Fositive displacement pulse free rotary fluid pump

Details Fositive displacement pulse free rotary fluid pump Fositive displacement pulse free rotary fluid pump

1979-11-21

1981-05-05

Vrablik, John J.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

F04C 216

Patent

active

042656060

ABSTRACT:
A positive displacement rotary pump for providing substantially pulse free fluid transfer including a pair of intermeshed cylindrical rotor members having alternating helically arranged ribs and flutes. The pitch and dimensions of the ribs and flutes is such that a rib-flute pair just breaks contact as the adjacent rib-flute makes contact, thereby presenting a substantially constant driving surface to the fluid resulting in continuous fluid flow through the pump. In a preferred embodiment, helical drive gears having teeth pitched oppositely to the rotor member ribs are positioned outside of the fluid flow path to drive one of the rotor members from the other.

REFERENCES:
patent: 1927418 (1933-09-01), Rowlands et al.
patent: 2159744 (1939-05-01), Maglott
patent: 2530173 (1950-11-01), Oldberg
patent: 3424373 (1969-01-01), Gardner
patent: 3865523 (1975-02-01), Baehr
patent: 3986801 (1976-10-01), Garland

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