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CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
Definition statement
This subclass 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 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, 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
References relevant to classification in this group
This 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 (construction or support of tube walls for steam boilers F22B)
References relevant to classification in this group
This 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
References relevant to classification in this group
This group does not cover:

Doors in general

Doors for flues or smoke-boxes

Baffles or deflectors for air or combustion products (structurally associated with burners F23D); Flame shields
References relevant to classification in this group
This 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

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Last Modified: 10/11/2013