ALEXANDRIA, Va., June 5 -- United States Patent no. 12,276,087, issued on April 15, was assigned to Hitachi Construction Machinery Co. Ltd. (Tokyo).
"Work machine" was invented by Kento Kumagai (Ami-machi, Japan), Shinya Imura (Toride, Japan), Genroku Sugiyama (Tsuchiura, Japan), Katsuaki Kodaka (Tsukuba, Japan), Yasutaka Tsuruga (Ryugasaki, Japan) and Takaaki Chiba (Kasumigaura, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a work machine which can improve accuracy of control of an actuator when a pressure difference between a hydraulic pump and the actuator is large and the demanded flow rate of the actuator is small. An auxiliary flow rate controller is configured such that an ope...