04D 7/04 (2013.01); F04D 25/06 (2013.01); F04D 29/046 (2013.01); F04D 29/426 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A centrifugal blood pump comprising:
a housing having a pumping chamber, an inlet with an inlet axis, and an outlet with an outlet axis, the inlet and the outlet being in fluid communication with the pumping chamber;
an impeller rotatably disposed within the pumping chamber;
at least one bearing supporting the impeller within the pumping chamber; and
a strut connected to the housing at the inlet to support at least a portion of the bearing;
wherein the strut has a first radial end fixed to an inner sidewall of the housing and a second radial end protruding radially inward toward the inlet axis, wherein the strut has a teardrop cross-sectional shape and widens from a first axial end defining a leading edge proximate the inlet to a maximum thickness point and then gradually narrows to a second axial end defining a trailing edge, wherein the maximum thickness point is closer to the first axial end than the second axial end, wherein the first axial end of the strut slopes downward toward the impeller as it extends from the inner sidewall of the housing toward the inlet axis.