Pumps – With condition responsive pumped fluid control – Plural paths having individual condition responsive control...
Patent
1997-05-16
2000-06-13
Kim, Ted
Pumps
With condition responsive pumped fluid control
Plural paths having individual condition responsive control...
417188, 137100, 137569, 169 14, 169 15, F04B 4900
Patent
active
060741767
ABSTRACT:
A proportional fluid injector apparatus utilizing foaming agents. A pump is connected to a foaming agent and is operably connected to a differential proportional valve having a venturi. A first diaphragm control valve is operably connected between the pump and the venturi. A second diaphragm control valve is operably connected between the downstream and upstream sides of the pump and is also connected to a pilot line connected upstream of the venturi. The spring pressure exerted on the diaphragm in the first control valve is such that excess fluid from the pump returns upstream of the pump when the downstream pressure in the pump exceeds a predetermined value.
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Conkin David W.
Matkin Burns L.
de Kock Elbie R.
Kim Ted
LandOfFree
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