ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,978, issued on June 10, was assigned to Hitachi Construction Machinery Co. Ltd (Tokyo).
"Work machine" was invented by Kento Kumagai (Ami-Machi, Japan), Shinya Imura (Toride, Japan), Yasutaka Tsuruga (Ryugasaki, Japan), Takaaki Chiba (Kasumigaura, Japan), Shinjirou Yamamoto (Ami-Machi, Japan), Hiroaki Amano (Tsukuba, Japan), Shinji Nishikawa (Kasumigaura, Japan) and Akihiro Narazaki (Tsukuba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention intends to provide a work machine that can execute speed control of an actuator and torque control of a swing motor by a simple configuration at the time of combined operation to simulta...