|  | 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 10/00); 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)

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

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

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

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

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

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

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 9/00; for travelling grates Fulltext... Hierarchy... Expanded...F23H 11/00)

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