ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,875, issued on June 24, was assigned to TSUBAKIMOTO CHAIN Co. (Osaka, Japan).
"Silent chain and chain drive system" was invented by Ryosuke Nanri (Osaka, Japan) and Kosuke Yabuki (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "To provide a high-strength silent chain and a chain drive system. The silent chain is made up of a plurality of link plates pivotably coupled together with connecting pins. The plurality of link plates include two or more types of link plates having different shapes. The link plates of different shapes are designed to have pitch lines at the same height when the link plates sit on a sprocket. The chain drive syste...