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PCE
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DIFF Subgroup
F16L 21/02

with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings

CPC: with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)

Full Title

Full titles differ between systems:

IPC:

Joints with sleeve or socket > with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings

CPC:

Joints with sleeve or socket (F16L13/00, F16L17/00, F16L19/00 take precedence; connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/00; specially adapted for pipes of brittle material F16L49/00) > with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00)

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • F16L 21/022 CPC only CPC only
  • F16L 21/025 Rolling sealing rings since 1990 IPC+CPC Available in IPC and CPC
  • F16L 21/03 placed in the socket before connection ( F16L21/025 take precedence) since 1990 IPC+CPC Available in IPC and CPC
  • F16L 21/035 placed around the spigot end before connection ( F16L21/025 take precedence) since 1990 IPC+CPC Available in IPC and CPC
  • F16L 21/05 comprising a first ring being placed on a male part and a second ring in the sleeve or socket since 1995 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