US Patent Issued to Wirtgen on March 18 for "Earth working machine having a shiftable transmission between a drive motor and a rotatable working apparatus" (German Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,166, issued on March 18, was assigned to Wirtgen GmbH (Windhagen, Germany).

"Earth working machine having a shiftable transmission between a drive motor and a rotatable working apparatus" was invented by Christian Berning (Zulpich, Germany), Tobias Stinner (Weyerbusch, Germany), Cyrus Barimani (Konigswinter, Germany) and Hardy Wilhelmi (Dattenberg, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "An earth working machine (10), encompassing a drive motor (42) and a working apparatus (22) drivable by the drive motor (42) so as to move rotationally, the drive motor (42) being connected to the working apparatus (22), for transfer of a torque, wit...