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 61/4008 Control of circuit pressure
- F16H 61/4035 Control of circuit flow
- F16H 61/4043 Control of a bypass valve
- 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 61/4078 Fluid exchange between hydrostatic circuits and external sources or consumers
- 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
- F16H 61/42 involving adjustment of a pump or motor with adjustable output or capacity
- F16H 61/44 with more than one pump or motor unit in operation
- F16H 61/46 Automatic regulation in accordance with output requirements
Top Applicants
Top 10 applicants by patent filingsfor 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