US PATENT SUBCLASS 236 / 53
.~.~ Thermostatic air valve

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

*  DD  TRAPS {3}
*  DD  .~ Float valve {1}
53.~.~ Thermostatic air valve

DEFINITION

Classification: 236/53

(under the class definition) Automatic steam-traps in which the water-drain valve is float-operated, but which are provided with a thermostatically-controlled air-vent.

SEE OR SEARCH CLASS

137, Fluid Handling,

171+, for steam traps in which there is no thermally controlled air vent.