Skip over navigation
Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
Collapse
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)
Collapse
Passages or apertures for delivering primary air for combustion
F23L 1/02
.
by discharging the air below the fire
Arrangements of valves or dampers before the fire
Collapse
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
Collapse
Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
Collapse
F23L 7/002
.
{
Supplying water
}
F23L 7/005
. .
{
Evaporated water; Steam
}
F23L 7/007
.
{
Supplying oxygen or oxygen-enriched air
}
Collapse
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
Collapse
Arrangements of valves or dampers after the fire
F23L 11/005
.
{
for closing the flue during interruption of burner function
}
F23L 11/02
.
for reducing draught by admission of air to flues
Collapse
Construction of valves or dampers for controlling air supply or draught (in general F16K)
Collapse
.
pivoted about a single axis but having not 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
Collapse
Heating of air supplied for combustion
F23L 15/02
.
Arrangements of regenerators
Collapse
F23L 15/04
.
Arrangements of recuperators
F23L 15/045
. .
{
using intermediate heat-transfer fluids
}
Collapse
Inducing draught
F23L 17/005
.
{
using fans
}
Collapse
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 co-axial 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
Subject matter not provided for in other groups of this subclass
Collapse
F23L 2700/00
Installations for increasing draught in chimneys; Specific draught control devices for locomotives
F23L 2700/001
.
Installations for increasing draught in chimneys
F23L 2700/002
.
Specific draught control devices for locomotives
Collapse
F23L 2900/00
Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
F23L 2900/00001
.
Treating oxidant before combustion, e.g. by adding a catalyst
F23L 2900/05021
.
Gas turbine driven blowers for supplying combustion air or oxidant, i.e. turbochargers
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
F23L 2900/07002
.
Injecting inert gas, other than steam or evaporated water, into the combustion chambers
F23L 2900/07003
.
Controlling the inert gas supply
F23L 2900/07004
.
Injecting liquid or solid materials releasing oxygen, e.g. perchlorate, nitrate, peroxide, and chlorate compounds, or appropriate mixtures thereof
F23L 2900/07005
.
Injecting pure oxygen or oxygen enriched air
F23L 2900/07006
.
Control of the oxygen supply
F23L 2900/07007
.
using specific ranges of oxygen percentage
F23L 2900/07008
.
Injection of water into the combustion chamber
F23L 2900/07009
.
Injection of steam into the combustion chamber
F23L 2900/15021
.
using regenerative heat exchanger bodies with different layers of material
F23L 2900/15022
.
using pre-purging regenerator beds
F23L 2900/15041
.
Preheating combustion air by recuperating heat from ashes
F23L 2900/15042
.
Preheating combustion air by auxiliary combustion, e.g. in a turbine
F23L 2900/15043
.
Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
F23L 2900/15044
.
Preheating combustion air by heat recovery means using solar or other clean energy
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013