F01 MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
Description
This class encompasses general-purpose machines and engines, including steam engines and their associated plant systems. It covers the fundamental mechanical principles, components, and operational characteristics of prime movers that convert energy into mechanical work, regardless of their specific energy source or application field. The class includes steam engine design, thermodynamic cycles, engine control systems, and supporting infrastructure for engine installations. Excluded are specialized engines and machines classified in more specific mechanical engineering classes (F02–F16) and applications requiring additional technical subject matter from other sections of IPC.
8 direct subcodes
Child Classifications
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- 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; internal-combustion engines F02B; combustion-product engine plants F02G; machines or engines, other than of positive-displacement type, for liquids F03B; positive-displacement engines driven by liquids F03C; wind motors F03D; positive-displacement machines for liquids F04B; rotary-piston, or oscillating-piston, positive-displacement machines for liquids F04C)
- F01C ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00)
- F01D NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- 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; nuclear power plants, engine arrangements therein G21D)
- 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 (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- F01P COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES (arrangements in connection with cooling of propulsion units in vehicles B60K11/00; heat-transfer, heat-exchange or heat-storage materials C09K5/00; ; heat exchange in general, radiators F28)
Top Applicants
Top 10 applicants by patent filings, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 9,989
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
- SAFRAN AIRCRAFT ENGINES FR 6,248
- HYUNDAI MOTOR COMPANY KR 4,530
- SIEMENS DE 4,461
- FORD GLOBAL TECHNOLOGIES US 4,029
- RAYTHEON TECHNOLOGIES CORPORATION US 3,947
- TOYOTA MOTOR CORPORATION JP 3,734
- GE (GENERAL ELECTRIC COMPANY) 3,415
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063