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
 F24
HEATING; RANGES; VENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
 F24

Note(s)

In this class, the following terms are used with the meanings indicated:

  • "stove" includes apparatus which may have an open fire, e.g. fireplace;
  • "range" means an apparatus for cooking having elements that perform different cooking operations or cooking and heating operations.

 F24F
AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (devices for ventilating greenhouses A01G; animal husbandry A01K, e.g. controlling humidity in incubators A01K 41/00; disinfecting or sterilising of air A61L; devices for reconditioning breathing air in sealed rooms or for ventilating gasproof shelters A62B; filtering, washing or drying of gases B01D; mixing gases with vapours or liquids in general B01F 3/00; spraying B05B, B05D; removing dirt or fumes from areas where they are produced B08B 15/00; ventilation, air-conditioning, or cooling, specially adapted for vehicles, see the relevant vehicle places, e.g. B60H, B61D 27/00; production of ozone C01B 13/10; chimneys or flues E04F 17/00, E04H 12/00, F23J 11/00, F23L 17/00; air ducts or conduits E04F 17/00, F16L; ventilation in doors or windows E06B 7/02; fans, blowers F04; noise-absorbing in pipes or pipe systems F16L; tops for chimneys or ventilating shafts F23L; cooling F25; details of heat-exchange or heat-transfer apparatus, of general application F28F; apparatus for generating ions to be introduced into non-enclosed gases, e.g. the atmosphere, H01T 23/00)
 F24F

Note(s)

  1. In this subclass:
  2. In this subclass, the following terms or expressions are used with the meanings indicated:
    • "air-conditioning" means the supply of air to rooms or spaces by means which provide for the treatment of the air in at least two of the following ways:

      heating — cooling — any other kind of treatment, e.g. humidification;

    • "ventilation" means the supply of air to, or its extraction from, rooms or spaces, and systems for circulating air within rooms or spaces, but does not cover the mere treatment of air being supplied to, extracted from, or circulated within, rooms or spaces.
  3. Processes using enzymes or micro-organisms in order to:
    1. liberate, separate or purify a pre-existing compound or composition, or to
    2. treat textiles or clean solid surfaces of materials
    are further classified in subclass C12S.  [5]
 F24F
Subclass index
AIR-CONDITIONING
Room units; central systems; other systems or apparatus 1/00; 3/00; 5/00
AIR-HUMIDIFICATION 6/00
VENTILATION 7/00
SCREENING BY AIR CURRENTS 9/00
COMMON DETAILS
Control, safety 11/00
Use of energy recovery systems 12/00
Other details 13/00
 F24F 1/00 - 
F24F 5/00
Air-conditioning
P:30 F24F 1/00
Room units for air-conditioning, e.g. receiving primary air from a central station
 F24F 1/01
·  in which secondary air is induced by injector action of the primary air (F24F 1/02 takes precedence)  [3]
 F24F 1/02
·  self-contained, i.e. with all apparatus for treatment installed in a common casing
 F24F 1/04
·  ·  Arrangements for portability
P:20 F24F 3/00
Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems (room units F24F 1/00; construction of heat-exchangers F28)
 F24F 3/02
·  characterised by the pressure or velocity of the primary air (F24F 3/044 takes precedence)  [3]
 F24F 3/044
·  Systems in which all treatment is given in the central station, i.e. all-air systems  [3]
 F24F 3/06
·  characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units (F24F 3/02 takes precedence)
 F24F 3/12
·  characterised by the treatment of the air otherwise than by heating and cooling (F24F 3/02, F24F 3/06 take precedence; apparatus for the individual treatment, see the appropriate subclasses for the treatments)
 F24F 3/16
·  ·  by purification, e.g. by filtering; by sterilisation; by ozonisation
P:40 F24F 5/00
Air-conditioning systems or apparatus not covered by group F24F 1/00 or F24F 3/00
P:50 F24F 6/00
Air-humidification  [3]
 F24F 6/02
·  by evaporation of water in the air  [3]
 F24F 6/12
·  by forming water dispersions in the air  [3]
 F24F 6/18
·  by injection of steam into the air  [3]
P:60 F24F 7/00
Ventilation
 F24F 7/007
·  with forced flow (using ducting systems F24F 7/06)  [3]
 F24F 7/013
·  ·  using wall or window fans, displacing air through the wall or window  [3]
 F24F 7/02
·  Roof ventilation (F24F 7/007 takes precedence; ventilation of roof coverings E04D)  [3,6]
 F24F 7/04
·  with ducting systems
 F24F 7/06
·  ·  with forced air circulation, e.g. by fan
 F24F 7/08
·  ·  ·  with separate ducts for supplied and exhausted air  [3]
 F24F 7/10
·  ·  ·  with air supply, or exhaust, through perforated wall, floor or ceiling (outlet members for directing or distributing air F24F 13/06)  [3]
P:70 F24F 9/00
Use of air currents for screening, e.g. air curtain (air curtains for vehicles B60J 9/00)
 F24F 11/00 - 
F24F 13/00
Common features or details
P:0 F24F 11/00
Control or safety systems or apparatus (control valves per se F16K)  [3]
 F24F 11/02
·  Arrangement or mounting of control or safety devices
 F24F 11/04
·  ·  solely for controlling the rate of air-flow (F24F 11/08 takes precedence)
 F24F 11/06
·  ·  solely for controlling the supply of heating or cooling fluids for secondary treatment (F24F 11/08 takes precedence)
 F24F 11/08
·  ·  for controlling the primary treatment of air
P:10 F24F 12/00
Use of energy recovery systems in air conditioning, ventilation or screening (with both heat and humidity transfer between supplied and exhausted air F24F 3/12; heat-exchange in general F28)  [4]
P:80 F24F 13/00
Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
 F24F 13/02
·  Ducting arrangements
 F24F 13/04
·  ·  Air-mixing units (F24F 13/06 takes precedence; mixing gases in general B01F 3/00)
 F24F 13/06
·  ·  Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
 F24F 13/08
·  Air-flow control members, e.g. louvres, grilles, flaps, guide plates (F24F 7/013, F24F 13/06 take precedence; roof ventilation F24F 7/02)  [3]
 F24F 13/10
·  ·  movable, e.g. damper (F24F 13/18 takes precedence; valves in general F16K)
 F24F 13/14
·  ·  ·  built-up of tilting members, e.g. louvre
 F24F 13/15
·  ·  ·  ·  with parallel simultaneously tiltable lamellae  [3]
 F24F 13/18
·  ·  specially adapted for insertion in flat panels, e.g. in door or window-pane
 F24F 13/32
·  Supports for air-conditioning, air-humidification or ventilation units  [6]