ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,780,336, issued on Nov. 3, was assigned to DALIAN UNIVERSITY OF TECHNOLOGY (Dalian, China).

"Obstacle-surmounting walking device" was invented by Xiaoxu Wang (Dalian City, China), Jinglong Wang (Dalian City, China) and Hui Liu (Dalian City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An obstacle-surmounting walking device is provided, and belongs to the technical field of walking devices. The obstacle-surmounting walking device includes a contact wheel, a driving load-bearing wheel, a free climbing wheel, a climbing drive disc, a climbing drive disc driving disengagement leaf, and a driving device. Contact wheel climbing teeth are arranged on co...