(under the class definition) Apparatus in which a liquid, maintained at the desired location by some form of reservoir, is used as a seal or closure between adjacent parts of a system containing either a gas or a liquid which is lighter than the sealing liquid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
138+, for periodic siphon discharge by release of trapped air through a liquid trap seal.
154+, for diverse fluid containing pressure systems, especially subclasses 154 and 172 for those containing plural liquids and 171+ for fluid separating traps and vents.
246+, for liquid sealing at the valve interface by supplying the sealing liquid to the flow path or directly to the valve interface.
505.31, and 505.4, for reactor surface of the inverted cup type having liquid seal. SEE OR SEARCH CLASS
4, Baths, Closets, Sinks, and Spittoons, appropriate subclasses for liquid trap seals and valves combined with the subject matter of the class.
222, Dispensing,
188, for fluid trap seals for dispenser inlets and outlets, including vents.
399, Electrophotography,
237+, for liquid developer applied to a latent image within an electrophotos:graphic device.
