US PATENT SUBCLASS 122 / 377
.~.~.~ Updraft

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

371  DF  WATER GRATE {5}
*  DD  .~ Water firebox {2}
*  DD  .~.~ Solid and water bar {1}
377.~.~.~ Updraft

DEFINITION

Classification: 122/377

(under subclass 371) Devices not otherwise provided for having a water firebox with an updraft fuel grate composed of both solid bars and water bars.

SEE OR SEARCH THIS CLASS, SUBCLASS:

206, 213, 229, 353, for other boilers with this type of water grate.

375, for the grate structure of this type of grate.