|  | 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 fluid | F01C
liquid only | F04C
reciprocating piston or other |
liquid and elastic fluid or elastic fluid | F01B
liquid only | F04B
non-positive displacement |
liquid and elastic fluid or elastic fluid | F01D
liquid only | F03B
ENGINES |
positive displacement |
rotary or oscillating piston |
liquid and elastic fluid or elastic fluid | F01C
liquid only | F03C
reciprocating piston or other |
liquid and elastic fluid or elastic fluid | F01B
liquid only | F03C
non-positive displacement |
liquid and elastic fluid or elastic fluid | F01D
liquid only | F03B
PUMPS |
positive displacement |
rotary or oscillating piston | F04C
reciprocating piston or other | F04B
non-positive displacement | F04D

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 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.

|  | F23K |
FEEDING FUEL TO COMBUSTION APPARATUS (fuel feeders specially adapted for fluidised bed combustion apparatus Fulltext... Hierarchy... Expanded...F23C 10/22; regulating or controlling combustion Fulltext... Hierarchy... Expanded...F23N)

P:0 |  | F23K 1/00 |
Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus (filtration Fulltext... Hierarchy... Expanded...B01D; mixing Fulltext... Hierarchy... Expanded...B01F; pulverising Fulltext... Hierarchy... Expanded...B02C; drying Fulltext... Hierarchy... Expanded...F26B)

|  | F23K 1/02 |
· | Mixing solid fuel with a liquid, e.g. preparing slurries

|  | F23K 1/04 |
· | Heating fuel prior to delivery to combustion apparatus

P:10 |  | F23K 3/00 |
Feeding or distributing of lump or pulverulent fuel to combustion apparatus (conveying in general Fulltext... Hierarchy... Expanded...B65G)

|  | F23K 3/02 |
· | Pneumatic feeding arrangements, i.e. by air blast

|  | F23K 3/04 |
· | for locomotive boiler furnaces

|  | F23K 3/06 |
· | for shaft-type furnaces

|  | F23K 3/08 |
· | for furnaces having movable grate bars

|  | F23K 3/10 |
· | Under-feed arrangements

|  | F23K 3/12 |
· · | feeding by piston

|  | F23K 3/14 |
· · | feeding by screw

|  | F23K 3/16 |
· | Over-feed arrangements

|  | F23K 3/18 |
· · | Spreader stokers

|  | F23K 3/20 |
· · · | with moving hoppers

|  | F23K 3/22 |
· | Controlling thickness of fuel bed

P:20 |  | F23K 5/00 |
Feeding or distributing other fuel to combustion apparatus

|  | F23K 5/02 |
· | Liquid fuel [5]

|  | F23K 5/04 |
· · | Feeding or distributing systems using pumps (Fulltext... Hierarchy... Expanded...F23K 5/06 takes precedence) [5]

|  | F23K 5/06 |
· · | from a central source to a plurality of burners [5]

|  | F23K 5/08 |
· · | Preparation of fuel [5]

|  | F23K 5/10 |
· · · | Mixing with other fluids [5]

|  | F23K 5/12 |
· · · · | Preparing emulsions (burners spraying an emulsion of water and fuel into the combustion space Fulltext... Hierarchy... Expanded...F23D 11/16) [5]

|  | F23K 5/14 |
· · | Details thereof [5]

|  | F23K 5/16 |
· · · | Safety devices (Fulltext... Hierarchy... Expanded...F23K 5/18 takes precedence; safety arrangements for combustion chambers Fulltext... Hierarchy... Expanded...F23M 11/00) [5]

|  | F23K 5/18 |
· · · | Cleaning or purging devices, e.g. filters [5]

|  | F23K 5/20 |
· · · | Preheating devices (in burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space Fulltext... Hierarchy... Expanded...F23D 11/44) [5]

|  | F23K 5/22 |
· · · | Vaporising devices (in burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space Fulltext... Hierarchy... Expanded...F23D 11/44) [5]