Rotary pump for blood and other sensitive liquids
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United States of America Patent
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Jun 10, 1986
Issued Date -
N/A
app pub date -
May 15, 1985
filing date -
May 12, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary piston pump for the displacement of blood has a single-lobe trochoidal surface along the peripheral wall of a housing and an eccentrically displaced rotary piston having a pair of opposite edges confronting this surface. The edges confronting the surface are rounded of circular arc curvature with a radius less than the equidistant between the theoretical epitrochoid of the orbits of these edges and the surface. A gap seal is thus provided which prevents damage to blood vessels when the pump is used for the circulation of blood, e.g. in an artificial heart.
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