ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,766,626, issued on Oct. 20, was assigned to CRRC QINGDAO SIFANG Co. LTD. (Qingdao, China).
"Welding device for suppressing welding hot cracks, and welding system" was invented by Xiaohui Han (Qingdao, China), Shuaizhen Li (Qingdao, China), Zhiyi Zhang (Qingdao, China), Peng Wang (Qingdao, China), Zhendong Mao (Qingdao, China) and Guolong Ma (Qingdao, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A welding apparatus comprising a first fixing plate and a second fixing plate arranged at an interval; a gas-electric slip ring is connected to the side of the first fixing plate facing the second fixing plate; a hollow shaft drive unit is connected to th...