|  | 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.

|  | F28F |
DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water or air traps, air venting Fulltext... Hierarchy... Expanded...F16)

|  | F28F |
Subclass index
DETAILS AND THEIR ARRANGEMENTS |
Elements for heat exchange or transfer and assemblies thereof |
tubular; plate-like; for movement; others | 1/00; 3/00; 5/00; 7/00
auxiliary supports for elements; sealing | 9/00; 11/00
Casings and header boxes | 9/00
Preventing deposits or corrosion | 17/00, 19/00
Special features of heat-exchange apparatus |
characterised by the selection of: constructional material; intermediate heat-exchange material | 21/00; 23/00
component parts of trickle coolers | 25/00
MODIFYING HEAT-TRANSFER; CONTROL OF APPARATUS | 13/00; 27/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS | 99/00

P:80 |  | F28F 1/00 |
Tubular elements; Assemblies of tubular elements (specially adapted for movement Fulltext... Hierarchy... Expanded...F28F 5/00)

|  | F28F 1/02 |
· | Tubular elements of cross-section which is non-circular (Fulltext... Hierarchy... Expanded...F28F 1/08, Fulltext... Hierarchy... Expanded...F28F 1/10 take precedence)

|  | F28F 1/06 |
· · | crimped or corrugated in cross-section

|  | F28F 1/08 |
· | Tubular elements crimped or corrugated in longitudinal section

|  | F28F 1/10 |
· | Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements Fulltext... Hierarchy... Expanded...F28F 1/06, Fulltext... Hierarchy... Expanded...F28F 1/08)

|  | F28F 1/12 |
· · | the means being only outside the tubular element

|  | F28F 1/24 |
· · · | and extending transversely (Fulltext... Hierarchy... Expanded...F28F 1/38 takes precedence)

|  | F28F 1/32 |
· · · · | the means having portions engaging further tubular elements

|  | F28F 1/38 |
· · · | and being staggered to form tortuous fluid passages

P:70 |  | F28F 3/00 |
Plate-like or laminated elements; Assemblies of plate-like or laminated elements (specially adapted for movement Fulltext... Hierarchy... Expanded...F28F 5/00)

|  | F28F 3/08 |
· | Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning

P:60 |  | F28F 5/00 |
Elements specially adapted for movement (arrangements for moving the elements, see the appropriate subclass for the apparatus concerned)

P:100 |  | F28F 7/00 |
Elements not covered by group Fulltext... Hierarchy... Expanded...F28F 1/00, Fulltext... Hierarchy... Expanded...F28F 3/00, or Fulltext... Hierarchy... Expanded...F28F 5/00

P:50 |  | F28F 9/00 |
Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings

|  | F28F 9/007 |
· | Auxiliary supports for elements [6]

|  | F28F 9/02 |
· | Header boxes; End plates

|  | F28F 9/04 |
· · | Arrangements for sealing elements into header boxes or end plates (joining pipes to walls in general Fulltext... Hierarchy... Expanded...F16L 41/00)

|  | F28F 9/22 |
· | Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

|  | F28F 9/26 |
· | Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators (connecting different sections in water heaters Fulltext... Hierarchy... Expanded...F24H 9/14)

P:20 |  | F28F 11/00 |
Arrangements for sealing leaky tubes or conduits (stopping flow from or in pipes in general Fulltext... Hierarchy... Expanded...F16L 55/10)

P:110 |  | F28F 13/00 |
Arrangements for modifying heat transfer, e.g. increasing, decreasing (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F28F 1/00-F28F 11/00 take precedence)

P:10 |  | F28F 17/00 |
Removing ice or water from heat-exchange apparatus

P:0 |  | F28F 19/00 |
Preventing the formation of deposits or corrosion, e.g. by using filters

P:90 |  | F28F 21/00 |
Constructions of heat-exchange apparatus characterised by the selection of particular materials

P:40 |  | F28F 23/00 |
Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions (heat-transfer, heat-exchange or heat-storage materials Fulltext... Hierarchy... Expanded...C09K 5/00)

P:120 |  | F28F 25/00 |
Component parts of trickle coolers (arrangements for increasing heat transfer Fulltext... Hierarchy... Expanded...F28F 13/00; controlling arrangements Fulltext... Hierarchy... Expanded...F28F 27/00)

P:30 |  | F28F 27/00 |
Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus

P:130 |  | F28F 99/00 |
Subject matter not provided for in other groups of this subclass [8]