(under the class definition) Apparatus having structure within a flow path establishing or maintaining a body or stream of a fluid of one density in communication with a fluid of a second density.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60, for a heating and cooling system including a gas-liquid contact device.
226, for the automatic control of a gas and liquid contact device in a heating and cooling system.
SEE OR SEARCH CLASS
62, Refrigeration,
272+, for a heat absorber with means handling water condensed from the air, and subclasses 304+ for means specialized to cooling including a gas liquid contact device. 122, Liquid Heaters and Vaporizers,
34, for an indirectly heated liquid vaporizer having an internal vapor separator; subclasses 488 to 492 for a closed liquid vaporizer with a vapor-liquid separator; and subclass 508 for a steam dome for a liquid vaporizer.
126, Stoves and Furnaces,
113, for a hot air furnace with an air moistener and subclass 389 for an open liquid heating vessel with a vent.
137, Fluid Handling,
154+, for diverse fluid containing systems not specific to heat exchange.
210, Liquid Purification or Separation,
157+, for a liquid separator with an ancillary heat exchanger.
237, Heating Systems,
78, for a heating system radiator having an air moistener.
