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PCE
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DIFF Subgroup
F15B 9/08

controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (F15B9/06 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: controlled by valves affecting the fluid feed or the fluid outlet of the servomotor

CPC: controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (F15B9/06 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member > with servomotors of the reciprocatable or oscillatable type > controlled by valves affecting the fluid feed or the fluid outlet of the servomotor

CPC:

Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member > with servomotors of the reciprocatable or oscillatable type > controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (F15B9/06 takes precedence)

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

Child Classifications

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  • F15B 9/09 with electrical control means IPC+CPC Available in IPC and CPC
  • F15B 9/10 in which the controlling element and the servomotor each controls a separate member, these members influencing different fluid passages or the same passage IPC+CPC Available in IPC and CPC
  • F15B 9/12 in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F15,2013–2023, worldwide · Source: EPO PATSTAT

  1. ROBERT BOSCH DE 1,079
  2. SCHAEFFLER TECHNOLOGIES & COMPANY DE 980
  3. SMC CORPORATION JP 737
  4. HITACHI CONSTRUCTION MACHINERY COMPANY JP 674
  5. KYB CORPORATION JP 525
  6. CATERPILLAR US 461
  7. FESTO & COMPANY DE 451
  8. ZHEJIANG UNIVERSITY 448
  9. HITACHI CONSTRUCTION MACHINERY COMPANY 442
  10. XUZHOU HEAVY MACHINERY COMPANY 404

Top Applicants (CPC)

Class F15,2013–2023, worldwide · Source: EPO PATSTAT

  1. ROBERT BOSCH DE 1,281
  2. SMC CORPORATION JP 865
  3. HITACHI CONSTRUCTION MACHINERY COMPANY JP 814
  4. KYB CORPORATION JP 584
  5. SCHAEFFLER TECHNOLOGIES & COMPANY DE 536
  6. CATERPILLAR US 532
  7. FESTO & COMPANY DE 486
  8. JOHN DEERE US 419
  9. KAWASAKI HEAVY IND JP 368
  10. HAMILTON SUNDSTRAND US 368