ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,019, issued on Sept. 23, was assigned to TOYOTA JIDOSHA K.K. (Toyota, Japan).
"Torsional vibration reducing device" was invented by Masayuki Ishibashi (Numazu, Japan) and Shinichiro Suenaga (Nagoya, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A torsional vibration reducing device includes: a mass damper configured to reduce ripples of torque by inertia moment of an inertial body; a spring damper configured to reduce ripples of torque to be transmitted between an input-side rotational member and an output-side rotational member by an elastic body being compressed are placed side by side in a predetermined axis direction; and a bolt configur...