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.

 F23B
COMBUSTION APPARATUS USING ONLY SOLID FUEL (for lump and another kind of fuel simultaneously or alternatively F23C 1/00; combustion in fluidised beds F23D 19/00; burning of low-grade fuel F23G; grates F23H; feeding solid fuel to combustion apparatus F23K; combustion chambers and details thereof F23M; domestic apparatus F24; central heating boilers F24D; package boilers F24H)
 F23B

Note(s)

This sub-class is only concerned with 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; 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 PRODUCTS BY COMBUSTION
 F23G

Note(s)

This sub-class includes 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)
 F23J

Note(s)

This sub-class includes the cleaning of external surfaces of water tubes of boilers.


 F23K
FEEDING FUEL TO COMBUSTION APPARATUS

 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)

 F23M
COMBUSTION CHAMBERS FOR COMBUSTION APPARATUS (support of tube walls for steam boilers F22B; for generating combustion products of high pressure or high velocity F23R)

 F23N
REGULATING OR CONTROLLING COMBUSTION (regulating in general G05)

 F23Q
IGNITION (of cigarettes or tobacco A24F; compositions therefore chemical igniters C06C; devices or installations peculiar to internal-combustion engines F02P); EXTINGUISHING DEVICES

 F23R
GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY (using such products for specific purposes, see the relevant classes for the purposes; chemical aspects of gas production C06D)