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DIFF Subgroup
F16D 43/14

with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Internally controlled automatic clutches > actuated entirely mechanically > controlled by angular speed > with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members

CPC:

Automatic clutches (varying the relationship between two coaxial shafts F16D3/10; freewheels, freewheel clutches F16D41/00) > actuated entirely mechanically > controlled by angular speed (F16D43/24 takes precedence; clutches in which the drive is transmitted through a medium consisting of small particles F16D37/00) > with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

Child Classifications

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  • F16D 2043/145 2nd only CPC only CPC only
  • F16D 43/16 with clutching members having interengaging parts IPC+CPC Available in IPC and CPC
  • F16D 43/18 with friction clutching members IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class F16,2013–2023, worldwide · Source: EPO PATSTAT

  1. SCHAEFFLER TECHNOLOGIES & COMPANY DE 22,817
  2. ZAHNRADFABRIK FRIEDRICHSHAFEN DE 10,523
  3. HYUNDAI MOTOR COMPANY KR 7,933
  4. ROBERT BOSCH DE 7,059
  5. KIA MOTORS CORPORATION KR 4,867
  6. SKF SE 4,729
  7. TOYOTA MOTOR CORPORATION JP 4,111
  8. FORD GLOBAL TECHNOLOGIES US 3,838
  9. GM GLOBAL TECHNOLOGY OPERATIONS US 3,575
  10. TOYOTA MOTOR CORPORATION 3,499