F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
 F01 - 
F04
Subsection index
MACHINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
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
METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL (for combustion of fuels that are solid at room temperatures, but burned in melted form, e.g. candle wax, C11C 5/00, F23C, F23D; using solid fuel suspended in air F23C, F23D 1/00; using solid fuel suspended in liquids F23C, F23D 11/00; using solid fuel and fluent fuel simultaneously or alternately F23C, F23D 17/00)
 F23B

Note(s)

  1. This subclass only covers combustion wherein the main body of fuel is either essentially stationary during combustion or mechanically transported, as opposed to pneumatically transported or suspended in air, during combustion. [8]
  2. In this subclass, the first place priority rule is applied, i.e. at each hierarchical level, classification is made in the first appropriate place. [8]
  3. In this subclass, methods are classified in the groups that cover the apparatus used. Methods that are not related to a particular type of apparatus are classified in group F23B 90/00[8]
 F23B
Subclass index
COMBUSTION APPARATUS
Combinations of two or more combustion chambers 10/00
Specially adapted for portability or transportability 20/00
Functional types 30/00 - 60/00
Returning solid combustion residues to the combustion chamber 70/00
Creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel 80/00
COMBUSTION METHODS NOT RELATED TO A PARTICULAR TYPE OF APPARATUS 90/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS 99/00
P:10 F23B 10/00
Combustion apparatus characterised by the combination of two or more combustion chambers  [8]
P:20 F23B 20/00
Combustion apparatus specially adapted for portability or transportability  [8]
P:30 F23B 30/00
Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber  [8]
 F23B 30/02
·  with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts  [8]
P:40 F23B 40/00
Combustion apparatus with driven means for feeding fuel into the combustion chamber  [8]
 F23B 40/02
·  the fuel being fed by scattering over the fuel-supporting surface  [8]
 F23B 40/04
·  the fuel being fed from below through an opening in the fuel-supporting surface  [8]
 F23B 40/06
·  the fuel being fed along the fuel-supporting surface  [8]
P:50 F23B 50/00
Combustion apparatus in which the fuel is fed into or through the combustion zone by gravity, e.g. from a fuel storage situated above the combustion zone  [8]
 F23B 50/02
·  the fuel forming a column, stack or thick layer with the combustion zone at its bottom  [8]
 F23B 50/12
·  the fuel being fed to the combustion zone by free fall or by sliding along inclined surfaces, e.g. from a conveyer terminating above the fuel bed  [8]
P:60 F23B 60/00
Combustion apparatus in which the fuel burns essentially without moving  [8]
 F23B 60/02
·  with combustion air supplied through a grate  [8]
P:70 F23B 70/00
Combustion apparatus characterised by means for returning solid combustion residues to the combustion chamber  [8]
P:80 F23B 80/00
Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel  [8]
 F23B 80/02
·  by means for returning flue gases to the combustion chamber or to the combustion zone  [8]
 F23B 80/04
·  by means for guiding the flow of flue gases, e.g. baffles  [8]
P:90 F23B 90/00
Combustion methods not related to a particular type of apparatus  [8]
P:100 F23B 99/00
Subject matter not provided for in other groups of this subclass  [8]