F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
ENGINES OR PUMPS
 F01
MACHINES OR ENGINES IN GENERAL (combustion engines F02; machines for liquids F03, 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 F01C; of non-positive-displacement type F01D; crankshafts, crossheads, connecting-rods F16C; flywheels F16F; gearings for interconverting rotary motion and reciprocating motion in general F16H; pistons, piston-rods, cylinders, for engines in general F16J)
 F01B

Note(s)

  1. This subclass covers, with the exception of the matter provided for in subclasses 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.
  2. Attention is drawn to the Notes preceding class F01, especially as regards the definitions of "steam" and "special vapour".

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

Note(s)

  1. This subclass covers:
    • 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.
  2. In this subclass, the following expression is used with the meaning indicated:
    • "rotary-piston machine" includes the German expressions "Drehkolbenmaschinen", "Kreiskolbenmaschinen", and "Umlauf- kolbenmaschinen".
  3. Attention is drawn to the Notes preceding class F01, especially as regards the definitions of "rotary-piston machine", "oscillating-piston machine", "rotary piston", "co-operating members", "movement of co-operating members", "teeth or tooth-equivalents" and "internal-axis".

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

Note(s)

  1. This subclass covers:
    • 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.
  2. Attention is drawn to the Notes preceding class F01, especially as regards the definitions of "reaction type" and "impulse type".

 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 F02; steam generation F22; nuclear power plants, engine arrangements therein G21D)
 F01K

Note(s)

Attention is drawn to the Notes preceding class F01, especially as regards the definitions of "steam" and "special vapour".


 F01L
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES (valves in general F16K)
 F01L

Note(s)

  1. Attention is drawn to the Notes preceding class F01, especially Note (3).
  2. As regards the above-mentioned Note (3), attention is drawn to F01B 3/10, F01B 15/06, F01C 21/12, F02B 53/06, F03C 1/08, F04B 1/18, F04B 7/00, F04B 39/08, F04B 39/10, and F04C 15/02, F04C 29/08.

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

Note(s)

Attention is drawn to the Notes preceding class F01, especially as regards Note (3).


 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 F02M 35/00; protecting against, or damping, noise in general G10K 11/16)
 F01N

Note(s)

Attention is drawn to the Notes preceding class F01, especially as regards Note (3).


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

Note(s)

  1. In this subclass, the following terms or expresions are used with the meanings indicated:
    • "air" includes also other gaseous cooling fluids;
    • "liquid cooling" also includes 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 liquid cooling above;
    • "cooling-air" includes directly- or indirectly-acting cooling-air.
  2. Attention is drawn to the Notes preceding class F01, especially as regards Note (3).
  3. Cooling by lubricant is classified in subclass F01M when the lubrication aspect predominates, and in subclass F01P when the cooling aspect predominates.