|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

ENGINES OR PUMPS

|  | F01 - F04 |
Note(s) Guide to the use of this subsection (classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04) The following notes are meant to assist in the use of this part of the classification scheme. In this subsection, subclasses or groups designating "engines" or "pumps" cover methods of operating the same, unless otherwise specifically provided for. In this subsection, the following terms or expressions are used with the meanings indicated: "engine" means a device for continuously converting fluid energy into mechanical power. Thus, this term includes, for example, steam piston engines or steam turbines, per se, or internal-combustion piston engines, but it excludes single-stroke devices. "Engine" also includes the fluid-motive portion of a meter unless such portion is particularly adapted for use in a meter; "pump" means a device for continuously raising, forcing, compressing, or exhausting fluid by mechanical or other means. Thus, this term includes fans or blowers; "machine" means a device which could equally be an engine and a pump, and not a device which is restricted to an engine or one which is restricted to a pump; "positive displacement" means the way the energy of a working fluid is transformed into mechanical energy, in which variations of volume created by the working fluid in a working chamber produce equivalent displacements of the mechanical member transmitting the energy, the dynamic effect of the fluid being of minor importance, and vice versa; "non-positive displacement" means the way the energy of a working fluid is transformed into mechanical energy, by transformation of the energy of the working fluid into kinetic energy, and vice versa; "oscillating-piston machine" means a positive-displacement machine in which a fluid-engaging work-transmitting member oscillates. This definition applies also to engines and pumps; "rotary-piston machine" means a positive-displacement machine in which a fluid-engaging work-transmitting member rotates about a fixed axis or about an axis moving along a circular or similar orbit. This definition applies also to engines and pumps; "rotary piston" means the work-transmitting member of a rotary-piston machine and may be of any suitable form, e.g., like a toothed gear; "cooperating members" means the "oscillating piston" or "rotary piston" and another member, e.g., the working-chamber wall, which assists in the driving or pumping action; "movement of the co-operating members" is to be interpreted as relative, so that one of the "co-operating members" may be stationary, even though reference may be made to its rotational axis, or both may move; "teeth or tooth equivalents" include lobes, projections or abutments; "internal-axis type" means that the rotational axes of the inner and outer co-operating members remain at all times within the outer member, e.g., in a similar manner to that of a pinion meshing with the internal teeth of a ring gear; "free piston" means a piston of which the length of stroke is not defined by any member driven thereby; "cylinders" means positive-displacement working chambers in general. Thus, this term is not restricted to cylinders of circular cross-section; "main shaft" means the shaft which converts reciprocating piston motion into rotary motion or vice versa; "plant" means an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam; "working fluid" means the driven fluid in a pump and the driving fluid in an engine. The working fluid may be in a gaseous state, i.e., compressible, or liquid. In the former case coexistence of two states is possible; "steam" includes condensable vapours in general, and "special vapour" is used when steam is excluded; "reaction type" as applied to non-positive-displacement machines or engines means machines or engines in which pressure/velocity transformation takes place wholly or partly in the rotor. Machines or engines with no, or only slight, pressure/velocity transformation in the rotor are called "impulse type". In this subsection: cyclically operating valves, lubricating, gas-flow silencers or exhaust apparatus, or cooling are classified in subclasses Fulltext... Hierarchy... Expanded...F01L, Fulltext... Hierarchy... Expanded...F01M, Fulltext... Hierarchy... Expanded...F01N, Fulltext... Hierarchy... Expanded...F01P irrespective of their