Volumetric pump/valve

Details Volumetric pump/valve Volumetric pump/valve

1995-06-06

1997-02-18

Rivell, John

Fluid handling

Systems

Multi-way valve unit

137862, 251324, 2513352, 251364, F16K 11065, F16K 144

Patent

active

056033540

ABSTRACT:
A volumetric pump for administering intravenous fluids to a patient comprises a housing having an elongate cavity therein with an open and a closed end. A resilient sheet of material having a centrally-located aperture covers the open end, and a pump shaft is slidably disposed through the aperture to form a sphincter seal therebetween. An inlet conduit leading from a fluid source (an IV bag) passes through the housing into the cavity near the open end thereof, and an outlet conduit leading to a fluid sink (the patient) passes through the housing from the cavity near the closed end thereof. The shaft is driven back and forth in reciprocating motion inwardly and outwardly of the cavity to produce, respectively, a positive pressure forcing fluid out of the outlet conduit to the fluid sink, and a negative pressure forcing fluid from the fluid source through the inlet conduit.

REFERENCES:
patent: 695589 (1902-03-01), Storle
patent: 1460628 (1923-07-01), Wertz
patent: 1536415 (1925-05-01), Beck et al.
patent: 1795815 (1931-03-01), Winter
patent: 2645449 (1953-07-01), Gulick
patent: 2653580 (1953-09-01), Moore, Jr.
patent: 2782801 (1957-02-01), Ludwig
patent: 2856961 (1958-10-01), Kruschik
patent: 3463193 (1969-08-01), Yost
patent: 3552441 (1971-01-01), Luhleich
patent: 4159024 (1979-06-01), Getman

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