Skip to content
Search Classifications
Search for IPC and CPC classification codes or keywords
CPC Subgroup
F15B 9/08

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

Full Title

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)

3 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

  • F15B 9/09 with electrical control means
  • 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
  • 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

Top Applicants

Top 10 applicants by patent filingsfor 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