US Patent Issued to Asimco Shuanghuan Piston Ring (yizheng) on July 1 for "Piston ring with hard plating, and preparation method therefor" (Chinese Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,336, issued on July 1, was assigned to Asimco Shuanghuan Piston Ring (yizheng) Co. Ltd. (Yizheng, China).

"Piston ring with hard plating, and preparation method therefor" was invented by Kaishun Li (Yizheng, China), Qianxi Liu (Yizheng, China), Yueting Zhou (Yizheng, China) and Guanfei Shi (Yizheng, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A piston ring with a hard plating and a preparation method therefor are provided. An OD surface of the piston ring includes an interlayer, a gradient metal nitride layer and a DLC repetitive unit layer sequentially from bottom to top; one DLC unit layer in the DLC repetitive unit layer sequentially incl...