| IPC 7 English version |
| F23L-F23L01716 |
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| SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
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| F 23 | COMBUSTION APPARATUS; COMBUSTION PROCESSES |
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| F 23 L | AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS (air-supply arrangements for combustion apparatus using fluent fuel, e.g. fluidised bed combustion apparatus, F23C; dampers or throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24) |
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| Subclass Index |
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| AIR SUPPLY |
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| Passages for: primary air; secondary air |
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| Valves or dampers |
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| construction |
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| arrangements: before the fire; after the fire |
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| Blast-producing apparatus before the fire; heating of air for combustion |
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| SUPPLYING NON-COMBUSTIBLE LIQUIDS OR GASES, OTHER THAN AIR, TO THE FIRE |
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| DRAUGHT-INDUCING |
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1/ | 00 | Passages or apertures for delivering primary air for combustion |
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1/ | 02 | . | by discharging the air below the fire |
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3/ | 00 | Arrangements of valves or dampers before the fire |
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5/ | 00 | Blast-producing apparatus before the fire |
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5/ | 02 | . | Arrangements of fans or blowers (fans or blowers per se F04) |
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5/ | 04 | . | by induction of air for combustion, e.g. using steam jet |
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7/ | 00 | Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam |
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9/ | 00 | Passages or apertures for delivering secondary air for completing combustion of fuel |
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9/ | 02 | . | by discharging the air above the fire |
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9/ | 04 | . | by discharging the air beyond the fire, i.e. nearer the smoke outlet |
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9/ | 06 | . | by discharging the air into the fire bed |
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11/ | 00 | Arrangements of valves or dampers after the fire |
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11/ | 02 | . | for reducing draught by admission of air to flues |
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13/ | 00 | Construction of valves or dampers for controlling air supply or draught (in general F16K) |
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13/ | 02 | . | pivoted about a single axis but having no other movement (formed as linked slats each pivoted about an axis F23L 13/08) |
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13/ | 04 | . | . | with axis perpendicular to face |
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13/ | 06 | . | slidable only |
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13/ | 08 | . | operating as a roller blind; operating as a venetian blind |
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13/ | 10 | . | having a compound movement involving both sliding and pivoting |
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15/ | 00 | Heating of air supplied for combustion |
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15/ | 02 | . | Arrangements of regenerators |
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15/ | 04 | . | Arrangements of recuperators |
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17/ | 00 | Inducing draught |
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17/ | 02 | . | Tops for chimneys or ventilating shafts; Terminals for flues |
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17/ | 04 | . | . | Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet |
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17/ | 06 | . | . | branched; T-headed |
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17/ | 08 | . | . | with coaxial cones or louvres |
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17/ | 10 | . | . | wherein the top moves as a whole |
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17/ | 12 | . | . | Devices for fastening the top or terminal to chimney, shaft, or flue |
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17/ | 14 | . | . | Draining devices |
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17/ | 16 | . | Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire |
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