|  | 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

|  | F25 |
REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES

|  | F25B |
REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS (heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion Fulltext... Hierarchy... Expanded...C09K 5/00; pumps, compressors Fulltext... Hierarchy... Expanded...F04; use of heat pumps for domestic or space-heating or for domestic hot-water supply Fulltext... Hierarchy... Expanded...F24D; air-conditioning, air-humidification Fulltext... Hierarchy... Expanded...F24F; fluid heaters using heat pumps Fulltext... Hierarchy... Expanded...F24H)

|  | F25B |
Note(s) Attention is drawn to Note (2) following the title of subclass Fulltext... Hierarchy... Expanded...F24F. [5]

|  | F25B |
Subclass index
MODE OF OPERATION |
Compression type |
characterised by the cycle | 1/00, 13/00
characterised by the arrangement |
self-contained rotary; with several evaporation circuits; with several condenser circuits; with cascade operation | 3/00; 5/00; 6/00; 7/00
characterised by the refrigerant | 9/00
using turbines | 11/00
Sorption type | 15/00, 17/00
Other types having a single mode of operation, using: evaporation without recovery; electric or magnetic effects; other effect | 19/00; 21/00; 23/00
Combinations: of above modes of operation; of heating and refrigerating | 25/00; 29/00
Heat pumps | 30/00
Using special energy source | 27/00
DETAILS, ARRANGEMENTS, OR COMPONENTS |
Components: boilers, analysers, rectifiers; boiler-absorbers; absorbers, adsorbers; evaporators, condensers; subcoolers, desuper- heaters, superheaters | 33/00; 35/00; 37/00; 39/00; 40/00
Arrangements |
compressor arrangement; fluid circulation; separating or purifying gases | 31/00; 41/00; 43/00
for charging or discharging refrigerant; for combating corrosion or deposits | 45/00; 47/00
Mounting of control and safety devices | 49/00

|  | F25C |
PRODUCTION, WORKING, STORING, OR DISTRIBUTION OF ICE (frozen sweets, including ice-cream, their production Fulltext... Hierarchy... Expanded...A23G 9/00; concentrating solutions by removing frozen solvents Fulltext... Hierarchy... Expanded...B01D 9/04; purification of water by freezing Fulltext... Hierarchy... Expanded...C02F 1/22; refrigeration machines, plants, or systems Fulltext... Hierarchy... Expanded...F25B; solidification of gases or gaseous mixtures Fulltext... Hierarchy... Expanded...F25J; freeze-drying Fulltext... Hierarchy... Expanded...F26B) [2]

|  | F25C |
Note(s) In this subclass, the following term is used with the meaning indicated: "ice" means any frozen liquid and also covers frozen semiliquids or pasty substances. [2]

|  | F25D |
REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS (refrigerated showcases Fulltext... Hierarchy... Expanded...A47F 3/04; thermally-insulated vessels for domestic use Fulltext... Hierarchy... Expanded...A47J 41/00; refrigerated vehicles, see the appropriate subclasses of classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B60-B64; containers with thermal insulation in general Fulltext... Hierarchy... Expanded...B65D 81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion Fulltext... Hierarchy... Expanded...C09K 5/00; thermally-insulated vessels for liquefied or solidified gases Fulltext... Hierarchy... Expanded...F17C; air-conditioning or air-humidification Fulltext... Hierarchy... Expanded...F24F; refrigeration machines, plants, or systems Fulltext... Hierarchy... Expanded...F25B; cooling of instruments or comparable apparatus without refrigeration Fulltext... Hierarchy... Expanded...G12B; cooling of engines or pumps, see the relevant classes)

|  | F25D |
Note(s) In this subclass, the following term is used with the meaning indicated: "device" means an enclosed space to be cooled; such devices being associated either with refrigerating machinery, e.g. in a refrigerator, or with other cold sources, e.g. in an ice-box. Attention is drawn to Note (2) following the title of subclass Fulltext... Hierarchy... Expanded...F24F. [5]

|  | F25D |
Subclass index
DEVICES NOT ASSOCIATED WITH REFRIGERATING MACHINERY |
Using cold air or water; other cold materials or bodies | 1/00; 3/00
Using endothermic chemical reactions, or evaporation without recovery | 5/00, 7/00
Other devices, combinations | 9/00
DEVICES ASSOCIATED WITH REFRIGERATING MACHINERY: SELF-CONTAINED MOVABLE; STATIONARY; OTHER | 11/00; 13/00; 15/00, 16/00
STRUCTURAL PARTS OR ARRANGEMENTS, OF GENERAL APPLICATION: GENERAL; DEFROSTING; HANDLING OF ARTICLES TO BE COOLED | 23/00; 21/00; 25/00
CIRCULATING COOLING FLUID OR GAS; LIGHTING | 17/00; 27/00
ARRANGEMENT OR MOUNTING: OF REFRIGERATION UNITS; OF CONTROL OR SAFETY DEVICES | 19/00; 29/00
OTHER APPARATUS | 31/00

|  | F25J |
LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT (cryogenic pumps Fulltext... Hierarchy... Expanded...F04B 37/08; gas storage vessels, gas-holders Fulltext... Hierarchy... Expanded...F17; filling vessels with, or discharging from vessels, compressed, liquefied, or solidified gases Fulltext... Hierarchy... Expanded...F17C; refrigeration machines, plants, or systems Fulltext... Hierarchy... Expanded...F25B)