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IPC Main Group
F23L 9/00

Passages or apertures for delivering secondary air for completing combustion of fuel

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
COMBUSTION APPARATUS; COMBUSTION PROCESSES
Subclass:
SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES

3 direct subcodes

Child Classifications

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  • F23L 9/02 by discharging the air above the fire
  • F23L 9/04 by discharging the air beyond the fire, i.e. nearer the smoke outlet
  • F23L 9/06 by discharging the air into the fire bed