US PATENT SUBCLASS 122 / 106
.~.~ Water wall

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

44.1  DF  FIRE TUBE {11}
51  DF  .~ Horizontal {22}
106.~.~ Water wall {2}
107  DF  .~.~.~> Drop water firebox
108  DF  .~.~.~> Subjacent water tube

DEFINITION

Classification: 122/106

(under subclass 51) Devices having water walls at the sides, front, or rear of the boiler, or at all of said locations. The wall may also extend across the boiler below the combustion chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

107, and 108, for similar art.