stated application, unless their classifying features are peculiar to their application, in which case they are classified only in the relevant subclass of classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04; lubricating, gas-flow silencers or exhaust apparatus, or cooling of machines or engines are classified in subclasses Fulltext... Hierarchy... Expanded...F01M, Fulltext... Hierarchy... Expanded...F01N, Fulltext... Hierarchy... Expanded...F01P except for those peculiar to steam engines which are classified in subclass Fulltext... Hierarchy... Expanded...F01B. For use of this subsection with a good understanding, it is essential to remember, so far as subclasses Fulltext... Hierarchy... Expanded...F01B, Fulltext... Hierarchy... Expanded...F01C, Fulltext... Hierarchy... Expanded...F01D, Fulltext... Hierarchy... Expanded...F03B, and Fulltext... Hierarchy... Expanded...F04B, Fulltext... Hierarchy... Expanded...F04C, Fulltext... Hierarchy... Expanded...F04D, which form its skeleton, are concerned: the principle which resides in their elaboration, the classifying characteristics which they call for, and their complementarity. Principle This concerns essentially the subclasses listed above. Other subclasses, notably those of class Fulltext... Hierarchy... Expanded...F02, which cover better-defined matter, are not considered here. Each subclass covers fundamentally a genus of apparatus (engine or pump) and by extension covers equally "machines" of the same kind. Two different subjects, one having a more general character than the other, are thus covered by the same subclass. Subclasses Fulltext... Hierarchy... Expanded...F01B, Fulltext... Hierarchy... Expanded...F03B, Fulltext... Hierarchy... Expanded...F04B, beyond the two subjects which they cover, have further a character of generality in relation to other subclasses concerning the different species of apparatus in the genus concerned. This generality applies as well for the two subjects dealt with, without these always being in relation to the same subclasses. Thus, subclass Fulltext... Hierarchy... Expanded...F03B, in its part dealing with "machines", should be considered as being the general class relating to subclasses Fulltext... Hierarchy... Expanded...F04B, Fulltext... Hierarchy... Expanded...F04C, and in its part dealing with "engines" as being general in relation to subclass Fulltext... Hierarchy... Expanded...F03C. Characteristics The principal classifying characteristic of the subclass is that of genera of apparatus, of which there are three possible: Machines; engines; pumps. As stated above, "machines" are always associated with one of the other two genera. These main genera are subdivided according to the general principles of operation of the apparatus: Positive displacement; non-positive displacement. The positive displacement apparatus are further subdivided according to the ways of putting into effect the principle of operation, that is, to the kind of apparatus: Simple reciprocating piston; rotary or oscillating piston; other kind. Another classifying characteristic is that of the working fluid, in respect of which three kinds of apparatus are possible, namely: Liquid and elastic fluid; elastic fluid; liquid. Complementarity This resides in association of pairs of the subclasses listed above, according to the characteristics under consideration in respect of kind of apparatus or working fluid. The subclasses concerned with the various principles, characteristics and complementarity are shown in the subsection index below. It is seen from this index that: For the same kind of apparatus in a given genus, the characteristics of "working fluid" associates: Fulltext... Hierarchy... Expanded...F01B and Fulltext... Hierarchy... Expanded...F04B to Machines Fulltext... Hierarchy... Expanded...F01C and Fulltext... Hierarchy... Expanded...F04C to Machines Fulltext... Hierarchy... Expanded...F01D and Fulltext... Hierarchy... Expanded...F03B to Machines Fulltext... Hierarchy... Expanded...F01B and Fulltext... Hierarchy... Expanded...F03C to Engines Fulltext... Hierarchy... Expanded...F01C and Fulltext... Hierarchy... Expanded...F03C to Engines Fulltext... Hierarchy... Expanded...F01D and Fulltext... Hierarchy... Expanded...F03B to Engines For the same kind of working fluid, the "apparatus" characteristic relates subclasses in the same way as considerations of relative generality.

