Pumps – Motor driven – Electric or magnetic motor
Patent
1997-01-31
1999-09-07
Freay, Charles G.
Pumps
Motor driven
Electric or magnetic motor
41742312, 41742314, 415229, 415900, 416174, F04B 1700, F01D 2500, F03B 1300, B63H 100
Patent
active
059477032
ABSTRACT:
A centrifugal blood pump assembly according to one aspect of the invention includes a housing, an impeller adapted to rotate within the housing for feeding blood, an impeller position control device, and an impeller rotation torque generating device. The impeller rotates without contacting the inner surface of the housing when the position control device and torque generating device are operative. Even when the position control device is inoperative, operation of the torque generating device enables rotation of the impeller while a blood flowpath is defined between the surface of the impeller facing the torque generating device and the inner surface of the housing. A centrifugal blood pump assembly according to another aspect of the invention involves a pump including a housing having blood inlet and outlet ports and an impeller adapted to rotate within the housing for feeding blood. The assembly also includes an uncontrolled magnetic bearing arrangement for the impeller, and controlled magnetic bearing arrangement for the impeller. The bearing arrangements are removably mounted to the pump.
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Akamatsu Teruaki
Nakazeki Tsugito
Nojiri Toshihiko
Freay Charles G.
NTN Corporation
Ratcliffe Paul L.
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