ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,111, issued on June 10, was assigned to CEMBRE S.P.A. (Brescia, Italy).
"Impact tool" was invented by Gualtiero Barezzani (Brescia, Italy) and Gianpaolo Luciani (Brescia, Italy).
According to the abstract* released by the U.S. Patent & Trademark Office: "An impact wrench motor unit includes a motor and an operating switch. A tool-holder shaft rotates about a rotation axis. A transmission unit percussion mechanism connects the motor unit and the tool-holder shaft. A handlebar structure has two handles for manually gripping the wrench. An electronic control system, containing a control board, connected to electric batteries and the operating switch. The electric motor is simultaneo...