US PATENT SUBCLASS 122 / 40
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LIQUID HEATERS AND VAPORIZERS
> Fluid fuel
(under the class definition) Boilers in which liquid is flashed into vapor as soon as it enters the vapor generating chamber. The liquid may be preheated in a chamber forming
part of the unitary boiler structure or preheated in a chamber separate from the main vapor generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39, 242+ and 260, for progressive heaters.
247+, for progressively heated steam generators.
446, 448.1, 449, and 452, for regulating devices for flashers and progressively heated steam generators.
SEE OR SEARCH CLASS
60, Power Plants,
39.05, 39.3, 39.53+, and 106, for devices of that class having flash boilers.
219, Electric Heating,
271+, for electrically heated flash boilers.