ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,015, issued on Jan. 13, was assigned to Hitachi Construction Machinery Co. Ltd. (Tokyo).
"Work machine" was invented by Ryohei Fukuchi (Tsukuba, Japan), Katsuaki Kodaka (Tsukuba, Japan), Mitsuhiko Kanehama (Kasumigaura, Japan) and Teruki Igarashi (Tsuchiura, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A work machine includes: a first pump and a second pump that are driven by an engine; a hydraulic actuator driven by a hydraulic working fluid supplied from the first pump; a control valve that controls a flow of the hydraulic working fluid supplied to the hydraulic actuator; a solenoid valve that reduces a pressure of the second pump to gener...