US Patent Issued to ELIVAC, China Link Consultant on May 13 for "Parallel connected multiple shaft roots vacuum pump" (Chinese Inventor)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,831, issued on May 13, was assigned to ELIVAC Co. LTD (Shanghai) and China Link Consultant Co. Ltd (Shanghai).

"Parallel connected multiple shaft roots vacuum pump" was invented by Raymond Zhou Shaw (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "A parallel connected multiple shaft roots vacuum pump includes an electric motor (30); a pump body which has N (N is an integers and is greater or equal to 2) parallel pump chambers (11); a bladed rotor set (4) installed within the pump body and including an active bladed rotor (3), and 2N-1 driven bladed rotors (41, 42, 43); wherein the active bladed rotor includes an active driving gear (8); each...