US PATENT SUBCLASS 49 / 23
.~ Water accumulator-type

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

21  DF  RESPONSIVE TO OR DIRECTLY ACTUATED BY AMBIENT FLUID {2}
23.~ Water accumulator-type

DEFINITION

Classification: 49/23

(under subclass 21) Device wherein the fluid reacting means includes a collector for water, e.g., a rain trap, so that the means is responsive to a predetermined amount or to the rate of increase of the fluid.