Centrifugal blood pump with hydrodynamic bearing
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United States of America Patent
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Aug 17, 2021
Grant Date -
Sep 3, 2015
app pub date -
Oct 11, 2013
filing date -
Oct 12, 2012
priority date (Note) -
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Abstract
A centrifugal blood pump without a mechanical bearing comprises a pump casing (1), an impeller (9) arranged in the pump casing rotatably about the central axis and freely movable axially and radially within a limited clearance. The impeller has permanent magnets or permanently magnetized magnetic regions (N/S) which cooperate with an electromagnetic drive to set the impeller rotating. A circular wall (12) or circularly arranged wall sections are provided within the pump casing, their inner surfaces defining a radial clearance together with the outer circumference of the impeller to form a hydrodynamic radial bearing for the impeller.
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