ALEXANDRIA, Va., March 12 -- United States Patent no. 12,247,373, issued on March 11, was assigned to Nabtesco Corp. (Tokyo).
"Hydraulic drive system and construction machine" was invented by Etsuro Komori (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "The hydraulic drive system includes a hydraulic pump, a plurality of variable displacement actuators, and a control unit. The hydraulic pump discharges a hydraulic fluid. The variable displacement actuators each receive a pressure of the hydraulic fluid discharged from the hydraulic pump to operate corresponding one of a plurality of drive parts. The control unit controls displacement varying parts of the variable displacement actuators. The control uni...