| F01B |
Machines or engines, in general or of positive-displacement type, e.g. steam engines |
| F01C |
Rotary-piston or oscillating-piston machines or engines |
| F01D |
Non-positive-displacement machines or engines, e.g. steam turbines |
| F01K |
Steam engine plants; steam accumulators; engine plants not otherwise provided for; engines using special working fluids or cycles |
| F01L |
Cyclically operating valves for machines or engines |
| F01M |
Lubricating of machines or engines in general; lubricating internal-combustion engines; crankcase ventilating |
| F01N |
Gas-flow silencers or exhaust apparatus for machines or engines in general; gas-flow silencers or exhaust apparatus for internal-combustion engines |
| F01P |
Cooling of machines or engines in general; cooling of internal-combustion engines |
| F02B |
Internal-combustion piston engines; combustion engines in general |
| F02C |
Gas-turbine plants; air intakes for jet-propulsion plants; controlling fuel supply in air-breathing jet-propulsion plants |
| F02D |
Controlling combustion engines |
| F02F |
Cylinders, pistons, or casings for combustion engines; arrangements of sealings in combustion engines |
| F02G |
Hot-gas or combustion-product positive-displacement engine plants; use of waste heat of combustion engines, not otherwise provided for |
| F02K |
Jet-propulsion plants |
| F02M |
Supplying combustion engines in general with combustible mixtures or constituents thereof |
| F02N |
Starting of combustion engines; starting aids for such engines, not otherwise provided for |
| F02P |
Ignition, other than compression ignition, for internal-combustion engines; testing of ignition timing in compression-ignition engines |
| F03B |
Machines or engines for liquids |
| F03C |
Positive-displacement engines driven by liquids |
| F03D |
Wind motors |
| F03G |
Spring, weight, inertia, or like motors; mechanical-power-producing devices or mechanisms, not otherwise provided for or using energy sources not otherwise provided for |
| F03H |
Producing a reactive propulsive thrust, not otherwise provided for |
| F04B |
Positive-displacement machines for liquids; pumps |
| F04C |
Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; rotary-piston, or oscillating-piston, positive-displacement pumps |
| F04D |
Non-positive-displacement pumps |
| F04F |
Pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped; siphons |
| F15B |
Systems acting by means of fluids in general; fluid-pressure actuators, e.g. servomotors; details of fluid-pressure systems, not otherwise provided for |
| F15C |
Fluid-circuit elements predominantly used for computing or control purposes |
| F15D |
Fluid dynamics, i.e. methods or means for influencing the flow of gases or liquids |
| F16B |
Devices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges; joints or jointing |
| F16C |
Shafts; flexible shafts; mechanical means for transmitting movement in a flexible sheathing; elements of crankshaft mechanisms; pivots; pivotal connections; rotary engineering elements other than gearing, coupling, clutch or brake elements; bearings |
| F16D |
Couplings for transmitting rotation; clutches; brakes |
| F16F |
Springs; shock-absorbers; means for damping vibration |
| F16G |
Belts, cables, or ropes, predominantly used for driving purposes; chains; fittings predominantly used therefor |
| F16H |
Gearing |
| F16J |
Pistons; cylinders; pressure vessels in general; sealings |
| F16K |
Valves; taps; cocks; actuating-floats; devices for venting or aerating |
| F16L |
Pipes; joints or fittings for pipes; supports for pipes, cables or protective tubing; means for thermal insulation in general |
| F16M |
Frames, casings or beds of engines, machines or apparatus, not specific to engines, machines or apparatus provided for elsewhere; stands; supports |
| F16N |
Lubricating |
| F16P |
Safety devices in general |
| F16S |
Constructional elements in general; structures built-up from such elements, in general |
| F16T |
Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours |
| F17B |
Gas-holders of variable capacity |
| F17C |
Vessels for containing or storing compressed, liquefied, or solidified gases; fixed-capacity gas-holders; filling vessels with, or discharging from vessels, compressed, liquefied, or solidified gases |
| F17D |
Pipe-line systems; pipe-lines |
| F21H |
Incandescent mantles; other incandescent bodies heated by combustion |
| F21K |
Non-electric light sources using luminescence; light sources using electrochemiluminescence; light sources using charges of combustible material; light sources using semiconductor devices as light-generating elements; light sources not otherwise provided for |
| F21L |
Lighting devices or systems thereof, being portable or specially adapted for transportation |
| F21S |
Non-portable lighting devices; systems thereof; vehicle lighting devices specially adapted for vehicle exteriors |
| F21V |
