US PATENT SUBCLASS 239 / 111
.~.~.~ Absence of fluid pressure opens drain

Current as of: June, 1999
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239 /   HD   FLUID SPRINKLING, SPRAYING, AND DIFFUSING

104  DF  WITH CLEANING MEANS, DRIP COLLECTING, WASTE DISPOSAL OR SOIL PREVENTING GUARDS OR SHIELDS {4}
106  DF  .~ Nozzle cleaner, flusher or drainer {5}
110  DF  .~.~ With separate drain or access opening {1}
111.~.~.~ Absence of fluid pressure opens drain

DEFINITION

Classification: 239/111

(under subclass 110) Apparatus having means which responds to the absence of fluid pressure to cause the additional opening

to be made available.

SEE OR SEARCH THIS CLASS, SUBCLASS:

109, for similar control means affecting the spray openings.