US PATENT SUBCLASS 141 / 298
.~.~ Concentric vent forms valve stem

Current as of: June, 1999
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141 /   HD   FLUENT MATERIAL HANDLING, WITH RECEIVER OR RECEIVER COACTING MEANS

285  DF  MULTIPLE PASSAGE FILLING MEANS FOR DIVERSE MATERIALS OR FLOWS {10}
297  DF  .~ Funnel type {3}
298.~.~ Concentric vent forms valve stem

DEFINITION

Classification: 141/298

(under subclass 297) Filling devices having a flow controller and stem therefor and in which the means defining the said stem is concentric with the outlet conduit and forms a passage open to the ambient atmosphere at least while the supply outlet is open.

SEE OR SEARCH THIS CLASS, SUBCLASS:

295, for concentric open vents in diverse passage heads having a receiver-operated supply valve.