US PATENT SUBCLASS 110 / 319
.~.~ And flame shaper

Current as of: June, 1999
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110 /   HD   FURNACES

317  DF  INCLUDING FIREBOX {1}
318  DF  .~ Having arch {3}
319.~.~ And flame shaper

DEFINITION

Classification: 110/319

And flame shaper:

(under subclass 318) Apparatus provided with means having a series of relatively small openings designed to contour and direct the combustion flames onto the structure desired to be heated.

(1) Note. The flame shaper is generally located at the rear of the combustion chamber and usually designed to heat the water boiler tubes of a boiler heating system.