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 fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
LIGHTING; HEATING
 F28
HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F24F 13/00)
 F28

Note(s)

  1. 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.
  2. Apparatus using heat exchange or heat transfer (as defined in Note (1) above) for specific purposes is classified either in subclass F28B or in the appropriate subclasses of, for example, classes F22, F24, F25, F26, or F27; if no such other subclass is appropriate, such apparatus is classified in subclass F28C or F28D.
 F28F
DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water or air traps, air venting 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 F28F 5/00)
 F28F 1/02
·  Tubular elements of cross-section which is non-circular (F28F 1/08, 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 F28F 1/06, F28F 1/08)
 F28F 1/12
·  ·  the means being only outside the tubular element
 F28F 1/24
·  ·  ·  and extending transversely (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 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 F28F 1/00, F28F 3/00, or 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 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 F24H 9/14)
P:20 F28F 11/00
Arrangements for sealing leaky tubes or conduits (stopping flow from or in pipes in general F16L 55/10)
P:110 F28F 13/00
Arrangements for modifying heat transfer, e.g. increasing, decreasing (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 C09K 5/00)
P:120 F28F 25/00
Component parts of trickle coolers (arrangements for increasing heat transfer F28F 13/00; controlling arrangements 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]