ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,688, issued on Dec. 9, was assigned to Zhejiang Jinsheng New Materials Co. Ltd. (Shaoxing, China).
"Pressing pump" was invented by Rongtao Ruan (Shaoxing, China), Qijiang Ruan (Shaoxing, China), Yifeng Cai (Shaoxing, China), Zongyuan Du (Shaoxing, China) and Hongkai Wang (Shaoxing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pressing pump includes a pump case, a piston, a pump rod, and a pressing sleeve, where a pumping cavity is formed within the pump case; the piston is arranged within the pumping cavity and connected to the piston on an inner wall of the pumping cavity; a first end of the pump rod is connected to the piston; the pressin...