US PATENT SUBCLASS 236 / 41
.~.~.~ With trap

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

36  DF  HEATING RADIATOR {4}
*  DD  .~ Exhaust operated {2}
40  DF  .~.~ Thermostatic {1}
41.~.~.~ With trap

DEFINITION

Classification: 236/41

(under subclass 40) Subject matter in combination with an automatic trap for discharging the air and water of condensation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53, through 60, under "Traps", for the specific automatic trap construction.

53+, for steam traps with float valve and thermostatically controlled air vent valve.