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IPC Main Group
F01L 15/00

Valve-gear or valve arrangements, e.g. with reciprocatory slide valves, other than provided for in groups

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

7 direct subcodes

Child Classifications

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  • F01L 15/08 with cylindrical, sleeve, or part-annularly-shaped valves; Such main valves combined with auxiliary valves
  • F01L 15/1 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 15/18 Valve arrangements not provided for in preceding subgroups of this group
  • F01L 15/2 Component parts, details, 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

  1. GE (GENERAL ELECTRIC COMPANY) US 8,496
  2. UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
  3. SAFRAN AIRCRAFT ENGINES FR 5,503
  4. TOYOTA MOTOR CORPORATION 4,556
  5. SIEMENS DE 3,992
  6. HYUNDAI MOTOR COMPANY KR 3,929
  7. RAYTHEON TECHNOLOGIES CORPORATION US 3,534
  8. FORD GLOBAL TECHNOLOGIES US 3,407
  9. TOYOTA MOTOR CORPORATION JP 3,042
  10. WEICHAI POWER COMPANY 2,888