ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,864, issued on Jan. 13, was assigned to Andreas Stihl AG & Co. KG (Waiblingen, Germany).
"Work apparatus" was invented by Alexander Haertel (Ludwigsburg, Germany), Fabian Willems (Stuttgart, Germany), Gregor Pfister (Waiblingen, Germany) and Benjamin Barth (Rosengarten, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A work apparatus has a tool, which can be driven in a rotating manner around a rotational axis. The work apparatus has a protective hood extending over at least a part of the periphery of the tool. The protective hood is attached to a housing part of the work apparatus. At least two rotation locks for the protective hood are arra...