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.

 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)

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

 F23J 1/00
Removing ash, clinker, or slag from combustion chamber
 F23J 1/02
·  Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyers, by employing suction devices
 F23J 1/04
·  Hand tools, e.g. rakes, prickers, tongs
 F23J 1/06
·  Mechanically-operated devices, e.g. clinker pushers (forming part of the grate F23H)
 F23J 1/08
·  Liquid slag removal  [3]
 F23J 3/00
Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
 F23J 3/02
·  Cleaning furnace tubes; Cleaning flues or chimneys (by means which do not differ materially from the cleaning of any other tube once the fire is out B08B)
 F23J 3/04
·  Traps
 F23J 3/06
·  Systems for accumulating residues from different parts of furnace plant
 F23J 5/00
( transferred to F23B 5/00, F23C 9/00, F23G 7/06 )
 F23J 7/00
Arrangement of devices for supplying chemicals to fire (supplying chemicals to fire C10L)
 F23J 9/00
Preventing premature solidification of molten combustion residues
 F23J 11/00
Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys per se E04H 12/28)
 F23J 11/02
·  for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages
 F23J 11/04
·  in locomotives; in road vehicles; in ships
 F23J 11/06
·  ·  for conducting smoke horizontally
 F23J 11/08
·  for portable apparatus
 F23J 11/10
·  for tents; for log huts; for other inflammable structures
 F23J 11/12
·  Smoke conduit systems for factories or large buildings
 F23J 13/00
Fittings for chimneys or flues (staying, stiffening E04H; means for facilitating climbing E06C; draught-inducing apparatus associated with chimneys or flues F23L)
 F23J 13/02
·  Linings; Jackets; Casings
 F23J 13/04
·  Joints; Connections (pipe joints in general F16L)
 F23J 13/06
·  Mouths; Inlet holes
 F23J 13/08
·  Doors or covers specially adapted for smoke-boxes, flues, or chimneys (in general E06B)
 F23J 15/00
Arrangements of devices for treating smoke or fumes (such devices per se, methods for treating smoke or fumes, see the relevant sub-classes for the treatment, e.g. B01D 53/00)