.~.~.~> Vent and inlet or outlet in unitary mounting
DEFINITION
Classification: 137/587
(under subclass 583) Systems in which one of the openings is a gas vent for a tank and another is a liquid inlet and/or outlet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
136+, 143 and 144, for vents and air release means for siphons.
154+, for gas release from diverse fluid containing pressure systems, especially subclasses 197+ for discriminating outlets for gas in diverse fluid containing pressure systems.
213+, for gas vents in systems utilizing a gas pressure over a liquid in which the vent opens or closes in response to
liquid level, the gas escape frequently producing a signal whistle.
215+, for air vents in liquid lines comprising vacuum breakers for back flow prevention. 469+, and 511+, for safety valves, and see the search notes thereto.
SEE OR SEARCH CLASS
220, Receptacles,
366.1, for vents in metallic and other receptacles, subclass 86.1+ for filling attachments for receptacles.
222, Dispensing,
39, for audible signals in dispensers, subclasses 478+ for gas vents combined with other openings in dispensing systems, especially subclass 479 for vent pipes substantially coterminous with an outlet pipe, as in barometric devices, and subclass 481.5 for dispensing systems having movable, flexible or remotely connected vent pipes.
