ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,363, issued on Oct. 14, was assigned to Hitachi High-Tech Corp. (Tokyo).
"Liquid feeding pump and liquid feeding method" was invented by Nobuhiro Tsukada (Tokyo), Daisuke Akieda (Tokyo), Yuichiro Hashimoto (Tokyo), Sho Iwasa (Tokyo) and Yusuke Yota (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a technique that enables liquid feeding with small pulsation by reducing the volume of a liquid feeding pump. Disclosed is a liquid feeding pump comprising: a first plunger pump that has a first plunger; a second plunger pump that has a second plunger and is connected to the first plunger pump in series; a pressure sensor...