Stabilizing drive for contactless rotary blood pump impeller
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United States of America Patent
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Jul 12, 2011
Issued Date -
N/A
app pub date -
Jan 16, 2007
filing date -
Jan 13, 2006
priority date (Note) -
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Importance
Abstract
A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.
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