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PCE
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DIFF Subgroup
F16D 43/08

the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces

Introduced: September 1968

Title

Titles differ between systems:

IPC: the pressure ring actuating friction plates, cones, or similar axially-movable friction surfaces

CPC: the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces

Full Title

Full titles differ between systems:

IPC:

Internally controlled automatic clutches > actuated entirely mechanically > controlled by angular speed > with centrifugal masses actuating axially a movable pressure ring or the like > the pressure ring actuating friction plates, cones, or similar axially-movable friction surfaces

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 axially a movable pressure ring or the like > the pressure ring actuating friction plates, cones or similar axially-movable friction surfaces

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • F16D 43/09 in which the carrier of the centrifugal masses can be stopped IPC+CPC Available in IPC and CPC
  • F16D 43/10 the centrifugal masses acting directly on the pressure ring, no other actuating mechanism for the pressure ring being provided IPC+CPC Available in IPC and CPC
  • F16D 43/12 the centrifugal masses acting on, or forming a part of, an actuating mechanism by which the pressure ring can also be actuated independently of the masses 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