Metering pump with annular elements

Details Metering pump with annular elements Metering pump with annular elements

1986-06-06

1988-04-19

Smith, Leonard E.

Pumps

Serially formed pumping chambers

F04B 1914

Patent

active

047385987

ABSTRACT:
An apparatus for pumping fluid includes a pump block having a wall surface defining an elongate passageway. Annular elements are movable in the passageway and include deformable peripheral skirts on their rearward ends dimensioned to sealingly engage the wall surface of the passageway to isolate fluid sections between successive elements. The passageway includes portions of changing cross-sectional area and ports provide fluid flow communication with the portions of changing cross-sectional area. The peripheral skirts of the elements are configured to undergo deformation, rather than direct compression, when moving through the portions of changing cross-sectional area to effect pumping action through the ports. The manner in which the skirts of the elements deform minimizes friction when the elements move through the portions of changing cross-sectional area. Another embodiment is shown which employs nondeformable annular elements.

REFERENCES:
patent: 872423 (1907-12-01), Hodell
patent: 882576 (1908-03-01), Murray
patent: 1857896 (1932-05-01), Vellino
patent: 3859010 (1975-01-01), Lofquist, Jr.
patent: 3924973 (1975-12-01), Lofquist, Jr.

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