F16J9/066 - CPC Classification Index

ClassID:

151750 ⎘

F16J9/066 - CPC Classification

Classification description:

Piston-rings, e.g. non-metallic piston-rings , seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging; Rings with a flat annular side rail Spring expander from sheet metal

Sub-classes:

F16J9/067 » {corrugated in the radial direction} 5
F16J9/068 » {corrugated in the axial direction} 33
F16J9/069 » {with a "C"-shaped cross section along the entire circumference} 4

Recent Application in this class:

20210003217

Spacer spring for a three-part oil scraper ring and three-part oil scraper ring having said spacer spring

20200378498

Play-free oil scraper ring

20200072352

Oil scraper ring spring for an oil scraper ring and oil scraper ring

20190113139

Multiple-piece oil stripping piston ring with reduced friction

20180051806

Combined oil ring

20170175893

Combination oil ring

20150184748

Oil control ring assembly

20150184747

Combined oil control ring

20150145218

Combined oil control ring

20140062030

Combined oil ring

20140021686

Multi-piece oil ring

20100065008

Pistons for internal combustion engines

20060273525

Multipart oil wiping ring for pistons of internal combustion engines