DIFF Subgroup
F16H 61/40 hydrostatic
Introduced: January 1990
Full Title
Control functions within change-speed- or reversing-gearings for conveying rotary motion > Control of exclusively fluid gearing > hydrostatic
IPC and CPC are identically structured here. All 15 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1990.
Child Classifications
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- F16H 61/4061 Control related to directional control valves, e.g. change-over valves, for crossing the feeding conduits since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4069 Valves related to the control of neutral, e.g. shut off valves since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4078 Fluid exchange between hydrostatic circuits and external sources or consumers since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4157 Control of braking, e.g. preventing pump over-speeding when motor acts as a pump since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4174 Control of venting, e.g. removing trapped air since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4183 Preventing or reducing vibrations or noise, e.g. avoiding cavitations since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4192 Detecting malfunction or potential malfunction, e.g. fail safe since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/42 involving adjustment of a pump or motor with adjustable output or capacity since 1990 IPC+CPC Available in IPC and CPC
- F16H 61/44 with more than one pump or motor in operation since 1990 IPC+CPC Available in IPC and CPC
- F16H 61/46 Automatic regulation in accordance with output requirements since 1990 +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F16,2013–2023, worldwide · Source: EPO PATSTAT
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 21,545
- ZAHNRADFABRIK FRIEDRICHSHAFEN DE 9,446
- TOYOTA MOTOR CORPORATION 7,215
- HYUNDAI MOTOR COMPANY KR 6,846
- ROBERT BOSCH DE 6,106
- NTN CORPORATION 5,305
- SKF SE 4,219
- KIA MOTORS CORPORATION KR 3,852
- NSK 3,850
- HONDA MOTOR COMPANY 3,639
Top Applicants (CPC)
Class F16,2013–2023, worldwide · Source: EPO PATSTAT
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 22,817
- ZAHNRADFABRIK FRIEDRICHSHAFEN DE 10,523
- HYUNDAI MOTOR COMPANY KR 7,933
- ROBERT BOSCH DE 7,059
- KIA MOTORS CORPORATION KR 4,867
- SKF SE 4,729
- TOYOTA MOTOR CORPORATION JP 4,111
- FORD GLOBAL TECHNOLOGIES US 3,838
- GM GLOBAL TECHNOLOGY OPERATIONS US 3,575
- TOYOTA MOTOR CORPORATION 3,499