IPC Subgroup
F16F 13/3 comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids
Introduced: January 1995
Last revised: January 2006
Full Title
Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs > comprising both a plastics spring and a damper, e.g. a friction damper > characterised by adjusting or regulating devices responsive to exterior conditions > comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids
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:
- SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
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