ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,148, issued on July 29, was assigned to NOK Corp. (Japan).
"Torsional damper" was invented by Nobuhiko Narita (Tottori, Japan) and Koki Shionuma (Tottori, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A torsional damper is provided having a hub in which a boss adapted to be fixed to a rotating shaft, such as a crankshaft of an engine, and an annular rim are integrally provided via a plurality of stays, and an annular vibration ring connected to an outer circumferential surface of the rim via an elastic body. The stays have a circumferential width dimension that does not exceed one-quarter of the wavelength of the axial resonant frequency of t...