ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,360, issued on Nov. 11.
"Device and method for adjusting tunnel support force" was invented by Liping Chen (Zhejiang, China), Guogang Ying (Zhejiang, China), Hanhua Zhu (Zhejiang, China), Jiayuan He (Zhejiang, China), Dan Chen (Zhejiang, China) and Yapeng Xing (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tunnel supporting force adjusting device, comprising a fixed component, a movable supporting component and a driving component, wherein the fixed component is connected with section steel; the movable supporting component is connected with the fixed component and used for connecting with a tunnel trunk, and the movable supportin...