ALEXANDRIA, Va., July 3 -- United States Patent no. 12,343,901, issued on July 1, was assigned to ZF FRIEDRICHSHAFEN AG (Friedrichshafen, Germany).
"Electric drive for a mixer drum" was invented by Eduard Heilig (Friedrichshafen, Germany), Udo Brehmer (Friedrichshafen, Germany) and Raphael Zohner (Huenfelden, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric drive for a mixer drum, including a high-voltage DC voltage power supply to which at least one battery, a power converter and at least one external interface for connecting a stationary electric power supply are connected. The at least one battery is charged only via the at least one external interface, wherein a controller is configured...