US PATENT SUBCLASS 222 / 437
.~.~.~ Barometric or angle of repose

Current as of: June, 1999
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222 /   HD   DISPENSING

424.5  DF  SUPPLY CONTAINERS WITH TRAPS {3}
425  DF  .~ With trap chamber cutoffs {11}
434  DF  .~.~ With discharge volume varying means {4}
437.~.~.~ Barometric or angle of repose

DEFINITION

Classification: 222/437

(under subclass 434) Dispensers in which the flow from the supply to the trap chamber is (1) of the barometric control type, or (2) is of the type where solid material in the trapping chamber builds up to its angle of repose and stops

flow from the supply, and means are provided to vary the volume delivered to the trap chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

353, for movable trap chambers of this type.

457, for miscellaneous chambers of this type not having volume varying means, and see the notes thereto for related art.

479, for dispensers having plural coterminous openings (usually tubular spouts), many of which are disclosed for operation on a barometric principle when used to deliver to an unclaimed receptacle.

SEE OR SEARCH CLASS 137, Fluid Handling,

261, and 453+ for barometric type fluid handling systems.