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DIFF Subgroup
F16K 17/02

opening on surplus pressure on one side; closing on insufficient pressure on one side (check valves F16K15/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: opening on surplus pressure on one side; closing on insufficient pressure on one side

CPC: opening on surplus pressure on one side; closing on insufficient pressure on one side (check valves F16K15/00)

Full Title

Full titles differ between systems:

IPC:

Safety valves; Equalising valves > opening on surplus pressure on one side; closing on insufficient pressure on one side

CPC:

Safety valves; Equalising valves, > opening on surplus pressure on one side; closing on insufficient pressure on one side (check valves F16K15/00)

Of 6 combined children, 5 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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  • F16K 17/025 CPC only CPC only
  • F16K 17/12 weight-loaded IPC+CPC Available in IPC and CPC
  • F16K 17/164 and remaining closed after return of the normal pressure IPC+CPC Available in IPC and CPC
  • F16K 17/168 combined with manually-controlled valves, e.g. a valve combined with a safety valve 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