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.

 F23L
AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUSTIBLE LIQUID OR GAS (air-supply arrangements for combustion apparatus using fluent fuel, e.g. fluidised bed combustion apparatus, F23C; dampers or throat restrictors for open fire-places F24; air inlet valves for open fire fronts F24)
 F23L
Subclass index
AIR SUPPLY
Passages for: primary air; secondary air 1/00; 9/00
Valves or dampers
construction 13/00
arrangements: before the fire; after the fire 3/00; 11/00
Blast-producing apparatus before the fire; heating of air for combustion 5/00; 15/00
SUPPLYING NON-COMBUSTIBLE LIQUIDS OR GASES, OTHER THAN AIR, TO THE FIRE 7/00
DRAUGHT-INDUCING 17/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS 99/00
P:80 F23L 1/00
Passages or apertures for delivering primary air for combustion
P:40 F23L 3/00
Arrangements of valves or dampers before the fire
P:20 F23L 5/00
Blast-producing apparatus before the fire
P:0 F23L 7/00
Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
P:70 F23L 9/00
Passages or apertures for delivering secondary air for completing combustion of fuel
P:50 F23L 11/00
Arrangements of valves or dampers after the fire
P:60 F23L 13/00
Construction of valves or dampers for controlling air supply or draught (in general F16K)
P:10 F23L 15/00
Heating of air supplied for combustion
P:30 F23L 17/00
Inducing draught
P:90 F23L 99/00
Subject matter not provided for in other groups of this subclass  [8]