ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,723,637, issued on Sept. 1, was assigned to Sumitomo Riko Co. Ltd. (Aichi, Japan).
"Fluid-filled cylindrical vibration damping device" was invented by Masaaki Hirano (Aichi, Japan) and Takashi Kume (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a fluid-filled cylindrical vibration damping device, an inner shaft member and an outer shaft member are elastically linked by a main rubber elastic body, and fluid chambers in which a fluid is filled are provided to be in communication with each other through an orifice path. The fluid filled in the fluid chambers is a magnetic functional fluid. The fluid-filled cylindrical vibration damping dev...