.~ Removable closure guided in rotary movement (e.g., screw) {6}
303
.~.~ With valve or vent means
DEFINITION
Classification: 220/303
(under subclass 288) Device wherein the closure is provided with a valve or vent, such valve or vent usually for the purpose of allowing gas to escape from the closed receptacle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
202+, for a condition responsive (e.g., to pressure) vent or valve on a closure.
231, for vacuum breakers and/or manually operable vents or valves;
366.1, for vent means located at the juncture of the closure-closure support;
367.1, for closure having vent means therein. SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating,
176, for bell and tank type gas holders.
96, Gas Separation: Apparatus, for apparatus for gas separation, per se. Class 220 takes vents for closures for receptacles combined with gas separating means wherein the gas separator is recited by name only, or the claim includes details of the receptacle (e.g., splash plate in the receptacle or vent, etc.) or of the closure (e.g., configuration or means for attaching to the receptacle, etc.).
137, Fluid Handling,
493, for valves which open in response to either pressure or vacuum, and subclass 587 for fluid handling systems having two or more openings one of which is a gas vent for a tank and the other is a liquid inlet and/or outlet.
215, Bottles and Jars,
307+, for devices under that class definition having vents or valves therein.
251, Valves and Valve Actuation,
144, for closure-mounted or receptacle-mounted valves where no more of the closure or container is claimed than is necessary to mount, support or accommodate the valve. The closure or receptacle all may form part of the valve structure, e.g., the valve seat where no further structural modification of the closure or receptacle is involved other than the means to mount, support or accommodate the valve.
429, Chemistry: Electrical Current Producing Apparatus, Product, and Process,
53+, and 82 for battery having venting structure. 454, Ventilation,
195, for means combined with a door for ventilating a room.
