ALEXANDRIA, Va., July 9 -- United States Patent no. 12,350,802, issued on July 8, was assigned to Hilti AG (Schaan, Liechtenstein).
"Electropneumatic impact mechanism" was invented by Ernst-Rudolf Lubkert (Landsberg am Lech, Germany), Uto Plank (Freising, Germany) and Jochen Erhardt (Klosterlechfeld, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the guide tube, a connecting rod coupled to the exciter piston, and ...