US Patent Issued to KOMATSU on March 25 for "Control method for tunnel excavation device and tunnel excavation device" (Japanese Inventor)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,863, issued on March 25, was assigned to KOMATSU LTD. (Tokyo).

"Control method for tunnel excavation device and tunnel excavation device" was invented by Shigeaki Ashikaga (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A control method for a tunnel excavation device is provided. While grippers of a rear body section protrude outward and the rear body section is secured to an inner wall of a tunnel, a plurality of thrust cylinders are controlled so that a front body section is made to move forward along a movement prediction line set based on a tunnel excavation plan line. While grippers of the front body section protrude outward and the fron...