ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,881, issued on Dec. 2, was assigned to Sumitomo Riko Co. Ltd. (Aichi, Japan).
"Fluid-filled vibration damping device" was invented by Ryota Ishikawa (Aichi, Japan), Yoshihiro Kawabata (Aichi, Japan) and Yorishige Shimizu (Aichi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fluid-filled vibration damping device includes a switching valve arranged inside the fluid passage passing through a partition member to communicate with a main fluid chamber and a sub fluid chamber and protruding from one wall surface toward the other wall surface of the fluid passage that face each other. A gap is provided between the switching valve and the other wall ...