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PCE
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DIFF Subgroup
F16D 3/223

the rolling members being guided in grooves in both coupling parts

Introduced: January 1990

Full Title

Full titles differ between systems:

IPC:

Yielding couplings, i.e. with means permitting movement between the connected parts during the drive > Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts > one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members > the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts > the rolling members being guided in grooves in both coupling parts

CPC:

Yielding couplings, i.e. with means permitting movement between the connected parts during the drive (couplings disconnectable simply by axial movement F16D1/10; slip couplings F16D7/00) > Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts > one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members (F16D3/18, F16D3/24 take precedence) > the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts > the rolling members being guided in grooves in both coupling parts

CPC subdivides this area 3x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

Note: 8 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F16D 2003/22303 2nd only CPC only CPC only
  • F16D 2003/22306 2nd only CPC only CPC only
  • F16D 2003/22309 2nd only CPC only CPC only
  • F16D 2003/22313 2nd only CPC only CPC only
  • F16D 2003/22316 2nd only CPC only CPC only
  • F16D 2003/2232 2nd only CPC only CPC only
  • F16D 2003/22323 2nd only CPC only CPC only
  • F16D 2003/22326 2nd only CPC only CPC only
  • F16D 3/2233 where the track is made up of two curves with a point of inflexion in between, i.e. S-track joints since 2011 IPC+CPC Available in IPC and CPC
  • F16D 3/2237 where the grooves are composed of radii and adjoining straight lines, i.e. undercut free [UF] type joints since 2011 IPC+CPC Available in IPC and CPC
  • F16D 3/229 Prismatic coupling parts having each groove centre-line lying on planes parallel to the axis of the respective coupling part (F16D3/224, F16D3/226 take precedence) since 1990 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