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; fluidised bed combustion apparatus F23C 10/00; 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.

 F23B
Subclass index
APPARATUS
Structural features 1/00
Portable or removable 3/00
Arrangements for burning uncombusted material 5/00
Other apparatus 7/00
COMBUSTION TECHNIQUES 7/00
 F23B 1/00
Combustion apparatus using only lump fuel
 F23B 1/02
·  for indirect heating of a medium in a vessel, e.g. for boiling water (steam generation F22)
 F23B 1/04
·  ·  External furnaces, i.e. with furnace in front of the vessel
 F23B 1/06
·  ·  ·  for heating water-tube boilers, e.g. Tenbrink flue furnaces
 F23B 1/08
·  ·  Internal furnaces, i.e. with furnaces inside the vessel
 F23B 1/10
·  ·  ·  for heating locomotive boilers
 F23B 1/12
·  ·  with a plurality of combustion chambers
 F23B 1/14
·  Combined gas-producer and boiler, e.g. returning gases to flame (destructive distillation C10B)
 F23B 1/16
·  the combustion apparatus being modified according to the form of grate or other fuel support
 F23B 1/18
·  ·  using inclined grate
 F23B 1/20
·  ·  using step-type grate
 F23B 1/22
·  ·  using travelling grate
 F23B 1/24
·  ·  using rotating grate
 F23B 1/26
·  ·  using imperforate fuel supports
 F23B 1/28
·  ·  using ridge-type grate, e.g. for combustion of peat, sawdust, or pulverulent fuel
 F23B 1/30
·  characterised by the form of combustion chamber
 F23B 1/32
·  ·  rotating
 F23B 1/34
·  ·  annular
 F23B 1/36
·  ·  shaft type
 F23B 1/38
·  ·  for combustion of peat, sawdust, or pulverulent fuel on a grate or other fuel support
 F23B 3/00
Combustion apparatus which is portable or removable with respect to the boiler or other apparatus which is heated
 F23B 5/00
Combustion apparatus with arrangements for burning uncombusted material from primary combustion (wherein the primary combustion may be of pulverulent fuel F23C 9/00)
 F23B 5/02
·  in main combustion chamber
 F23B 5/04
·  in separate combustion chamber; on separate grate
 F23B 7/00
Combustion techniques; Other solid-fuel combustion apparatus