US PATENT SUBCLASS 60 / 667
.~.~ Of means controlling boiler or its feed

Current as of: June, 1999
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60 /   HD   POWER PLANTS

643  DF  MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT {11}
660  DF  .~ Having condition responsive control {6}
667.~.~ Of means controlling boiler or its feed

DEFINITION

Classification: 60/667

(under subclass 660) Apparatus, in which the condition or flow of liquid being fed to the boiler or the quantity or condition of the liquid in the boiler is controlled by a condition responsive means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

665, for the automatic control of both the fuel and the liquid feed to the boiler.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

451.1, for the automatic control of the feed to a boiler. 236, Automatic Temperature and Humidity Regulation,

20+, for the automatic control of the pressure or temperature of a boiler.