US PATENT SUBCLASS 239 / 39
.~.~ Barometric flow to secondary holder

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

34  DF  SLOW DIFFUSERS {9}
37  DF  .~ Gravity flow of liquid from supply holder {3}
39.~.~ Barometric flow to secondary holder {2}
40  DF  .~.~.~> Drip discharge from secondary holder {1}
42  DF  .~.~.~> Porous distributor to atmosphere

DEFINITION

Classification: 239/39

(under subclass 37) Apparatus in which the liquid flows from

its supply receptacle to an auxiliary reservoir and the flow is controlled by balancing flow (e.g., establishing equilibrium) with atmospheric pressure.

(1) Note. This type of flow is usually the inverted bottle type where the bottle is inverted into an open container and discharges therein until the level in the bottle drops and causes a vacuum to be formed therein, thus preventing any more discharge until the level in the container drops below the bottle neck to permit air to enter the bottle and displace additional liquid therefrom.

SEE OR SEARCH CLASS

137, Fluid Handling,

453+, for barometric means for maintaining a level of liquid in a fluid handling system.

222, Dispensing, 457, for angle of repose trap chambers.