Electrohydraulic energy converter for cardiac assist devices and artificial hearts
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United States of America Patent
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Sep 13, 1994
Grant Date -
N/A
app pub date -
Jun 25, 1991
filing date -
Jun 25, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for converting electric energy into pumping energy is disclosed. The apparatus is utilized to drive a cardiac assist device or an artificial heart. These devices are volume displacement blood pumps which require an alternating force or pressure for their pumping action. To generate this alternating pressure, a centrifugal pump driven by an electric motor pumps a hydraulic fluid which acts on the diaphragm of a blood pump. The alternating flow of the hydraulic transmitting fluid is generated by an axial shift of the impeller of the centrifugal pump.
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