Pumps – Motor driven – Pump within rotary working member
Patent
1995-04-19
1996-12-31
Thorpe, Timothy S.
Pumps
Motor driven
Pump within rotary working member
415900, 604151, F04B 1703
Patent
active
055888127
ABSTRACT:
An implantable electric blood pump has a motor stator defining a cylindrical blood conduit, and a pump rotor in which the motor rotor is embedded. The pump rotor is conical at each of its ends and terminates at each end in a ball-and-cup structure washed directly by the pumped blood stream. Grooves may be formed in the ball-and-cup structure to enhance the heat-removing washing action of the blood stream. The pump rotor is nested in the stator blades to shorten the pump and wash the outlet bearing with a partially circumferential blood flow. Titanium-titanium carbide facing alumina are the preferred materials for the rotary-stationary interface, and the gap of the rotary-stationary interface is kept so small that no significant amount of blood serum can penetrate between the mating surfaces of the interface.
REFERENCES:
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Butler Kenneth C.
le Blanc Pieter W. J. C.
Maher Timothy R.
Taylor Lynn P.
Korytnyk Peter G.
Nimbus Inc.
Thorpe Timothy S.
Weissenberger Harry G.
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