ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,806, issued on Oct. 28, was assigned to HITACHI CONSTRUCTION MACHINERY Co. LTD. (Tokyo).
"Work machine" was invented by Teruki Igarashi (Tsuchiura, Japan), Akihiro Narazaki (Tsukuba, Japan) and Shuuichi Meguriya (Ishioka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A work machine includes a work device having a boom, an arm, and work equipment and a controller that sets a target surface, and calculates a work equipment-to-target surface distance on the basis of signals from a position sensor and a posture sensor, and carries out control to decelerate the arm to keep the work equipment from excavating ground beyond the target surface when th...