Functional features or details of lighting devices or systems thereof; structural combinations of lighting devices with other articles, not otherwise provided for |
| F21W |
Indexing scheme associated with subclasses , , and , relating to uses or applications of lighting devices or systems |
| F21Y |
Indexing scheme associated with subclasses , , and , relating to the form or the kind of the light sources or of the colour of the light emitted |
| F22B |
Methods of steam generation; steam boilers |
| F22D |
Preheating, or accumulating preheated, feed-water for steam generation; feed-water supply for steam generation; controlling water level for steam generation; auxiliary devices for promoting water circulation within steam boilers |
| F22G |
Superheating of steam |
| F23B |
Methods or apparatus for combustion using only solid fuel |
| F23C |
Methods or apparatus for combustion using fluid fuel or solid fuel suspended in air |
| F23D |
Burners |
| F23G |
Cremation furnaces; consuming waste or low grade fuels by combustion |
| F23H |
Grates; cleaning or raking grates |
| F23J |
Removal or treatment of combustion products or combustion residues; flues |
| F23K |
Feeding fuel to combustion apparatus |
| F23L |
Supplying air or non-combustible liquids or gases to combustion apparatus in general; valves or dampers specially adapted for controlling air supply or draught in combustion apparatus; inducing draught in combustion apparatus; tops for chimneys or ventilating shafts; terminals for flues |
| F23M |
Casings, linings, walls or doors specially adapted for combustion chambers, e.g. firebridges; devices for deflecting air, flames or combustion products in combustion chambers; safety arrangements specially adapted for combustion apparatus; details of combustion chambers, not otherwise provided for |
| F23N |
Regulating or controlling combustion |
| F23Q |
Ignition; extinguishing devices |
| F23R |
Generating combustion products of high pressure or high velocity, e.g. gas-turbine combustion chambers |
| F24B |
Domestic stoves or ranges for solid fuels ; implements for use in connection with stoves or ranges |
| F24C |
Domestic stoves or ranges; details of domestic stoves or ranges, of general application |
| F24D |
Domestic- or space-heating systems, e.g. central heating systems; domestic hot-water supply systems; elements or components therefor |
| F24F |
Air-conditioning; air-humidification; ventilation; use of air currents for screening |
| F24H |
Fluid heaters, e.g. water or air heaters, having heat-generating means, e.g. heat pumps, in general |
| F24J |
Production or use of heat not otherwise provided for (materials therefor C09K 5/00;engines or other mechanisms for producing mechanical power from heat, see the relevant classes, e.g. f03g for using natural heat) |
| F24S |
Solar heat collectors; solar heat systems |
| F24T |
Geothermal collectors; geothermal systems |
| F24V |
Collection, production or use of heat not otherwise provided for |
| F25B |
Refrigeration machines, plants or systems; combined heating and refrigeration systems; heat pump systems |
| F25C |
Producing, working or handling ice |
| F25D |
Refrigerators; cold rooms; ice-boxes; cooling or freezing apparatus not otherwise provided for |
| F25J |
Liquefaction, solidification, or separation of gases or gaseous mixtures by pressure and cold treatment |
| F26B |
Drying solid materials or objects by removing liquid therefrom |
| F27B |
Furnaces, kilns, ovens, or retorts in general; open sintering or like apparatus |
| F27D |
Details or accessories of furnaces, kilns, ovens, or retorts, in so far as they are of kinds occurring in more than one kind of furnace |
| F28B |
Steam or vapour condensers |
| F28C |
Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media come into direct contact without chemical interaction |
| F28D |
Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact; heat storage plants or apparatus in general |
| F28F |
Details of heat-exchange or heat-transfer apparatus, of general application |
| F28G |
Cleaning of internal or external surfaces of heat-exchange or heat-transfer conduits, e.g. water tubes of boilers |
| F41A |
Functional features or details common to both smallarms and ordnance, e.g. cannons; mountings for smallarms or ordnance |
| F41B |
Weapons for projecting missiles without use of explosive or combustible propellant charge; weapons not otherwise provided for |
| F41C |
Smallarms, e.g. pistols or rifles; accessories therefor |
| F41F |
Apparatus for launching projectiles or missiles from barrels, e.g. cannons; launchers for rockets or torpedoes; harpoon guns |
| F41G |
Weapon sights; aiming |
| F41H |
Armour; armoured turrets; armoured or armed vehicles; means of attack or defence, e.g. camouflage, in general |
| F41J |
Targets; target ranges; bullet catchers |
| F42B |
Explosive charges, e.g. for blasting; fireworks; ammunition |
| F42C |
Ammunition fuzes; arming or safety means therefor |
| F42D |
Blasting |
| F99Z |
Subject matter not otherwise provided for in this section |
