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F16D 25/00

Fluid-actuated clutches

Introduced: September 1968

Last revised: January 2006

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
Subclass:
COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

Filing statistics

IPC F16D 25/00 belongs to the parent subclass F16D, which recorded 156,851 patent applications worldwide between 2013 and 2023. Annual filings declined from 12,527 in 2013 to 12,099 in 2023 (-3%), peaking at 16,031 applications in 2017. The most active applicants in class F16 are SCHAEFFLER TECHNOLOGIES & COMPANY (21,545 applications), ZAHNRADFABRIK FRIEDRICHSHAFEN (9,446 applications) and TOYOTA MOTOR CORPORATION (7,215 applications).

Source: EPO PATSTAT, worldwide filings

6 direct subcodes

Child Classifications

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  • F16D 25/02 with means for actuating or keeping engaged by a force derived at least partially from one of the shafts to be connected
  • F16D 25/04 in which the fluid actuates an elastic clutching member, e.g. a diaphragm or a pneumatic tube
  • F16D 25/08 with fluid-actuated member not rotating with a clutching member
  • F16D 25/1 Clutch systems with a plurality of fluid-actuated clutches
  • F16D 25/12 Details not specific to one of the before-mentioned types

Top Applicants

Top 10 applicants by patent filingsfor class F16, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SCHAEFFLER TECHNOLOGIES & COMPANY DE 21,545
  2. ZAHNRADFABRIK FRIEDRICHSHAFEN DE 9,446
  3. TOYOTA MOTOR CORPORATION 7,215
  4. HYUNDAI MOTOR COMPANY KR 6,846
  5. ROBERT BOSCH DE 6,106
  6. NTN CORPORATION 5,305
  7. SKF SE 4,219
  8. KIA MOTORS CORPORATION KR 3,852
  9. NSK 3,850
  10. HONDA MOTOR COMPANY 3,639