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
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- 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
- ROBERT BOSCH DE 1,281
- SMC CORPORATION JP 865
- HITACHI CONSTRUCTION MACHINERY COMPANY JP 814
- KYB CORPORATION JP 584
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 536
- CATERPILLAR US 532
- FESTO & COMPANY DE 486
- JOHN DEERE US 419
- KAWASAKI HEAVY IND JP 368
- HAMILTON SUNDSTRAND US 368