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IPC Subgroup
F16H 61/4

hydrostatic

Introduced: January 1990

Last revised: January 2010

Full Title

Control functions within change-speed- or reversing-gearings for conveying rotary motion > Control of exclusively fluid gearing > hydrostatic

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

15 direct subcodes

Child Classifications

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  • F16H 61/4035 Control of circuit flow
  • F16H 61/4061 Control related to directional control valves, e.g. change-over valves, for crossing the feeding conduits
  • F16H 61/4069 Valves related to the control of neutral, e.g. shut off valves
  • F16H 61/4148 Open loop circuits
  • F16H 61/4157 Control of braking, e.g. preventing pump over-speeding when motor acts as a pump
  • F16H 61/4165 Control of cooling or lubricating
  • F16H 61/4174 Control of venting, e.g. removing trapped air
  • F16H 61/4183 Preventing or reducing vibrations or noise, e.g. avoiding cavitations
  • F16H 61/4192 Detecting malfunction or potential malfunction, e.g. fail safe

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