IPC Main Group
F01D 11/00 Preventing or minimising internal leakage of working fluid, e.g. between stages
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:
- NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
Related Keywords
preventing internal LEAKS of fluid within non-positive-displacement engines
2 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- F01D 11/02 by non-contact sealings, e.g. of labyrinth type
- F01D 11/08 for sealing space between rotor blade tips and stator
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