|  | 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

|  | F02 |
COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines Fulltext... Hierarchy... Expanded...F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

|  | F02B |
INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (internal-combustion turbines Fulltext... Hierarchy... Expanded...F02C; plants in which engines use combustion products Fulltext... Hierarchy... Expanded...F02C, Fulltext... Hierarchy... Expanded...F02G)

|  | F02B |
Note(s) In this subclass, the following terms or expression are used with the meanings indicated: "positive ignition" means ignition by a source external to the working fluid, e.g. by spark or incandescent source; "charging" means forcing air or fuel-air mixture into engine cylinders, and thus includes supercharging; "scavenging" means forcing the combustion residues from the cylinders other than by movement of the working pistons, and thus includes tuned exhaust systems. Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards Note (1). Engines with specified cycles or number of cylinders are classified in group Fulltext... Hierarchy... Expanded...F02B 75/02 or Fulltext... Hierarchy... Expanded...F02B 75/00, unless other classifying features predominate.

|  | F02B |
Subclass index
ENGINES USING FLUID FUEL |
Characterised by fluid to be compressed or by ignition | 1/00 - 11/00
Characterised by the combustion, inlet or charging, or evacuation |
combustion |
chambers for: precombustion; air storage; combustion | 19/00; 21/00; 23/00
charge: stratification; rotation | 17/00; 31/00
introduction of fuel | 13/00, 15/00, 49/00
inlet or charging, or scavenging |
general characteristics; details | 25/00 - 29/00; 29/00
pumps; details | 33/00 - 37/00; 39/00
Special means for improving efficiency | 41/00
ENGINES USING NON-LIQUID FUEL, THEIR COMBINATIONS WITH FUEL-GENERATING APPARATUS | 43/00, 45/00
OPERATION CHARACTERISED BY TREATMENT OR PRETREATMENT OF FUEL, AIR, OR MIXTURE | 7/00, 47/00, 49/00, 51/00
SPECIAL FORMS OR APPLICATIONS |
Kinds of engine |
kinds of piston: rotary, oscillating; reciprocating in rotary engines or movable cylinders; free-piston or without rotating main shaft | 53/00, 55/00; 57/00, 59/00; 71/00
convertible or with interchangeable parts | 69/00
with special auxiliary apparatus | 67/00
other kinds; component parts, details, or accessories | 75/00; 77/00
Combinations, not otherwise provided for, of two or more engines | 73/00
Engines for particular use, combinations with other devices | 61/00 - 67/00
RUNNING-IN | 79/00

|  | F02C |
GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines Fulltext... Hierarchy... Expanded...F01D; jet-propulsion plants Fulltext... Hierarchy... Expanded...F02K; construction of compressors or fans Fulltext... Hierarchy... Expanded...F04; combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles Fulltext... Hierarchy... Expanded...F23C 10/00; generating combustion products of high pressure or high velocity Fulltext... Hierarchy... Expanded...F23R; using gas turbines in compression refrigeration plants Fulltext... Hierarchy... Expanded...F25B 11/00; using gas-turbine plants in vehicles, see the relevant vehicle classes)

|  | F02C |
Note(s) This subclass covers: combustion product or hot gas turbine plants; internal combustion turbines or turbine plants; turbine plants in which the working fluid is an unheated, pressurised gas. This subclass does not cover: steam turbine plants, which are covered by subclass Fulltext... Hierarchy... Expanded...F01K; special vapour plants, which are covered by subclass Fulltext... Hierarchy... Expanded...F01K. In this subclass, the following expression is used with the meaning indicated: "gas-turbine plants" covers all the subject matter of Note (1) above and covers also features of jet-propulsion plants common to gas-turbine plants. Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01.

|  | F02D |
CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed Fulltext... Hierarchy... Expanded...B60K 31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit Fulltext... Hierarchy... Expanded...B60W; cyclically operating valves for combustion engines Fulltext... Hierarchy... Expanded...F01L; controlling combustion engine lubrication Fulltext... Hierarchy... Expanded...F01M; cooling internal-combustion engines Fulltext... Hierarchy... Expanded...F01P; supplying combustion engines with combustible mixtures or constituents thereof, e.g. carburettors, injection pumps, Fulltext... Hierarchy... Expanded...F02M; starting of combustion engines Fulltext... Hierarchy... Expanded...F02N; controlling of ignition Fulltext... Hierarchy... Expanded...F02P; controlling gas-turbine plants, jet-propulsion plants, or combustion-product engine plants, see the relevant subclasses for these plants) [4,8]

|  | F02D |
Note(s) In this subclass, the following term or expression is used with the meanings indicated: "fuel injection" means the introduction of a combustible substance into a space, e.g. cylinder, by means of a pressure source, e.g. a pump, continuously or cyclically acting behind the substance; "supercharging" means supplying to the working space, e.g. cylinder, combustion-air pressurised by means of a pressure source, e.g. a pump. Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01. In this subclass, electrical aspects of control arrangements are classified in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02D 41/00-F02D 45/00. [4]

