ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,404,907, issued on Sept. 2, was assigned to SHIJIAZHUANG WULONG BRAKE Corp. (Hebei, China).
"Drum brake" was invented by Zhengfang Han (Shijiazhuang, China), Wulin Han (Shijiazhuang, China), Bo Wang (Shijiazhuang, China), Xiangle Qiao (Shijiazhuang, China), Yan Zhao (Shijiazhuang, China), Dejun Cui (Shijiazhuang, China) and Guoqi Liu (Shijiazhuang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a drum brake, which includes a brake arm; a brake shoe; a base; and a brake torque detection device; the brake shoe is hinged on the brake arm through a brake shoe shaft, the brake arm is provided with a shaft hole penetra...