US Patent Issued to RONGSHENG MACHINERY MANUFACTURE LTD. OF HUABEI OILFIELD HEBEI on Aug. 26 for "Side door bolt-free ram blowout preventer" (Chinese Inventors)

ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,613, issued on Aug. 26, was assigned to RONGSHENG MACHINERY MANUFACTURE LTD. OF HUABEI OILFIELD HEBEI (Cangzhou, China).

"Side door bolt-free ram blowout preventer" was invented by Jianhua Tang (Cangzhou, China), Hongqi Xu (Cangzhou, China), Shangwen Su (Cangzhou, China), Dongliang Jiang (Cangzhou, China), Weiheng Liao (Cangzhou, China), Zhiming Qu (Cangzhou, China), Zhaochun Meng (Cangzhou, China), Hongjie Wang (Cangzhou, China), Haohao Li (Cangzhou, China), Xue Guo (Cangzhou, China) and Wei Wang (Cangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A side-door-bolt-free ram blowout preventer includes first fixed blocks on two side-faces ...