ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,903, issued on March 3, was assigned to KYB Corp. (Tokyo).
"Fluid pressure control device" was invented by Shunsuke Kubo (Gifu, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A load holding mechanism includes a switching valve configured to switch an operation of an operation check valve, and a relief valve configured to open when pressure in a load-side pressure chamber reaches predetermined pressure, and the switching valve includes a drain chamber provided on an opposite side of a spring chamber with a spool interposed therebetween, a drain passage connected to the relief valve and connected to at least one of the drain chamber and the spri...