|  | 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

|  | 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

|  | F25D 1/00 - F25D 9/00 |
Devices not associated with refrigerating machinery

P:70 |  | F25D 1/00 |
Devices using naturally-cold air or water

|  | F25D 1/02 |
· | using naturally-cold water, e.g. household-tap water

P:80 |  | F25D 3/00 |
Devices using other cold materials; Devices using cold-storage bodies

|  | F25D 3/02 |
· | using ice, e.g. ice-boxes

|  | F25D 3/04 |
· · | Stationary cabinets

|  | F25D 3/06 |
· · | Movable containers

|  | F25D 3/08 |
· · · | portable, i.e. adapted to be carried personally

|  | F25D 3/10 |
· | using liquefied gases, e.g. liquid air

|  | F25D 3/11 |
· · | with conveyers carrying articles to be cooled through the cooling space [4]

|  | F25D 3/12 |
· | using solidified gases, e.g. carbon-dioxide snow

|  | F25D 3/14 |
· · | portable, i.e. adapted to be carried personally

P:50 |  | F25D 5/00 |
Devices using endothermic chemical reactions, e.g. using frigorific mixtures

|  | F25D 5/02 |
· | portable, i.e. adapted to be carried personally

P:60 |  | F25D 7/00 |
Devices using evaporation effects without recovery of the vapour (butter or cheese dishes with cooling devices Fulltext... Hierarchy... Expanded...A47G 19/26)

P:40 |  | F25D 9/00 |
Devices not covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F25D 1/00-F25D 7/00; Combinations of devices covered by two or more of the groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F25D 1/00-F25D 7/00

|  | F25D 11/00 - F25D 15/00 |
Devices associated with refrigerating machinery

P:10 |  | F25D 11/00 |
Self-contained movable devices, e.g. domestic refrigerator

|  | F25D 11/02 |
· | with cooling compartments at different temperatures

|  | F25D 11/04 |
· | specially adapted for storing deep-frozen articles (Fulltext... Hierarchy... Expanded...F25D 11/02 takes precedence)

P:20 |  | F25D 13/00 |
Stationary devices, e.g. cold rooms

|  | F25D 13/02 |
· | with several cooling compartments, e.g. refrigerated locker systems

|  | F25D 13/04 |
· · | the compartments being at different temperatures

|  | F25D 13/06 |
· | with conveyers carrying articles to be cooled through the cooling space

P:30 |  | F25D 15/00 |
Devices not covered by group Fulltext... Hierarchy... Expanded...F25D 11/00 or Fulltext... Hierarchy... Expanded...F25D 13/00, e.g. non-self-contained movable devices

P:0 |  | F25D 16/00 |
Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery [5]

|  | F25D 17/00 - F25D 29/00 |
Details or features of the devices covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F25D 1/00-F25D 16/00 [5]

P:120 |  | F25D 17/00 |
Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces [3]

|  | F25D 17/02 |
· | for circulating liquids, e.g. brine

|  | F25D 17/04 |
· | for circulating gas, e.g. by natural convection [3]

|  | F25D 17/06 |
· · | by forced circulation

|  | F25D 17/08 |
· · · | using ducts

P:110 |  | F25D 19/00 |
Arrangement or mounting of refrigeration units with respect to devices

|  | F25D 19/02 |
· | plug-in type

|  | F25D 19/04 |
· | with more than one refrigeration unit

P:130 |  | F25D 21/00 |
Defrosting; Preventing frosting; Removing condensed or defrost water (removing ice or water from heat-exchange apparatus in general Fulltext... Hierarchy... Expanded...F28F 17/00; heating arrangements specially adapted for transparent or reflecting areas Fulltext... Hierarchy... Expanded...H05B 3/84)

|  | F25D 21/02 |
· | Detecting the presence of frost or condensate

|  | F25D 21/04 |
· | Preventing the formation of frost or condensate

|  | F25D 21/06 |
· | Removing frost (defrosting cycles Fulltext... Hierarchy... Expanded...F25B 47/02)

|  | F25D 21/08 |
· · | by electric heating

|  | F25D 21/10 |
· · | by spraying with fluid

|  | F25D 21/12 |
· · | by hot-fluid circulating system separate from the refrigerant system

|  | F25D 21/14 |
· | Collecting or removing condensed and defrost water; Drip trays

P:160 |  | F25D 23/00 |
General constructional features (Fulltext... Hierarchy... Expanded...F25D 21/00 takes precedence)

|  | F25D 23/02 |
· | Doors; Covers (Fulltext... Hierarchy... Expanded...F25D 23/08 takes precedence)

|  | F25D 23/04 |
· · | with special compartments, e.g. butter conditioners

|  | F25D 23/06 |
· | Walls (Fulltext... Hierarchy... Expanded...F25D 23/08 takes precedence; containers with thermal insulation Fulltext... Hierarchy... Expanded...B65D 81/38) [4]

|  | F25D 23/08 |
· | Parts formed wholly or mainly of plastics materials

|  | F25D 23/10 |
· | Arrangements for mounting in particular locations, e.g. for built-in type, for corner type

|  | F25D 23/12 |
· | Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove

P:140 |  | F25D 25/00 |
Charging, supporting, or discharging the articles to be cooled

|  | F25D 25/02 |
· | by shelves

|  | F25D 25/04 |
· | by conveyers (in general Fulltext... Hierarchy... Expanded...B65G)

P:150 |  | F25D 27/00 |
Lighting arrangements (in general Fulltext... Hierarchy... Expanded...F21)

P:100 |  | F25D 29/00 |
Arrangement or mounting of control or safety devices

P:90 |  | F25D 31/00 |
Other cooling or freezing apparatus