|  | 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.

|  | F23H |
GRATES (inlets for fluidisation air for fluidised bed combustion apparatus Fulltext... Hierarchy... Expanded...F23C 10/20); CLEANING OR RAKING GRATES

|  | F23H |
Subclass index
GRATES |
With solid bars; with hollow bars | 1/00; 3/00
Double; inclined; revolving or rocking; travelling | 5/00; 7/00; 9/00; 11/00
Other types | 13/00
Details | 17/00
CLEANING ARRANGEMENTS FOR GRATES, MOVING FUEL ALONG GRATE | 15/00

P:50 |  | F23H 1/00 |
Grates with solid bars (double grates Fulltext... Hierarchy... Expanded...F23H 5/00)

|  | F23H 1/02 |
· | having provision for air supply or air preheating, e.g. air-supply or blast fittings which form part of the grate structure or serve as supports

|  | F23H 1/04 |
· | having a variable burning surface

|  | F23H 1/06 |
· | having bars at different levels

|  | F23H 1/08 |
· | Vertical grates

P:40 |  | F23H 3/00 |
Grates with hollow bars

|  | F23H 3/02 |
· | internally cooled

|  | F23H 3/04 |
· | externally cooled, e.g. with water, steam, or air

P:30 |  | F23H 5/00 |
Double grates

P:10 |  | F23H 7/00 |
Inclined grates (inclined travelling grates Fulltext... Hierarchy... Expanded...F23H 11/12)

|  | F23H 7/02 |
· | with fixed bars

|  | F23H 7/04 |
· · | in parallel disposition

|  | F23H 7/06 |
· | with movable bars disposed parallel to direction of fuel feeding

|  | F23H 7/08 |
· · | reciprocating along their axes

|  | F23H 7/10 |
· · | rocking about their axes

|  | F23H 7/12 |
· | with movable bars disposed transversely to direction of fuel feeding

|  | F23H 7/14 |
· · | reciprocating along their axes

|  | F23H 7/16 |
· · | rocking about their axes

|  | F23H 7/18 |
· · | reciprocating in an upward direction

P:20 |  | F23H 9/00 |
Revolving grates; Rocking grates (Fulltext... Hierarchy... Expanded...F23H 7/00 takes precedence)

|  | F23H 9/02 |
· | Revolving cylindrical grates

|  | F23H 9/04 |
· | Grates rocked as a whole

|  | F23H 9/06 |
· | the bars being rocked about axes transverse to their lengths

|  | F23H 9/08 |
· | the bars being rocked about their longitudinal axes

|  | F23H 9/10 |
· · | and modified to move fuel along the grate

|  | F23H 9/12 |
· | the bars being vertically movable in a plane

P:0 |  | F23H 11/00 |
Travelling grates

|  | F23H 11/02 |
· | with the bars disposed on transverse bearers

|  | F23H 11/04 |
· | with the bars pivoted at one side

|  | F23H 11/06 |
· | with the bars movable relatively to one another

|  | F23H 11/08 |
· | with several individually-movable grate surfaces

|  | F23H 11/10 |
· | with special provision for supply of air from below and for regulating air supply

|  | F23H 11/12 |
· | inclined travelling grates; Stepped travelling grates

|  | F23H 11/14 |
· | serving as auxiliary grates

|  | F23H 11/16 |
· | for multi-layer stoking

|  | F23H 11/18 |
· | Details

|  | F23H 11/20 |
· · | Driving means

|  | F23H 11/22 |
· · | Moving fuel along grate; Cleaning of grate

|  | F23H 11/24 |
· · | Removal of ashes; Removal of clinker

|  | F23H 11/26 |
· · · | by dumping

|  | F23H 11/28 |
· · | Replaceable burning-surface

P:60 |  | F23H 13/00 |
Grates not covered by any of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F23H 1/00-F23H 11/00

|  | F23H 13/02 |
· | Basket grates, e.g. with shaking arrangement

|  | F23H 13/04 |
· | Telescoping grates

|  | F23H 13/06 |
· | Dumping-grates

|  | F23H 13/08 |
· | Grates specially adapted for gas generators and also applicable to furnaces

P:70 |  | F23H 15/00 |
Cleaning arrangements for grates (not forming part of the grate Fulltext... Hierarchy... Expanded...F23J 1/00); Moving fuel along grate (rocking grates modified for moving fuel Fulltext... Hierarchy... Expanded...F23H 9/10; for travelling grates Fulltext... Hierarchy... Expanded...F23H 11/22)

P:80 |  | F23H 17/00 |
Details of grates

|  | F23H 17/02 |
· | End fittings on bars

|  | F23H 17/04 |
· · | of travelling grates

|  | F23H 17/06 |
· | Provision for vertical adjustment of grate

|  | F23H 17/08 |
· | Bearers; Frames; Spacers; Supports

|  | F23H 17/10 |
· · | Dead plates; Imperforate fuel supports

|  | F23H 17/12 |
· | Fire-bars