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

ENGINES AND PUMPS

|  | F01 |
MACHINES OR ENGINES IN GENERAL (combustion engines Fulltext... Hierarchy... Expanded...F02; machines for liquids Fulltext... Hierarchy... Expanded...F03, Fulltext... Hierarchy... Expanded...F04); ENGINE PLANTS IN GENERAL; STEAM ENGINES

|  | F01B |
MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES (of rotary-piston or oscillating-piston type Fulltext... Hierarchy... Expanded...F01C; of non-positive-displacement type Fulltext... Hierarchy... Expanded...F01D; crankshafts, crossheads, connecting-rods Fulltext... Hierarchy... Expanded...F16C; flywheels Fulltext... Hierarchy... Expanded...F16F; gearings for interconverting rotary motion and reciprocating motion in general Fulltext... Hierarchy... Expanded...F16H; pistons, piston-rods, cylinders, for engines in general Fulltext... Hierarchy... Expanded...F16J)

|  | F01B |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definitions of "steam" and "special vapour". This sub-class comprises the following subject-matter, except the matter provided for in sub-classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01C-F01P: engines for elastic fluids, e.g. steam engines, engines for liquids and elastic fluids, machines for elastic fluids, machines for liquids and elastic fluids.

|  | F01C |
ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES

|  | F01C |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the meanings of "rotary-piston machine", "oscillating-piston machine", "rotary piston", "co-operating members", "movement of co-operating members", "teeth or tooth-equivalents" and "internal-axis". The subject-matter of this sub-class comprises: rotary-piston or oscillating-piston engines for elastic fluids, e.g. steam, rotary-piston or oscillating-piston engines for liquids and elastic fluids, rotary-piston or oscillating-piston machines for elastic fluids, rotary-piston or oscillating-piston machines for liquids and elastic fluids. In this sub-class, the term "rotary-piston machine" embraces the German terms "Drehkolbenmaschinen", "Kreiskolbenmaschinen", and "Umlaufkolbenmaschinen".

|  | F01D |
NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

|  | F01D |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definitions of "reaction type" and "impulse type". The subject-matter of this sub-class comprises: non-positive-displacement engines for elastic fluids, e.g. steam turbines, non-positive-displacement engines for liquids and elastic fluids, non-positive-displacement machines for elastic fluids, non-positive-displacement machines for liquids and elastic fluids.

|  | F01K |
STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants Fulltext... Hierarchy... Expanded...F02; steam generation Fulltext... Hierarchy... Expanded...F22; nuclear power plants, engine arrangements therein Fulltext... Hierarchy... Expanded...G21D)

|  | F01K |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards the definitions of "steam" and "special vapour".

|  | F01L |
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES (valves in general Fulltext... Hierarchy... Expanded...F16K)

|  | F01L |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially Note 2 (b). As regards Note 2 (b), attention is drawn to Fulltext... Hierarchy... Expanded...F01B 3/10, Fulltext... Hierarchy... Expanded...F01B 15/06, Fulltext... Hierarchy... Expanded...F01C 21/12, Fulltext... Hierarchy... Expanded...F02B 53/06, Fulltext... Hierarchy... Expanded...F03C 1/08, Fulltext... Hierarchy... Expanded...F04B 1/18, Fulltext... Hierarchy... Expanded...F04B 7/00, Fulltext... Hierarchy... Expanded...F04B 39/08, Fulltext... Hierarchy... Expanded...F04B 39/10, and Fulltext... Hierarchy... Expanded...F04C 15/02, Fulltext... Hierarchy... Expanded...F04C 29/08.

|  | F01M |
LUBRICATING OF MACHINES OR ENGINES IN GENERAL (lubricating in general Fulltext... Hierarchy... Expanded...F16N); LUBRICATING INTERNAL- COMBUSTION ENGINES; CRANKCASE VENTILATING [2]

|  | F01M |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards Note 2 (b).

|  | F01N |
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines Fulltext... Hierarchy... Expanded...F02M 35/00; protecting against, or damping, noise in general Fulltext... Hierarchy... Expanded...G10K 11/16)

|  | F01N |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards Note 2 (b).

|  | F01P |
COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (heat exchange in general, radiators Fulltext... Hierarchy... Expanded...F28)

|  | F01P |
Note(s) Attention is drawn to the notes preceding class Fulltext... Hierarchy... Expanded...F01, especially as regards Note 2 (b). Cooling by lubricant is classified in sub-class Fulltext... Hierarchy... Expanded...F01M when the lubrication aspect predominates, and in sub-class Fulltext... Hierarchy... Expanded...F01P when the cooling aspect predominates. In this sub-class, the following terms are used with the meanings indicated: "Air" includes other gaseous cooling fluids. "Liquid cooling" also embraces cooling where liquid is used as the heat-transferring fluid between parts to be cooled and the air, e.g. using radiators. "Air cooling" means direct air cooling and thus excludes indirect air cooling occurring in liquid cooling systems as explained under (b). "Cooling-air" embraces directly- or indirectly-acting cooling-air.