CPC Main Group
F01L 15/00 Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups F01L17/00 - F01L29/00 (valve drive or external valve-adjustment during operation, tripping-gear or tripping of valves F01L31/00)
Filing statistics
CPC F01L 15/00 belongs to the parent subclass F01L, which recorded 25,057 patent applications worldwide between 2013 and 2023. Annual filings declined from 2,769 in 2013 to 732 in 2023 (-74%), peaking at 3,219 applications in 2015. The most active applicants in class F01 are GE (GENERAL ELECTRIC COMPANY) (9,989 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (8,110 applications) and SAFRAN AIRCRAFT ENGINES (6,248 applications).
Source: EPO PATSTAT, worldwide filings
7 direct subcodes
Child Classifications
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- F01L 15/02 with valves other than cylindrical, sleeve, or part-annularly-shaped, e.g. flat D-valves
- F01L 15/08 with cylindrical, sleeve, or part-annularly-shaped valves; Such main valves combined with auxiliary valves
- F01L 15/10 with main slide valve and auxiliary valve dragged thereby
- F01L 15/12 characterised by having means for effecting pressure equilibrium between two different cylinder spaces at idling
- F01L 15/14 Arrangements with several co-operating main valves, e.g. reciprocatory and rotary
- F01L 15/18 Valves arrangements not provided for in preceding subgroups of this main group
- F01L 15/20 Component parts, details, or accessories, not provided for in preceding subgroups of this main group
Top Applicants
Top 10 applicants by patent filingsfor class F01, 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