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US Patent 10143787 Impeller shaft to bearing interface for centrifugal blood pump

Patent 10143787 was granted and assigned to Terumo Corporation on December, 2018 by the United States Patent and Trademark Office.

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Patent abstract

A centrifugal pump (10) includes a housing (26), an impeller (28) that is rotatably disposed inside the housing (26), a shaft (62) that is provided at a center rotational axis of the impeller (28), and bearings (70) that pivotally support the shaft ends (66). At least one of the shaft ends (66) has surface roughness Ra equal to or less than 0.21 μm and/or surface roughness Ry equal to or less than 1.49 μm.

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