US PATENT SUBCLASS 110 / 182
.~ Feeding air

Current as of: June, 1999
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110 /   HD   FURNACES

181  DF  DOOR CASINGS AND ARCHES {1}
182.~ Feeding air

DEFINITION

Classification: 110/182

(under subclass 181) Arches and casings with circulation conduits through which air or air and steam are passed to be fed to the furnace.

SEE OR SEARCH THIS CLASS, SUBCLASS:

180, for casings having conduits for cooling them through which air, steam, or water circulates, such steam or air not passing into the furnace.

192, for time limit controls.

SEE OR SEARCH CLASS

126, Stoves and Furnaces,

112, for devices for feeding air to hot air furnaces.