ALEXANDRIA, Va., May 19 -- United States Patent no. 12,629,811, issued on May 19, was assigned to Nanjing Chervon Industry Co. Ltd. (Nanjing, China).
"Power tool" was invented by Zhongquan Xu (Nanjing, China), Xiangqing Fu (Nanjing, China) and Yang Wang (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power tool includes a transmission assembly configured to transmit power between a motor and an output assembly to drive an output shaft to oscillate back and forth; and an adjustment assembly for adjusting the transmission assembly. The adjustment assembly is configured to, when a load of the output shaft satisfies a preset value of the adjustment assembly, control the transmission assembly acc...