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
 F23L 1/02
·  by discharging the air below the fire
P:40 F23L 3/00
Arrangements of valves or dampers before the fire
P:20 F23L 5/00
Blast-producing apparatus before the fire
 F23L 5/02
·  Arrangements of fans or blowers (fans or blowers per se F04)
 F23L 5/04
·  by induction of air for combustion, e.g. using steam jet
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
 F23L 9/02
·  by discharging the air above the fire
 F23L 9/04
·  by discharging the air beyond the fire, i.e. nearer the smoke outlet
 F23L 9/06
·  by discharging the air into the fire bed
P:50 F23L 11/00
Arrangements of valves or dampers after the fire
 F23L 11/02
·  for reducing draught by admission of air to flues
P:60 F23L 13/00
Construction of valves or dampers for controlling air supply or draught (in general F16K)
 F23L 13/02
·  pivoted about a single axis but having no other movement (formed as linked slats each pivoted about an axis F23L 13/08)
 F23L 13/04
·  ·  with axis perpendicular to face
 F23L 13/06
·  slidable only
 F23L 13/08
·  operating as a roller blind; operating as a venetian blind
 F23L 13/10
·  having a compound movement involving both sliding and pivoting
P:10 F23L 15/00
Heating of air supplied for combustion
 F23L 15/02
·  Arrangements of regenerators
 F23L 15/04
·  Arrangements of recuperators
P:30 F23L 17/00
Inducing draught
 F23L 17/02
·  Tops for chimneys or ventilating shafts; Terminals for flues
 F23L 17/04
·  ·  Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet
 F23L 17/06
·  ·  branched; T-headed
 F23L 17/08
·  ·  with coaxial cones or louvres
 F23L 17/10
·  ·  wherein the top moves as a whole
 F23L 17/12
·  ·  Devices for fastening the top or terminal to chimney, shaft, or flue
 F23L 17/14
·  ·  Draining devices
 F23L 17/16
·  Induction apparatus, e.g. steam jet, acting on combustion products beyond the fire
P:90 F23L 99/00
Subject matter not provided for in other groups of this subclass  [8]