ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,619, issued on Feb. 3, was assigned to JINHUA WEIKE INDUSTRIAL & TRADING Co. LTD (Jinhua, China).
"Multifunctional vacuum pump" was invented by Desheng Wang (Jinhua, China), Heng Wang (Jinhua, China) and Zong Wang (Jinhua, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A multifunctional vacuum pump includes a shell. A vacuum pump assembly and an oil tank assembly are arranged in the shell, the vacuum pump assembly includes an oil pump assembly and a motor assembly, a condenser is arranged below the oil tank assembly, and an oil inlet tube is arranged between the condenser and the oil pump assembly; the oil tank assembly includes an oil tank bod...