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IPC Subgroup
F01D 5/3

Fixing blades to rotors; Blade roots

Introduced: September 1968

Last revised: January 2006

Full Title

Blades; Blade-carrying members; Heating, heat-insulating, cooling, or antivibration means on the blades or the members > Fixing blades to rotors; Blade roots

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
Subclass:
NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES

Filing statistics

IPC F01D 5/3 belongs to the parent subclass F01D, which recorded 110,124 patent applications worldwide between 2013 and 2023. Annual filings declined from 10,791 in 2013 to 7,906 in 2023 (-27%), peaking at 11,198 applications in 2014. 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

1 direct subcode

Child Classifications

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  • F01D 5/32 Locking, e.g. by final locking-blades or keys

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