ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,220,801, issued on Feb. 11, was assigned to Hilti AG (Schaan, Liechtenstein).
"Impact mechanism arrangement" was invented by Uto Plank (Freising, Germany), Ulrich Mandel (Buchloe Honsolgen, Germany) and Josef Funfer (Koenigsbrunn, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "Hammer drill and/or chipping hammer having a drive motor, an impact mechanism and a tool fitting for fitting a tool, wherein the impact mechanism has an anvil that is axially displaceable in an anvil guide and acts on the tool, wherein the impact mechanism has an idle-strike damper element and a rebound-strike damper element, which are formed in one piece with one another ...