US PATENT SUBCLASS 122 / 246
.~.~.~ Annular 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}
*  DD  .~ Coil or loop {1}
244  DF  .~.~ Central standpipe {2}
246.~.~.~ Annular firebox

DEFINITION

Classification: 122/246

(under subclass 244) Devices extending below the grate and forming an annular firebox.

SEE OR SEARCH THIS CLASS, SUBCLASS:

184, for a stand pipe, provided with water tubes located in a vertical flue boiler and having an annular firebox.

335, for miscellaneous water tube boilers with an annular firebox.