Centrifugal blood pump with tapered seal

Details Centrifugal blood pump with tapered seal Centrifugal blood pump with tapered seal

F - Mech Eng,Light,Heat,Weapons

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F04D 29/08 (2006.01) A61M 1/10 (2006.01) F04D 13/02 (2006.01) F04D 29/12 (2006.01) F04D 29/22 (2006.01)

Patent

CA 1249748

CENTRIFUGAL BLOOD PUMP WITH TAPERED SHAFT SEAL ABSTRACT OF THE DISCLOSURE A centrifugal blood pump has a tapered seal between a pump housing wall and a hub of an impeller which provides a fluid tight seal interface surrounding a drive shaft which is connected to the impeller and which extends through the pump housing wall . The tapered seal has a maximum radial dimension adjacent to the wall and a minimum radial dimension adjacent the hub so that air bubbles (which seek the smallest shaft diameter) will not insulate the seal interface edges from fluid flow. The seal interface , which is perpendicular to the drive shaft axis, is located in a high flow area between the wall and the hub to increase cooling effects.

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