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

Note(s)

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

  • "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 covered by section C or by subclass F24J;
  • "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;
  • "burner" means a device by which fluent fuel is passed to a combustion space where it burns to produce a self-supporting flame;
  • "air" means a mixture of gases containing free oxygen and able to promote or support combustion.

 F23B
COMBUSTION APPARATUS USING ONLY SOLID FUEL (for lump and another kind of fuel simultaneously or alternatively F23C 1/00; combustion in fluidised beds F23C 11/02; burning of low-grade fuel F23G; grates F23H; feeding solid fuel to combustion apparatus F23K; constructional details of combustion chambers not otherwise provided for F23M; domestic apparatus F24; central heating boilers F24D; package boilers F24H)
 F23B

Note(s)

This subclass covers only the combustion of lump fuel, or of pulverulent or granulated fuel if no use is made of its fluent nature.


 F23C
COMBUSTION APPARATUS USING FLUENT FUEL (combustion apparatus for solid fuel only F23B; burners F23D; constructional details of combustion chambers not otherwise provided for F23M; combustion chambers for generating combustion products of high pressure or high velocity F23R)

 F23D
BURNERS (generating combustion products of high pressure or high velocity F23R)

 F23G
CREMATION FURNACES; CONSUMING WASTE BY COMBUSTION
 F23G

Note(s)

This subclass covers also the burning of low-grade fuel of solid, liquid, or gaseous nature.


 F23H
GRATES; CLEANING OR RAKING GRATES

 F23J
REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (precipitating dust from flue gases B01D; composition of fuels C10; combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G 7/06)
 F23J

Note(s)

  1. This subclass covers also the cleaning of surfaces of furnace tubes, flame tubes, water tubes, flues or the like of boilers, heat-exchange or heat-transfer conduits, which surfaces are contaminated by combustion products or combustion residues.
  2. This subclass does not cover the cleaning of surfaces of boilers, heat exchange or heat-transfer conduits contaminated by other than combustion products or combustion residues, which is covered by subclass F28G.

 F23K
FEEDING FUEL TO COMBUSTION APPARATUS (regulating or controlling combustion F23N)

 F23L
AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS (air-supply arrangements for fluent fuels F23C; dampers or throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24)

 F23M
CONSTRUCTIONAL DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR (construction or support of tube walls for steam boilers F22B; generating combustion products of high pressure or high velocity F23R)

 F23N
REGULATING OR CONTROLLING COMBUSTION (regulating in general G05)

 F23Q
IGNITION (devices for igniting matches A24F; explosive or thermic compositions C06B; chemical igniters C06C; devices or installations peculiar to internal-combustion engines, except glowing plugs, F02P); EXTINGUISHING DEVICES

 F23R
GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (chemical aspects of gas production C06D 5/00; gas-turbine plants characterised by the arrangement of the combustion chamber in the plant F02C 3/14; arrangement of afterburners in jet-propulsion plants F02K 3/10; combustion chambers of rocket engine plants F02K 9/00; using such products for specific purposes, see the relevant classes for the purposes)