IPC Subgroup
F01C 20/1 characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
Introduced: January 2006
Full Title
Control of, monitoring of, or safety arrangements for, machines or engines > characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- Subclass:
- ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
3 direct subcodes
Child Classifications
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- F01C 20/12 using sliding valves
- F01C 20/14 using rotating valves
- F01C 20/16 using lift valves
Top Applicants
Top 10 applicants by patent filingsfor class F01, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 8,496
- UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
- SAFRAN AIRCRAFT ENGINES FR 5,503
- TOYOTA MOTOR CORPORATION 4,556
- SIEMENS DE 3,992
- HYUNDAI MOTOR COMPANY KR 3,929
- RAYTHEON TECHNOLOGIES CORPORATION US 3,534
- FORD GLOBAL TECHNOLOGIES US 3,407
- TOYOTA MOTOR CORPORATION JP 3,042
- WEICHAI POWER COMPANY 2,888