ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,467,232, issued on Nov. 11, was assigned to SUMITOMO CONSTRUCTION MACHINERY Co. LTD. (Tokyo).
"Excavator" was invented by Riichi Nishikawara (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An excavator includes a lower travelling body, an upper rotating body mounted on the lower travelling body, an excavation attachment attached to the upper rotating body and including a boom, an arm, and a bucket, a control valve serving as a straight-travel valve, and a controller that is configured to control functioning of the control valve. The controller moves the control valve while at least two selected from the boom, the arm, and the bucket are mov...