Three-way valve for automatic sequencing of fluid flow

Details Three-way valve for automatic sequencing of fluid flow Three-way valve for automatic sequencing of fluid flow

1984-03-28

1985-03-26

Schwadron, Martin P.

Fluid handling

Processes

137113, 137606, 604 91, F16K 1100

Patent

active

045066914

ABSTRACT:
A three-way valve for automatic sequencing of fluid flow from a syringe into an IV administration set comprises a housing which forms a fluid chamber having a first and a second inlet and an outlet. A sleeve having a fluid passageway normally closed by a check valve is slidably disposed within the fluid chamber for reciprocal movement between a first position and a second position for respective fluid sealing engagement with the first and second inlets. With the sleeve in the second position, fluid flows through the chamber from the first inlet to the outlet. Engagement of a syringe with the second inlet urges the sleeve into the first position to permit fluid flow from the syringe into the second inlet and through the chamber to the outlet. Upon emptying of the syringe, the syringe plunger seals the second inlet and urges against a probe that opens the check valve to permit resumption of fluid flow from the first inlet to the outlet.

REFERENCES:
patent: 2312686 (1943-03-01), Campbell
patent: 2854027 (1958-09-01), Kaiser et al.
patent: 3057370 (1962-10-01), Hamilton
patent: 3280834 (1966-10-01), Zahuranec
patent: 3352531 (1967-11-01), Kilmarx
patent: 3353724 (1967-11-01), Johnston
patent: 3385301 (1968-05-01), Harautuneian
patent: 3799171 (1974-03-01), Patel
patent: 3965910 (1976-06-01), Fischer
patent: 3985133 (1976-10-01), Jenkins et al.
patent: 4159102 (1979-06-01), Fallon et al.

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