F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING AND HEATING
 F23
COMBUSTION APPARATUS; COMBUSTION PROCESSES
 F23

Note(s)

In this class, the following terms are used with the meanings indicated:

  1. "Combustion" means the direct combination of oxygen gas, e.g. in air, and a burnable substance. Any other heat-producing combination of chemical substances, e.g. hydrogen peroxide and methane, iron oxide and aluminium, is provided for in Section C or in sub-class F24J.
  2. "Combustion chamber" means a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame.
  3. "Burner" means a device by which fluent fuel is passed to a combustion space where it burns to produce a self-supporting flame.
  4. "Air" means a mixture of gases containing free oxygen and able to promote or support combustion.

 F23L
AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS (air-supply arrangements for fluent fuels F23C; dampers and throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24)
 F23L 1/00
Passages or apertures for delivering primary air for combustion
 F23L 1/02
·  by discharging the air below the fire
 F23L 3/00
Arrangements of valves or dampers before the fire
 F23L 5/00
Blast-producing apparatus before the fire
 F23L 5/02
·  Arrangements of fans or blowers (fans or blowers per se F04)
 F23L 5/04
·  by induction of air for combustion, e.g. using steam jet
 F23L 7/00
Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
 F23L 9/00
Passages or apertures for delivering secondary air for completing combustion of fuel
 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
 F23L 11/00
Arrangements of valves or dampers after the fire
 F23L 11/02
·  for reducing draught by admission of air to flues
 F23L 13/00
Construction of valves or dampers for controlling air supply or draught (in general F16K)
 F23L 13/02
·  pivoted about a single axis but having no other movement (formed as linked slats each pivoted about an axis F23L 13/08)
 F23L 13/04
·  ·  with axis perpendicular to face
 F23L 13/06
·  slidable only
 F23L 13/08
·  operating as a roller blind; operating as a venetian blind
 F23L 13/10
·  having a compound movement involving both sliding and pivoting
 F23L 15/00
Heating of air supplied for combustion
 F23L 15/02
·  Arrangements of regenerators
 F23L 15/04
·  Arrangements of recuperators
 F23L 17/00
Inducing draught
 F23L 17/02
·  Tops for chimneys or ventilating shafts; Terminals for flues
 F23L 17/04
·  ·  Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet
 F23L 17/06
·  ·  branched; T-headed
 F23L 17/08
·  ·  with coaxial cones or louvres
 F23L 17/10
·  ·  wherein the top moves as a whole
 F23L 17/12
·  ·  Devices for fastening the top or terminal to chimney, shaft, or flue
 F23L 17/14
·  ·  Draining devices
 F23L 17/16
·  Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire