|  | 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

|  | F28 |
HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials Fulltext... Hierarchy... Expanded...C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation Fulltext... Hierarchy... Expanded...F24F 13/00)

|  | F28 |
Note(s) In this class, the following expressions are used with the meanings indicated: "heat exchange" means the heating or cooling of a fluid or fluent solid by direct or indirect contact with a heated or cooled fluid or fluent solid; "heat transfer" means the heating or cooling of a fluid or fluent solid by direct contact with a heated or cooled surface or body. Apparatus using heat exchange or heat transfer (as defined in Note (1) above) for specific purposes is classified either in subclass Fulltext... Hierarchy... Expanded...F28B or in the appropriate subclasses of, for example, classes Fulltext... Hierarchy... Expanded...F22, Fulltext... Hierarchy... Expanded...F24, Fulltext... Hierarchy... Expanded...F25, Fulltext... Hierarchy... Expanded...F26, or Fulltext... Hierarchy... Expanded...F27; if no such other subclass is appropriate, such apparatus is classified in subclass Fulltext... Hierarchy... Expanded...F28C or Fulltext... Hierarchy... Expanded...F28D.

|  | F28D |
HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means Fulltext... Hierarchy... Expanded...F24H; furnaces Fulltext... Hierarchy... Expanded...F27; details of heat-exchange apparatus of general application Fulltext... Hierarchy... Expanded...F28F); HEAT STORAGE PLANTS OR APPARATUS IN GENERAL [4]

|  | F28D |
Subclass index
HEAT-EXCHANGE APPARATUS WITHOUT INTERMEDIATE HEAT-TRANSFER MEDIA OR BODIES |
With stationary conduit assemblies |
for only one medium using: mass of fluid; trickle or film; the cooling effect of evaporation | 1/00; 3/00; 5/00
for both media: by tubular conduits; by plate-like conduits | 7/00; 9/00
With moving conduit assemblies | 11/00
With fluidised bed | 13/00
HEAT-EXCHANGE APPARATUS WITH INTERMEDIATE HEAT-TRANSFER MEDIA OR BODIES |
With the intermediate medium in closed tubes passing into or through the conduit walls | 15/00
In which the intermediate medium or body is contacted successively by the other media | 17/00, 19/00
HEAT STORAGE PLANTS OR APPARATUS | 20/00
OTHER HEAT-EXCHANGE APPARATUS | 21/00

P:100 |  | F28D 1/00 |
Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators (Fulltext... Hierarchy... Expanded...F28D 5/00 takes precedence)

|  | F28D 1/02 |
· | with the heat-exchange conduits immersed in the body of fluid

|  | F28D 1/04 |
· · | with tubular conduits

P:90 |  | F28D 3/00 |
Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits (Fulltext... Hierarchy... Expanded...F28D 5/00 takes precedence)

P:80 |  | F28D 5/00 |
Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation

P:70 |  | F28D 7/00 |
Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

|  | F28D 7/10 |
· | the conduits being arranged one within the other, e.g. concentrically

P:60 |  | F28D 9/00 |
Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall

P:50 |  | F28D 11/00 |
Heat-exchange apparatus employing moving conduits

P:40 |  | F28D 13/00 |
Heat-exchange apparatus using a fluidised bed

|  | F28D 15/00 - F28D 20/00 |
Heat-exchange apparatus employing intermediate heat-transfer media or bodies [3]

P:30 |  | F28D 15/00 |
Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls

|  | F28D 15/02 |
· | in which the medium condenses and evaporates, e.g. heat-pipes [4]

|  | F28D 15/04 |
· · | with tubes having a capillary structure [6]

|  | F28D 15/06 |
· · | Control arrangements therefor [6]

P:10 |  | F28D 17/00 |
Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles

P:0 |  | F28D 19/00 |
Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium

P:20 |  | F28D 20/00 |
Heat storage plants or apparatus in general (specially adapted for particular applications, see the relevant places, e.g. Fulltext... Hierarchy... Expanded...F24D 15/00); Regenerative heat-exchange apparatus not covered by groups Fulltext... Hierarchy... Expanded...F28D 17/00 or Fulltext... Hierarchy... Expanded...F28D 19/00 [4]

|  | F28D 20/02 |
· | using latent heat [6]

P:110 |  | F28D 21/00 |
Heat-exchange apparatus not covered by any of the groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F28D 1/00-F28D 20/00 [4]