US Patent Issued to Wirtgen on Feb. 17 for "Self-propelled earth working machine having twin motors and a working transmission transmitting their power output variably" (German Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,197, issued on Feb. 17, was assigned to Wirtgen GmbH (Windhagen, Germany).

"Self-propelled earth working machine having twin motors and a working transmission transmitting their power output variably" was invented by Christian Berning (Zuplich, Germany), Olaf Gaertner (Linz, Germany) and Christopher Mittelstadt (Neustadt, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A self-propelled earth working machine includes a machine frame, a working apparatus, at least one function apparatus, a drive system including first and second motors, a function transmission and a working transmission. The working transmission is configured to transmit torque...