Rotary pump for blood and other sensitive liquids

Details Rotary pump for blood and other sensitive liquids Rotary pump for blood and other sensitive liquids

1985-05-15

1986-06-10

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

418152, 128 1D, 128DIG3, 623 3, F04C 222, A61F 222, A61M 112

Patent

active

045940606

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.

REFERENCES:
patent: 807421 (1905-12-01), Dickison
patent: 4218199 (1980-08-01), Eiermann
patent: 4296500 (1981-10-01), Monties et al.
"Pulsatile Flow Blood Pump Based on the Wankel Engine", by N. Verbiski et al., Journal of Thoracic & Cardiovascular Surgery, vol. 57, No. 5, May 1969, pp. 753-756.

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