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.

 F23J
REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (precipitating dust from flue gases B01D; composition of fuels C10; combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G 7/06)
 F23J

Note(s)

  1. This subclass covers also the cleaning of surfaces of furnace tubes, flame tubes, water tubes, flues or the like of boilers, heat-exchange or heat-transfer conduits, which surfaces are contaminated by combustion products or combustion residues.
  2. This subclass does not cover the cleaning of surfaces of boilers, heat exchange or heat-transfer conduits contaminated by other than combustion products or combustion residues, which is covered by subclass F28G.
 F23J
Subclass index
REMOVAL OF SOLID COMBUSTION PRODUCTS OR RESIDUES
From combustion chamber 1/00
From places beyond the fire 3/00
TREATMENT OF COMBUSTION PRODUCTS OR RESIDUES
Supply of chemicals; preventing solidification; Treating smoke or fumes 7/00; 9/00; 15/00
FLUES, FITTINGS FOR CHIMNEYS OR FLUES 11/00, 13/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS 99/00
P:40 F23J 1/00
Removing ash, clinker, or slag from combustion chambers (devices for removal of material from the bed of fluidised bed combustion apparatus F23C 10/24)
 F23J 1/02
·  Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyers, by employing suction devices
 F23J 1/04
·  Hand tools, e.g. rakes, prickers, tongs
 F23J 1/06
·  Mechanically-operated devices, e.g. clinker pushers (forming part of the grate F23H)
 F23J 1/08
·  Liquid slag removal  [3]
P:30 F23J 3/00
Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
 F23J 3/02
·  Cleaning furnace tubes; Cleaning flues or chimneys (by means which do not differ materially from the cleaning of any other tube once the fire is out B08B)
 F23J 3/04
·  Traps
 F23J 3/06
·  Systems for accumulating residues from different parts of furnace plant
P:10 F23J 7/00
Arrangement of devices for supplying chemicals to fire (supplying chemicals to fire C10L)
P:0 F23J 9/00
Preventing premature solidification of molten combustion residues
P:50 F23J 11/00
Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor E04B 1/94; chimneys E04H 12/28; removing cooking fumes from domestic stoves or ranges F24C 15/20)  [5]
 F23J 11/02
·  for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages
 F23J 11/04
·  in locomotives; in road vehicles; in ships
 F23J 11/06
·  ·  for conducting smoke horizontally
 F23J 11/08
·  for portable apparatus
 F23J 11/10
·  for tents; for log huts; for other inflammable structures
 F23J 11/12
·  Smoke conduit systems for factories or large buildings
P:60 F23J 13/00
Fittings for chimneys or flues (staying, stiffening E04H; means for facilitating climbing E06C; draught-inducing apparatus associated with chimneys or flues F23L)
 F23J 13/02
·  Linings; Jackets; Casings
 F23J 13/04
·  Joints; Connections (pipe joints in general F16L)
 F23J 13/06
·  Mouths; Inlet holes
 F23J 13/08
·  Doors or covers specially adapted for smoke-boxes, flues, or chimneys (in general E06B)
P:20 F23J 15/00
Arrangements of devices for treating smoke or fumes (such devices per se, methods for treating smoke or fumes, see the relevant places for the treatment, e.g. B01D 53/00)
 F23J 15/02
·  of purifiers, e.g. for removing noxious material (traps for solid residues F23J 3/04)  [6]
 F23J 15/04
·  ·  using washing fluids  [6]
 F23J 15/06
·  of coolers  [6]
 F23J 15/08
·  of heaters  [6]
P:70 F23J 99/00
Subject matter not provided for in other groups of this subclass  [8]