DIFF Subgroup
F16H 61/4078 Fluid exchange between hydrostatic circuits and external sources or consumers
Introduced: January 2010
Full Title
Control functions within change-speed- or reversing-gearings for conveying rotary motion > Control of exclusively fluid gearing > hydrostatic > Fluid exchange between hydrostatic circuits and external sources or consumers
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
IPC defines codes here since 2010.
Child Classifications
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- F16H 61/4104 Flushing, e.g. by using flushing valves or by connection to exhaust since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4131 Fluid exchange by aspiration from reservoirs, e.g. sump since 2010 IPC+CPC Available in IPC and CPC
- F16H 61/4139 Replenishing or scavenging pumps, e.g. auxiliary charge pumps since 2010 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