|  | F02D |
Subclass index
CONTROLLING COMBUSTION ENGINES IN GENERAL |
Characterised by action on engine operation |
on injection: general; low pressure; other means | 1/00; 3/00; 7/00
by throttling air or fuel-and-air induction or exhaust | 9/00
on valve-operating cycle; varying compression ratio | 13/00; 15/00
cutting-out cylinders, rendering engines inoperative or idling | 17/00
on delivery of fuel or combustion-air, not otherwise provided for | 33/00
on two or more associated functions not otherwise provided for | 37/00
Characterised by initiating or actuating means |
non-automatic initiation, e.g. by operator | 11/00
initiation by speed-sensing governors or by interior or exterior conditions, not otherwise provided for | 31/00, 35/00
Programme control | 28/00
CONTROL OF PARTICULAR ENGINES |
engines: characterised by fuel; by combustion medium used; by supercharge | 19/00; 21/00; 23/00
co-operating engines; reversible engines; engines driving vehicle or particular devices | 25/00; 27/00; 29/00
OTHER CONTROL |
Non-electrical | 39/00
Electrical | 41/00 - 45/00

|  | F02F |
CYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES (specially adapted for rotary-piston or oscillating-piston internal-combustion engines Fulltext... Hierarchy... Expanded...F02B; specially adapted for gas-turbine plants Fulltext... Hierarchy... Expanded...F02C; specially adapted for jet-propulsion plants Fulltext... Hierarchy... Expanded...F02K) [2]

|  | F02F |
Note(s) Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01. Class Fulltext... Hierarchy... Expanded...F16 takes precedence over this subclass, except for subject matter specific to combustion engines.

|  | F02G |
HOT-GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS (steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid Fulltext... Hierarchy... Expanded...F01K; gas-turbine plants Fulltext... Hierarchy... Expanded...F02C; jet-propulsion plants Fulltext... Hierarchy... Expanded...F02K); USE OF WASTE HEAT OF COMBUSTION ENGINES, NOT OTHERWISE PROVIDED FOR

|  | F02G |
Note(s) Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01.

|  | F02K |
JET-PROPULSION PLANTS (arrangement or mounting of jet-propulsion plants in land vehicles or vehicles in general Fulltext... Hierarchy... Expanded...B60K; arrangement or mounting of jet-propulsion plants in waterborne vessels Fulltext... Hierarchy... Expanded...B63H; controlling aircraft attitude, flight direction, or altitude by jet reaction Fulltext... Hierarchy... Expanded...B64C; arrangement or mounting of jet-propulsion plants in aircraft Fulltext... Hierarchy... Expanded...B64D; plants characterised by the power of the working fluid being divided between jet propulsion and another form of propulsion, e.g. propeller, Fulltext... Hierarchy... Expanded...F02B, Fulltext... Hierarchy... Expanded...F02C; features of jet-propulsion plants common to gas-turbine plants, air intakes or fuel supply control of air-breathing jet-propulsion plants Fulltext... Hierarchy... Expanded...F02C)

|  | F02K |
Note(s) In this subclass, the following expression is used with the meaning indicated: "jet-propulsion plants" means plants using combustion to produce a fluid stream from which a propulsive thrust on the plants is obtained on the reaction principle. Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01.

|  | F02K |
Subclass index
PLANTS CHARACTERISED BY JET PIPE OR NOZZLE | 1/00, 9/00
PLANTS WITH COMPRESSOR OR FAN | 3/00, 5/00
PLANTS WITHOUT COMPRESSOR OR FAN | 7/00
ROCKET-ENGINE PLANTS | 9/00
CONTROL | 1/00, 7/00, 9/00
OTHER PLANTS | 99/00

|  | F02M |
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF (charging such engines Fulltext... Hierarchy... Expanded...F02B)

|  | F02M |
Note(s) In this subclass, the following terms or expressions are used with the meanings indicated: "carburettors" means essentially apparatus for mixing fuel with air, the fuel being brought into mixing contact with the air by lowering the air pressure, e.g. in a venturi; "fuel-injection apparatus" means apparatus for introducing fuel into a space, e.g. engine cylinder, by pressurising the fuel, e.g. by a pump acting behind the fuel, and thus includes the so-called "solid-fuel injection" in which liquid fuel is introduced without any admixture of gas; "low-pressure fuel injection" means fuel injection in which the fuel-air mixture containing fuel thus injected will be substantially compressed in the compression stroke of the engine; "pumping element" means a single piston-cylinder unit in a reciprocating-piston fuel-injection pump or the equivalent unit in any other type of fuel-injection pump. Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01.

