Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Patent
1990-05-29
1991-12-03
Nilson, Robert G.
Fluid handling
Back flow prevention by vacuum breaking
Air vent in liquid flow line
137893, 137895, B01F 504
Patent
active
050692453
ABSTRACT:
A mixing valve is provided for mixing together two liquids in varying proportions and has the capability of being joined in series to other mixing valves, each of which, other than the first of the series, receives water from its adjacent valve.
REFERENCES:
patent: 3112884 (1963-12-01), Gilmour
patent: 3658091 (1972-04-01), Buzzi
patent: 4469137 (1984-09-01), Cleland
Nilson Robert G.
Tolco Corporation
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