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CPC
COOPERATIVE PATENT CLASSIFICATION
F23L
SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL  ({air-supply arrangements for fluent fuels F23C;} firebridges with means for feeding air or steam F23M 3/04; baffles or shields with air supply passages F23M 9/04); VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS {(dampers and throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24)}; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES [2018-08]
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
F23L 1/00
Passages or apertures for delivering primary air for combustion  (baffles or deflectors in air inlets F23M 9/02) [2021-08]
F23L 1/02
.
by discharging the air below the fire [2013-01]
F23L 3/00
Arrangements of valves or dampers before the fire [2013-01]
F23L 5/00
Blast-producing apparatus before the fire [2013-01]
F23L 5/02
.
Arrangements of fans or blowers [2018-08]
F23L 5/04
.
by induction of air for combustion, e.g. using steam jet [2013-01]
F23L 7/00
Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam [2013-01]
F23L 7/002
.
{Supplying water} [2013-01]
F23L 7/005
. .
{Evaporated water; Steam} [2013-01]
F23L 7/007
.
{Supplying oxygen or oxygen-enriched air} [2013-01]
F23L 9/00
Passages or apertures for delivering secondary air for completing combustion of fuel  (baffles or deflectors in air inlets F23M 9/02) [2021-08]
F23L 9/02
.
by discharging the air above the fire [2013-01]
F23L 9/04
.
by discharging the air beyond the fire, i.e. nearer the smoke outlet [2013-01]
F23L 9/06
.
by discharging the air into the fire bed [2013-01]
F23L 11/00
Arrangements of valves or dampers after the fire [2013-01]
F23L 11/005
.
{for closing the flue during interruption of burner function} [2013-01]
F23L 11/02
.
for reducing draught by admission of air to flues [2013-01]
F23L 13/00
Construction of valves or dampers for controlling air supply or draught [2018-08]
F23L 13/02
.
pivoted about a single axis but having not other movement (formed as linked slats each pivoted about an axis F23L 13/08) [2013-01]
F23L 13/04
. .
with axis perpendicular to face [2013-01]
F23L 13/06
.
slidable only [2013-01]
F23L 13/08
.
operating as a roller blind; operating as a venetian blind [2013-01]
F23L 13/10
.
having a compound movement involving both sliding and pivoting [2013-01]
F23L 15/00
Heating of air supplied for combustion [2013-01]
F23L 15/02
.
Arrangements of regenerators [2013-01]
F23L 15/04
.
Arrangements of recuperators [2013-01]
F23L 15/045
. .
{using intermediate heat-transfer fluids} [2013-01]
F23L 17/00
Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues [2018-08]
F23L 17/005
.
{using fans} [2013-01]
F23L 17/02
.
Tops for chimneys or ventilating shafts; Terminals for flues [2013-01]
F23L 17/04
. .
Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet [2013-01]
F23L 17/06
. .
branched; T-headed [2013-01]
F23L 17/08
. .
with coaxial cones or louvres [2017-08]
F23L 17/10
. .
wherein the top moves as a whole [2013-01]
F23L 17/12
. .
Devices for fastening the top or terminal to chimney, shaft, or flue [2013-01]
F23L 17/14
. .
Draining devices [2013-01]
F23L 17/16
.
Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire [2013-01]
F23L 99/00
Subject matter not provided for in other groups of this subclass [2013-01]
F23L 2700/00
Installations for increasing draught in chimneys; Specific draught control devices for locomotives [2013-01]
F23L 2700/001
.
Installations for increasing draught in chimneys [2013-01]
F23L 2700/002
.
Specific draught control devices for locomotives [2013-01]
F23L 2900/00
Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber [2013-01]
F23L 2900/00001
.
Treating oxidant before combustion, e.g. by adding a catalyst [2013-01]
F23L 2900/05021
.
Gas turbine driven blowers for supplying combustion air or oxidant, i.e. turbochargers [2013-01]
F23L 2900/07001
.
Injecting synthetic air, i.e. a combustion supporting mixture made of pure oxygen and an inert gas, e.g. nitrogen or recycled fumes [2013-01]
F23L 2900/07002
.
Injecting inert gas, other than steam or evaporated water, into the combustion chambers [2013-01]
F23L 2900/07003
.
Controlling the inert gas supply [2013-01]
F23L 2900/07004
.
Injecting liquid or solid materials releasing oxygen, e.g. perchlorate, nitrate, peroxide, and chlorate compounds, or appropriate mixtures thereof [2013-01]
F23L 2900/07005
.
Injecting pure oxygen or oxygen enriched air [2013-01]
F23L 2900/07006
.
Control of the oxygen supply [2013-01]
F23L 2900/07007
.
using specific ranges of oxygen percentage [2013-01]
F23L 2900/07008
.
Injection of water into the combustion chamber [2013-01]
F23L 2900/07009
.
Injection of steam into the combustion chamber [2013-01]
F23L 2900/15021
.
using regenerative heat exchanger bodies with different layers of material [2013-01]
F23L 2900/15022
.
using pre-purging regenerator beds [2013-01]
F23L 2900/15041
.
Preheating combustion air by recuperating heat from ashes [2013-01]
F23L 2900/15042
.
Preheating combustion air by auxiliary combustion, e.g. in a turbine [2013-01]
F23L 2900/15043
.
Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices [2013-01]
F23L 2900/15044
.
Preheating combustion air by heat recovery means using solar or other clean energy [2013-01]