US PATENT SUBCLASS 165 / 279
.~ Pressure and temperature responsive or control


Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

200  DF  WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
279.~ Pressure and temperature responsive or control {1}
280  DF  .~.~> Bypass of heat exchanger responsive to both temperature and pressure


DEFINITION

Classification: 165/279

Pressure and temperature responsive or control:

(under subclass 200) Subject matter wherein the heat transfer apparatus has control means reacting to both pressure and temperature conditions or controlling both pressure and temperature conditions of the heat transfer apparatus.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation,

92, for thermostatic control of hot and cold with diverse sensor (e.g., humidity, pressure, etc.), subclass 92 for thermostatic control of heating and cooling.