US PATENT SUBCLASS 210 / 111
.~.~ Responsive to prefilt accumulation or filter clogging

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

97  DF  FLOW, FLUID PRESSURE OR MATERIAL LEVEL, RESPONSIVE {14}
109  DF  .~ Discharge of treated material {5}
111.~.~ Responsive to prefilt accumulation or filter clogging

DEFINITION

Classification: 210/111

(under subclass 109) Apparatus responsive to liquid to be treated or to an increase in pressure upstream of a filter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99, for means diverting prefilt to drain responsive to prefilt accumulation.

130+, for bypass means responsive to pressure.