F01L 1/245 Hydraulic tappets
Introduced: January 1995
Last revised: January 2006
Full Title
Valve-gear or valve arrangements, e.g. lift-valve gear > Adjusting or compensating clearance, i.e. lash adjustment > automatically > by fluid means, e.g. hydraulically > Hydraulic tappets
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- Subclass:
- CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
Filing statistics
IPC F01L 1/245 belongs to the parent subclass F01L, which recorded 28,860 patent applications worldwide between 2013 and 2023. Annual filings declined from 3,209 in 2013 to 1,109 in 2023 (-65%), peaking at 3,780 applications in 2015. The most active applicants in class F01 are GE (GENERAL ELECTRIC COMPANY) (8,496 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (7,291 applications) and SAFRAN AIRCRAFT ENGINES (5,503 applications).
Source: EPO PATSTAT, worldwide filings
2 direct subcodes
Child Classifications
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- F01L 1/25 between cam and valve stem
- F01L 1/255 between cam and rocker arm
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