ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,315, issued on Jan. 20, was assigned to China Railway Sunward Engineering Equipment Co. Ltd. (Guangzhou, China).

"Energy device for shield machines" was invented by Qi Chen (Guangzhou, China) and Yansong Feng (Guangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An energy device for shield machines disclosed by the application comprises: a trolley structure arranged behind the shield machine; a power management system arranged on the trolley structure and electrically connected with the shield machine main body; a solid-state energy cell arranged on the trolley structure; wherein, the solid-state energy cell is connected with the power ma...