US PATENT SUBCLASS 122 / 321
.~ Standpipe


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

235.11  DF  WATER TUBE {52}
321.~ Standpipe {2}
322  DF  .~.~> Fluid fuel
323  DF  .~.~> Annular firebox


DEFINITION

Classification: 122/321

(under subclass 235) Devices having a vertical pipe relatively large in cross section and provided with some form of water tubes and not otherwise provided for.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13+, for range or kitchen boilers, called in the art "stand boilers", which are provided with a heater.

132, 133, 184, 185, 186, 215+, and 218, for sectional stand pipe boilers.

281, 307+ and 475, for stand pipes provided with spur water tubes.