ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,256, issued on Sept. 16, was assigned to Nanjing Chervon Industry Co. Ltd. (Nanjing, China).
"Impact tool" was invented by Shuai Chen (Nanjing, China), Hongtao Ke (Nanjing, China), Yang Li (Nanjing, China), Zhiwei Feng (Nanjing, China), Longxiang Liu (Nanjing, China), Yongkang Wu (Nanjing, China) and Guang Li (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact tool includes an output shaft for outputting torque, where the tightening torque of the output shaft to a workpiece is greater than or equal to 700 foot-pounds; and an impact assembly that provides an impact force to the output shaft. A main shaft ball groove includes a f...