Terumo Kabushiki Kaisha

Shotaro Tanaka

Yosuke Itamochi

Koko Kumano

A centrifugal pump for pumping blood includes a housingwith a housing main body, a blood inlet port, and a blood outlet port. A rotary bodyis rotatably accommodated inside the housing main body, and a support mechanismsupports the rotary body. The support mechanismis provided with a rod-like shaft member, and a first bearingand a second bearingwhich respectively and rotatably support end portions of the shaft member. The first bearingis provided with a protruding portionwhich protrudes in an eccentric manner with respect to a rotation center O when viewed from an upstream side of a blood flow, so that the protruding portion shields a counter-rotating, longitudinal side of the shaft member from exposure to the main flow of blood.

Centrifugal pump

A centrifugal blood pump reliably prevents blood from entering between an impeller and a shaft member. Pumpincludes a pump chamber, a housingincluding a blood inletand a blood outlet, an impelleras a centrifugal force applying member rotatably encased in the pump chamberand applying a centrifugal force to the blood Q by the rotation of the impeller. A support mechanismsupports impellerrotatably with respect to the housing. The support mechanismincludes a rod-shaped shaft memberdisposed at the rotation center of the impeller. Shaft memberand the impellerare formed integrally with each other, as by insert molding.

Growing community of inventors

Kanagawa, Japan

Shotaro Tanaka