US PATENT SUBCLASS 236 / 66
.~.~.~ Expanding solid

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

*  DD  AIR-RELIEF VALVES {1}
*  DD  .~ Radiator type {1}
*  DD  .~.~ Thermostatic {5}
66.~.~.~ Expanding solid

DEFINITION

Classification: 236/66

(under the class definition) Air relief-valves controlled by a thermostat only, the thermostat being of the expanding-solid type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53, 59 and 62, for other applications of this control.