|  | 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

|  | F22 |
STEAM GENERATION (chemical or physical apparatus for generating gases Fulltext... Hierarchy... Expanded...B01J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, Fulltext... Hierarchy... Expanded...F23J; generating combustion products of high pressure or high velocity Fulltext... Hierarchy... Expanded...F23R; water heaters not for steam generation Fulltext... Hierarchy... Expanded...F24H, Fulltext... Hierarchy... Expanded...F28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, Fulltext... Hierarchy... Expanded...F28G)

|  | F22 |
Note(s) In this class, the following term is used with the meaning indicated: "steam" covers also other condensable vapours, e.g. mercury, diphenyl, diphenyl oxide.

|  | F22G |
SUPERHEATING OF STEAM (steam-separating arrangements in boilers Fulltext... Hierarchy... Expanded...F22B 37/26)

P:10 |  | F22G 1/00 |
Steam superheating characterised by heating method (exothermal chemical reactions not involving a supply of free oxygen gas, apparatus or devices for using the heat therefrom Fulltext... Hierarchy... Expanded...F24J)

|  | F22G 1/02 |
· | with heat supply by hot flue gases from the furnace of the steam boiler

|  | F22G 1/04 |
· · | by diverting flow or hot flue gases to separate superheaters operating in reheating cycle, e.g. for reheating steam between a high-pressure turbine stage and an intermediate turbine stage

|  | F22G 1/06 |
· | with heat supply predominantly by radiation

|  | F22G 1/08 |
· · | from heated brickwork or the like

|  | F22G 1/10 |
· | with provision for superheating by throttling

|  | F22G 1/12 |
· | by mixing steam with furnace gases or other combustion products

|  | F22G 1/14 |
· | using heat generated by chemical reactions

|  | F22G 1/16 |
· | by using a separate heat source independent from heat supply of the steam boiler, e.g. by electricity, by auxiliary combustion of fuel oil

P:30 |  | F22G 3/00 |
Steam superheaters characterised by constructional features; Details or component parts thereof (general aspects of enclosed heat-exchangers Fulltext... Hierarchy... Expanded...F28D)

P:0 |  | F22G 5/00 |
Controlling superheat temperature (control systems for steam boilers Fulltext... Hierarchy... Expanded...F22B; regulating or controlling in general Fulltext... Hierarchy... Expanded...G05)

|  | F22G 5/02 |
· | Applications of combustion-control devices, e.g. tangential-firing burners, tilting burners

|  | F22G 5/04 |
· | by regulating flue gas flow, e.g. by proportioning or diverting

|  | F22G 5/06 |
· | by recirculating flue gases

|  | F22G 5/08 |
· · | preventing furnace gas backflow through recirculating fan

|  | F22G 5/10 |
· | by displacing superheater sections

|  | F22G 5/12 |
· | by attemperating the superheated steam, e.g. by injected water sprays (spray-mixers Fulltext... Hierarchy... Expanded...B01F 5/18)

|  | F22G 5/14 |
· · | by live steam

|  | F22G 5/16 |
· | by indirectly cooling or heating the superheated steam in auxiliary enclosed heat-exchanger

|  | F22G 5/18 |
· | by by-passing steam around superheater sections

|  | F22G 5/20 |
· | by combined controlling procedures

P:20 |  | F22G 7/00 |
Steam superheaters characterised by location, arrangement, or disposition

|  | F22G 7/02 |
· | in fire tubes

|  | F22G 7/04 |
· | in jackets around fire tubes

|  | F22G 7/06 |
· | in furnace tubes

|  | F22G 7/08 |
· | in fire-boxes

|  | F22G 7/10 |
· | in smoke-boxes

|  | F22G 7/12 |
· | in flues

|  | F22G 7/14 |
· | in water-tube boilers, e.g. between banks of water tubes