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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)
Definition statement
This subclass/group covers:
  • Constructional details of combustion chambers, including accessories and peripheral devices such as for example lining, cooling, baffles for creating special flow path, doors, heat storage means independently of the type of the fuel which is burned.
  • Safety measures.
  • Noise reduction means.
References relevant to classification in this subclass
This subclass/group does not cover:
Construction or support of tube walls for steam boilers
Combustion chambers and related components specially adapted for generating combustion products of high pressure or high velocity
Informative references
Attention is drawn to the following places, which may be of interest for search:
Details of heat-treatment chambers
Special rules of classification within this subclass

When classifying in this subclass, add also codes F23M 2900/05001-F23M 2900/13004.

Codes F23M 2700/00-F23M 2700/008 are not used.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Air
a mixture of gases containing free oxygen and able to promote or support combustion
Primary air
air supplied to the burning fuel in order to liberate combustible gases
Secondary air
air supplied to the combustible gases liberated by the primary air in order to complete their combustion. The term "secondary air" covers "tertiary air" etc.
Ash
means any solid combustion residues, for example remaining in the fuel bed or suspended in the flue gases
Burner
a device by which fluid fuel or solid fuel suspended in air is passed to a combustion space where it burns to produce a self-supporting flame
Combustion
means the direct combination of oxygen gas, e.g. in air, and a burnable substance
Combustion chamber
a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame
Combustion zone
the part of the apparatus where the reaction takes place between air and fuel
Firebridge
a low wall separating the fuel bed from adjacent flue gas passages in apparatus for combustion of solid fuel, for example in reverberatory furnaces or fire-tube boilers
Flue gases
any gaseous products of combustion
Grate
a perforated surface, e.g. a grid, which supports or delimits a bed of burning fuel and serves to supply primary air
Synonyms and Keywords

In patent documents the expression/word "boiler" is often used with the meaning "combustion apparatus".

In patent documents the expression/word "burner" is often used with the meaning "combustion apparatus".

Firebridges (baffles non confining the fire F23M 9/06)
References relevant to classification in this group
This subclass/group does not cover:
Baffles non confining the fire
Informative references
Attention is drawn to the following places, which may be of interest for search:
Firebridges modified for circulation of fluids, e.g. air, steam, water
Casings, Linings, Walls (casings, linings, or walls of heat-treatment chambers of ovens, kilns, or retorts F27D)
References relevant to classification in this group
This subclass/group does not cover:
Casings, linings, or walls of heat-treatment chambers of ovens, kilns, or retorts
Informative references
Attention is drawn to the following places, which may be of interest for search:
Ceramic materials
Casings characterised by the shape of the bricks or blocks used
Support for linings
Doors specially adapted for combustion chambers (in general E06B; for flues or smoke-boxes F23J 13/08)
References relevant to classification in this group
This subclass/group does not cover:
Doors in general
Doors for flues or smoke-boxes
Baffles or deflectors for air or combustion products; Flame shields
References relevant to classification in this group
This subclass/group does not cover:
Controlling combustion using gas detectors
Safety arrangements obtained by means of controlling combustion
Alarm systems
Informative references
Attention is drawn to the following places, which may be of interest for search:
Interconnection of water-tubes in boilers for fluid flow
Safety arrangements (by controlling combustion F23N 5/24)
Subject matter not provided for in other groups of this subclass, [N: e.g. heat storage from flames]
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Last Modified: 10/11/2013