ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,342, issued on July 1, was assigned to KOSMEK LTD. (Japan).
"Check valve device" was invented by Akira Arisato (Kobe, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a check valve device having a structure with which pressurized fluid is less likely to leak from a flowpath blocked by a valve. A flowpath is formed in a block, and a main valve and a sub-valve are provided in series along the flowpath. A primary-side chamber, an intermediate chamber, and a secondary-side chamber, which form a section of the flowpath, are formed in that order from the one end of the flowpath to the other end thereof. The main valve and the sub-valve are ...