US PATENT SUBCLASS 236 / 56
.~.~ Expanding fluid

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

*  DD  TRAPS {3}
*  DD  .~ Thermostatic {3}
56.~.~ Expanding fluid {2}
57  DF  .~.~.~> Bourdon type
58  DF  .~.~.~> Wafer type

DEFINITION

Classification: 236/56

(under the class definition) Automatic steam-traps in which the drain-valve is directly operated by a thermostat of the expanding-fluid type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41, for radiator heat controls incorporating a similar device.

64, for air relief valve of similar type.