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Blood Pump Having a Magnetically Suspended RotorA blood pump preferably has a magnetically suspended rotor that rotates within a housing. The rotor may rotate about a stator disposed within the housing. Radial magnetic bearings may be defined within the stator and the rotor in order to suspend the rotor. The radial magnetic bearings may be passive magnetic bearings that include permanent magnets disposed within the stator and the rotor or active magnetic bearings. The pump may further include an axial magnetic bearing that may be either a passive or an active magnetic bearing. A motor that drives the rotor may be disposed within the housing in order to more easily dissipate heat generated by the motor. A primary flow path is defined between the rotor and the stator, and a secondary flow path is defined between the stator and the rotor. Preferably, a substantial majority of blood passes through the primary flow path. The secondary flow path is large enough so that it provides adequate flushing of the secondary flow path while being small enough to permit efficient operation of the radial magnet bearings across the secondary flow path.
Document ID
20020089601
Acquisition Source
Langley Research Center
Document Type
Other - Patent
External Source(s)
LAR-16040-1
Authors
James F Antaki
Bradley Paden
Gregory Burgreen
Nelson J Groom
(Langley Research Center Hampton, United States)
Date Acquired
August 20, 2013
Publication Date
June 12, 2001
Subject Category
Mechanical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-Patent-6,244,835
Patent Application
US-Patent-Appl-SN-356662
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