US PATENT SUBCLASS 141 / 50
.~.~ Shifted to vent or fill pipe

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

37  DF  DIVERSE FLUID CONTAINING PRESSURE FILLING SYSTEMS INVOLVING RECEIVER GAS CONTENT MODIFICATION {11}
47  DF  .~ Gas control or supply varied, shifted or supplemented during cycle {3}
50.~.~ Shifted to vent or fill pipe

DEFINITION

Classification: 141/50

(under subclass 47) Apparatus in which a source of pressure, either positive or negative, is shifted from one use such as pressurizing or evacuating a receiver to another flow line which is a vent or fill pipe, usually for the purpose of emptying such pipe.

SEE OR SEARCH THIS CLASS, SUBCLASS:

55, for a vent to drain a fill pipe in diverse fluid filling systems.