ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,353, issued on June 3, was assigned to ELIVAC Co. LTD (Shanghai) and ELIVAC INC..
"Vacuum system having condenser and root vacuum pump set" was invented by Raymond Zhou Shaw (Shanghai), Jian Wei Zhang (Shanghai) and Xiaoqing Pan (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum system has a condenser and a root vacuum pump set, wherein the condenser is an independent inlet condenser set connected to a generator including an air cooling power generator condenser. A pressure sensor is installed on the independent inlet condenser set for detecting a first input pressure. Air outputted from the independent inlet condenser set is compresse...