US PATENT SUBCLASS 110 / 298
.~ Hollow grate

Current as of: June, 1999
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110 /   HD   FURNACES

297  DF  INCLUDING NONCOMBUSTIBLE FLUID SUPPLY MEANS {3}
298.~ Hollow grate {1}
299  DF  .~.~> Having flow controller {1}

DEFINITION

Classification: 110/298

Hollow grate:

(under subclass 297) Apparatus wherein the fluid supply means is composed of a mechanical structure provided with an internal closed cavity for allowing the fluid to pass therethrough such that mechanical structure is additionally used to support the fuel during combustion.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

232, for a sectional boiler provided with a water grate; and subclasses 371+ for a boiler with a water grate.

126, Stoves and Furnaces,

152+, for a grate for a furnace, stove, or range.