Structure of piston ring

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United States of America Patent

PATENT NO 9057442
APP PUB NO 20140339778A1
SERIAL NO

14450564

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Abstract

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A structure of a piston ring to be installed in an engine includes a matrix. A laminated intermediate layer is formed on a surface of the matrix from hard chromium (Cr), chromium nitride (CrN) and titanium carbide (TiC) in order, and a diamond-like carbon film (DLC) is coated on an outer periphery of the intermediate layer. Thus, the piston ring is wrapped by a skin with a progressive structure having a gradient distribution of hardness. The structure formed from the diamond-like carbon film provides a low wear rate and a low friction coefficient, while applying a high bonding force to the matrix and making the piston ring have an improved normal service life that meets the related environmental regulations.

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Patent Owner(s)

Patent OwnerAddress
C T I TRAFFIC INDUSTRIES CO LTDNO 10 SHIJIAN ST GUANTIAN DIST TAINAN CITY 720

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lu, Wan-Jie Tainan, TW 3 3

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