US PATENT SUBCLASS 210 / 116
.~.~ Permitted by filtrate accumulation

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}
116.~.~ Permitted by filtrate accumulation

DEFINITION

Classification: 210/116

(under subclass 109) Apparatus wherein the discharge outlet is normally closed and permits discharge of filtrate responsive to filtrate accumulation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

114, for means controlling discharge of a heavier constituent responsive to treated liquid accumulation.

117+, for valve means responsive to change in direction of the flow to prevent backflow.