F01L 3/00 Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
Introduced: September 1968
Last revised: January 2006
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 3/00 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
Additional Content
Valve-gear specially for steam engines or specially for other machines or engines with variable fluid distribution
8 direct subcodes
Child Classifications
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- F01L 3/02 Selecting particular materials for valve members or valve seats; Valve members or valve seats composed of two or more materials
- F01L 3/06 Valve members or valve seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
- F01L 3/08 Valve guides; Sealing of valve stem, e.g. sealing by lubricant
- F01L 3/1 Connecting springs to valve members
- F01L 3/12 Cooling of valves
- F01L 3/2 Shapes or constructions of valve members, not provided for in preceding subgroups of this group
- F01L 3/22 Valve seats not provided for in preceding subgroups of this group; Fixing of valve seats
- F01L 3/24 Safety means or accessories, not provided for in preceding subgroups of this group
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