Pumps – Motor driven – Pump within rotary working member
Patent
1997-11-18
1999-09-14
Freay, Charles G.
Pumps
Motor driven
Pump within rotary working member
41742312, 415900, 604151, F04B 1700, F03B 1300, A61M 100
Patent
active
059512636
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-to-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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Damm et al. (1994), Axial Flow Ventricular Assist Device: System Performance Considerations, Artificial Organs, vol. 18:44-48.
Ohara et al. (1994), An Ultimate, Compact, Seal-less Centrifugal Ventricular Assist Device: Baylor C-Gyro Pump, Artificial Organs, vol. 18(1): 17-24.
Butler Kenneth C.
le Blanc Pieter W. J. C.
Maher Timothy R.
Taylor Lynn P.
Freay Charles G.
Nimbus Inc.
Ratcliffe Paul L.
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