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CPC Subgroup
F16H 61/4078

Fluid exchange between hydrostatic circuits and external sources or consumers

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

4 direct subcodes

Child Classifications

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  • F16H 61/4096 with pressure accumulators
  • F16H 61/4104 Flushing, e.g. by using flushing valves or by connection to exhaust
  • F16H 61/4131 Fluid exchange by aspiration from reservoirs, e.g. sump
  • F16H 61/4139 Replenishing or scavenging pumps, e.g. auxiliary charge pumps

Top Applicants

Top 10 applicants by patent filingsfor class F16, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SCHAEFFLER TECHNOLOGIES & COMPANY DE 22,817
  2. ZAHNRADFABRIK FRIEDRICHSHAFEN DE 10,523
  3. HYUNDAI MOTOR COMPANY KR 7,933
  4. ROBERT BOSCH DE 7,059
  5. KIA MOTORS CORPORATION KR 4,867
  6. SKF SE 4,729
  7. TOYOTA MOTOR CORPORATION JP 4,111
  8. FORD GLOBAL TECHNOLOGIES US 3,838
  9. GM GLOBAL TECHNOLOGY OPERATIONS US 3,575
  10. TOYOTA MOTOR CORPORATION 3,499