|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

LIGHTING AND HEATING

|  | F23 |
COMBUSTION APPARATUS; COMBUSTION PROCESSES

|  | F23 |
Note(s) In this class, the following terms 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 provided for in Section C or in sub-class Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...B01D; composition of fuels Fulltext... Hierarchy... Expanded...C10)

|  | F23J |
Note(s) This sub-class includes the cleaning of external surfaces of water tubes of boilers.

|  | F23J 1/00 |
Removing ash, clinker, or slag from combustion chamber

|  | 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 Fulltext... Hierarchy... Expanded...F23H)

|  | 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 Fulltext... Hierarchy... Expanded...B08B)

|  | F23J 3/04 |
· | Traps

|  | F23J 3/06 |
· | Systems for accumulating residues from different parts of furnace plant

|  | F23J 5/00 |
Arrangements for consuming smoke or noxious fumes within the furnace (arrangement for burning uncombusted material from primary combustion Fulltext... Hierarchy... Expanded...F23B 5/00, Fulltext... Hierarchy... Expanded...F23C 9/00)

|  | F23J 5/02 |
· | Returning combustion products to fire

|  | F23J 5/04 |
· | Separate secondary combustion chambers (using additional fuel Fulltext... Hierarchy... Expanded...F23J 5/06, Fulltext... Hierarchy... Expanded...F23J 5/08)

|  | F23J 5/06 |
· | with auxiliary fluent-fuel burners

|  | F23J 5/08 |
· | with supplementary solid-fuel fires

|  | F23J 5/10 |
· | using catalytic action

|  | F23J 7/00 |
Arrangement of devices for supplying chemicals to fire (supplying chemicals to fire Fulltext... Hierarchy... Expanded...C10L)

|  | F23J 9/00 |
Preventing premature solidification of molten combustion residues

|  | F23J 11/00 |
Devices for conducting smoke or fumes, e.g. flues (heat insulation therefor Fulltext... Hierarchy... Expanded...E04B 1/94; chimneys per se Fulltext... Hierarchy... Expanded...E04H 12/28)

|  | 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

|  | F23J 13/00 |
Fittings for chimneys or flues (staying, stiffening Fulltext... Hierarchy... Expanded...E04H; means for facilitating climbing Fulltext... Hierarchy... Expanded...E06C; draught-inducing apparatus associated with chimneys or flues Fulltext... Hierarchy... Expanded...F23L)

|  | F23J 13/02 |
· | Linings; Jackets; Casings

|  | F23J 13/04 |
· | Joints; Connections (pipe joints in general Fulltext... Hierarchy... Expanded...F16L)

|  | F23J 13/06 |
· | Mouths; Inlet holes

|  | F23J 13/08 |
· | Doors or covers specially adapted for smoke-boxes, flues, or chimneys (in general Fulltext... Hierarchy... Expanded...E06B)

|  | F23J 15/00 |
Arrangements of devices for treating smoke or fumes (treating smoke or fumes, see the relevant class for the treatment, e.g. Fulltext... Hierarchy... Expanded...B01D 53/00)