US PATENT SUBCLASS 141 / 119
.~.~ Interconnected supply valve cut-off and vacuum control

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

115  DF  DRIP PREVENTION BY FLOW REVERSING AND/OR OVERFILL REMOVAL {3}
116  DF  .~ By means reversing direction of flow {4}
119.~.~ Interconnected supply valve cut-off and vacuum control

DEFINITION

Classification: 141/119

(under subclass 116) Apparatus in which flow reversal is caused by a negative pressure means which is controlled by a means simultaneously operative with the contents material supply control means.