US PATENT SUBCLASS 122 / 258
.~ Downflow

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

235.11  DF  WATER TUBE {52}
258.~ Downflow

DEFINITION

Classification: 122/258

(under subclass 235) Water tube boilers provided with means for causing a downward flow of water in the tubes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39, for analogously operating boilers.

209, and 218, for sectional boilers with a down flow of water through the sections.