|  | F02M |
Subclass index
SUPPLYING WITH LIQUID FUEL |
Carburettors |
starting, idling; float-controlled fuel level; mixture control; throttling, mixing chambers | 1/00, 3/00; 5/00; 7/00; 9/00
heating, cooling, insulating | 15/00
multi-stage, register type; combinations of carburettors or fuels; combination with low-pressure injection | 11/00; 13/00; 71/00
other characteristics; other details, or accessories | 17/00; 19/00
Injection apparatus |
general characteristics, injection without gas |
with two or more sequentially-fed injectors; with two or more liquids | 41/00; 43/00
with cyclic delivery characteristics; with fluid-actuated valves | 45/00; 47/00
with pump or injector actuated by cylinder pressure or by the piston | 49/00
electrically-operated | 51/00
with heating, cooling, or insulating means; characterised by fuel pipes or venting means | 53/00; 55/00
injectors combined with other devices | 57/00
arrangements of apparatus relative to engine, related pump drives | 39/00
other adaptations of pumps; other injectors | 59/00; 61/00
other apparatus, details, or accessories | 63/00, 69/00
testing | 65/00
using high-pressure gas | 67/00
low-pressure apparatus | 51/02, 69/00, 71/00
SUPPLYING WITH NON-LIQUID FUEL | 21/00
FEEDING OR PRETREATING AIR, FUEL, OR FUEL-AIR MIXTURE |
Pre-treating fuel, air, or mixture |
adding secondary air; adding non-fuel substances or secondary fuel | 23/00; 25/00
by catalytic, electrical, or magnetic means, or by sound or radiation; thermally | 27/00; 31/00
by re-atomising or homogenising; air cleaning; other treatment | 29/00; 35/00; 33/00
Air intakes or silencers, induction systems | 35/00
Fuel transfer to carburettors or injection apparatus | 37/00
SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS | 99/00

|  | F02N |
STARTING OF COMBUSTION ENGINES (starting of free-piston combustion-engines Fulltext... Hierarchy... Expanded...F02B 71/00; starting of gas-turbine plants Fulltext... Hierarchy... Expanded...F02C 7/26); STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR

|  | F02N |
Note(s) Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01. The starting of engines which are not explicitly stated to be combustion engines is classified in this subclass in so far as their starting is equivalent to that of combustion engines.

|  | F02N |
Subclass index
STARTING BY MUSCLE POWER | 1/00, 3/00, 5/00
STARTING OTHERWISE |
With mechanical energy storage | 5/00
By fluid motor; by electric motor | 7/00; 11/00
By direct action in the working chamber: by fluid pressure; by explosives | 9/00; 13/00
By other apparatus, details, accessories | 15/00
OTHER MEANS OR AIDS FOR STARTING | 17/00

|  | F02P |
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES (specially adapted for rotary-piston or oscillating-piston engines Fulltext... Hierarchy... Expanded...F02B 53/00; ignition of combustion apparatus in general, glowing plugs Fulltext... Hierarchy... Expanded...F23Q; measuring of physical variables in general Fulltext... Hierarchy... Expanded...G01; controlling in general Fulltext... Hierarchy... Expanded...G05; data processing in general Fulltext... Hierarchy... Expanded...G06; electrical components in general, see section H; sparking plugs Fulltext... Hierarchy... Expanded...H01T)

|  | F02P |
Subclass index
ELECTRIC SPARK IGNITION |
Directly from generator; other installations | 1/00; 3/00
Sparking plugs structurally combined with engine parts | 13/00
Control: timing, distributing; other | 5/00, 7/00; 9/00
Safety means | 11/00
Other features | 15/00
Testing | 17/00
IGNITION OTHERWISE THAN BY ELECTRIC SPARK: BY INCANDESCENCE; BY DIRECT FLAME; BY OTHER MEANS | 19/00; 21/00; 23/00