Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
F01D 11/2

Actively adjusting tip-clearance

Introduced: January 1995

Last revised: January 2006

Full Title

Preventing or minimising internal leakage of working fluid, e.g. between stages > for sealing space between rotor blade tips and stator > Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing > Actively adjusting tip-clearance

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

2 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • F01D 11/22 by mechanically actuating the stator or rotor components, e.g. moving shroud sections relative to the rotor
  • F01D 11/24 by selectively cooling or heating stator or rotor components

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