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IPC 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

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
Subclass:
GEARING

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 21,545
  2. ZAHNRADFABRIK FRIEDRICHSHAFEN DE 9,446
  3. TOYOTA MOTOR CORPORATION 7,215
  4. HYUNDAI MOTOR COMPANY KR 6,846
  5. ROBERT BOSCH DE 6,106
  6. NTN CORPORATION 5,305
  7. SKF SE 4,219
  8. KIA MOTORS CORPORATION KR 3,852
  9. NSK 3,850
  10. HONDA MOTOR COMPANY 3,639