US PATENT SUBCLASS 122 / 340
.~.~.~.~ Tubes over firebox

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
332  DF  .~ Vertical {10}
*  DD  .~.~ Annular lower drum {4}
338  DF  .~.~.~ Annular upper drum {2}
340.~.~.~.~ Tubes over firebox

DEFINITION

Classification: 122/340

(under subclass 338) Devices in which the water tubes are within the space inclosed by the vertical tubes over the firebox.