US PATENT SUBCLASS 239 / 109
.~.~.~.~ Reduction of fluid pressure affects opening (e.g., self-draining showers)


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}
107  DF  .~.~ With means for enlarging spray openings beyond normal operating position {1}
108  DF  .~.~.~ With separate fluid reacting surface {1}
109.~.~.~.~ Reduction of fluid pressure affects opening (e.g., self-draining showers)


DEFINITION

Classification: 239/109

(under subclass 108) Apparatus in which the absence of or the dropping of pressure below an established minimum causes opening of the spray openings beyond normal use position.