CPC Definition - Subclass F23K
This place covers:
General arrangements for preparing and supplying fuel to a combustion apparatus, including accessories and peripheral devices such as for example pumps, pulverisers, pre-heaters or vaporisers, arrangements for adding chemicals to fuels, subdivided according to the type of the fuel which is burned.
Details of devices specially adapted to feed or prepare fuels.
This place does not cover:
Fuel feeders specially adapted for fluidised bed combustion apparatus |
Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:
Fuel feeders incorporated into combustion apparatus for burning solid fuel | |
Fuel feeders specially adapted for feeding waste to incinerating apparatus |
Attention is drawn to the following places, which may be of interest for search:
In this subclass, the first place priority rule is applied, i.e. at each hierarchical level, classification is made in the first appropriate place.
When classifying in this subclass, add codes F23K 2200/00-F23K 2400/201;
In this place, 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 |
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 |
In patent documents, the following words/expressions are often used with the meaning indicated:
"boiler" | "combustion apparatus". |
"burner" | "combustion apparatus". |
This place covers:
Feeding devices wherein the fuel is fed by scattering it over the fuel-supporting surface.
Attention is drawn to the following places, which may be of interest for search:
Pumps in General | |
Safety arrangements for combustion chambers |
This place does not cover:
Cleaning or purging devices, e.g. filters |
Attention is drawn to the following places, which may be of interest for search:
Safety arrangements for combustion chambers |