US PATENT SUBCLASS 122 / 286
.~.~.~ Downdraft

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

235.11  DF  WATER TUBE {52}
*  DD  .~ Over bridge wall {3}
*  DD  .~.~ Water grate {2}
286.~.~.~ Downdraft

DEFINITION

Classification: 122/286

(under subclass 235) Water tube boilers having water tubes extending over the bridge wall and provided with a downdraft water grate.