Implantable electric axial-flow blood pump with blood cooled bearing
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Sep 13, 1996
filing date -
Apr 19, 1995
priority date (Note) -
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Abstract
An axial-flow blood pump has a rotor suspended in ball-and-cup bearings which are blood-cooled but not actively blood-lubricated. The ball-and-cup structures are made of highly heat-conductive material and are in heat-transferring contact with heat-conductive stator blades that serve as heat sinks for the bearings. The ball-and-cup structures are radially much smaller than the stator blades. The ball-and-cup interface has so small a gap that the ball-to-cup structures present an essentially continuous surface to the blood flow.
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