Fluid handling – Systems – With flow control means for branched passages
Patent
1976-11-29
1978-10-10
Schwadron, Martin P.
Fluid handling
Systems
With flow control means for branched passages
73422GC, 251 611, F16K 31126, G01N 100
Patent
active
041191200
ABSTRACT:
Apparatus for switching a fluid stream, either gaseous or liquid, between a first path and a second path is disclosed. A pair of enclosures are formed by two depressions in a first plate (each depression having an inlet and an outlet) and an elastomeric diaphragm covering the depressions. The diaphragm is held in place by a second plate having a first control inlet opposite one depression and a second control inlet opposite the other depression. A fluid to be switched is connected into the inlets of the first plate in common. By alternately applying a control fluid to one control inlet and then the other of the second plate, the fluid to be switched is switched from one outlet to the other by the diaphragm alternately being deformed into one depression and then the other by the control fluid so as to seal the inlet and outlet and, thereby, block the flow of fluid therethrough from the inlet to the outlet. A plurality of such switching pairs are shown interconnected to provide a plurality of switching actions from a single control fluid switched source. A preferred embodiment for switching three inputs and three outputs is disclosed particularly adapted for sample loop switching in apparatus such as gas chromatographs.
REFERENCES:
patent: 2371632 (1945-03-01), Lippincott
patent: 2479177 (1949-08-01), Miller
patent: 2677390 (1954-05-01), Davis et al.
patent: 3186234 (1965-09-01), Solnick et al.
patent: 3633426 (1972-01-01), Broerman
Mehaffy Gordon E.
Sawa Kenneth B.
Beckman Instruments Inc.
Chambers A. Michael
Harder P. R.
Schwadron Martin P.
Steinmeyer R. J.
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