ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,445,067, issued on Oct. 14, was assigned to Hilti AG (Schaan, Liechtenstein).
"Electric drive unit for an electric handheld power tool and electric handheld power tool having an electric drive unit" was invented by Christian Augustin (Poettmes, Germany), Xiaodong Zhang (Munich) and Walter Wissmach (Munich).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric drive unit for an electric handheld power tool, having an electric motor with a stator winding and a rotor winding, an actuating circuit for actuating the electric motor and a connection unit for coupling an energy source for driving the electric motor, wherein the stator winding is connected v...