IPC Main Group
F16J 9/00 Piston-rings, seats therefor; Ring sealings of similar construction in general
Introduced: September 1968
Last revised: January 2006
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:
- PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
Related Keywords
piston RING(S)
7 direct subcodes
Child Classifications
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- F16J 9/02 L-section rings
- F16J 9/04 Helical rings
- F16J 9/06 using separate springs expanding the rings; Springs therefor
- F16J 9/08 with expansion obtained by pressure of the medium
- F16J 9/1 Special members for adjusting the rings
- F16J 9/12 Details
- F16J 9/26 characterised by the use of particular materials
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