.~ System with plural openings, one a gas vent or access opening {3}
589
.~.~ With vented outlet
DEFINITION
Classification: 137/589
(under subclass 583) Systems having a valved discharge
conduit and means connecting such conduit with the atmosphere downstream of the valve, whereby the conduit may be drained of liquid after the valve has been closed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215+, for air vents in liquid lines comprising siphon breakers for back flow prevention.
312+, for apparatus for collecting leakage or drip.
596+, for apparatus comprising stop and waste valves, and see the search notes thereto.
