ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,135, issued on Sept. 16, was assigned to Hitachi Construction Machinery Tierra Co. Ltd. (Koka, Japan).
"Electrically driven hydraulic work machine" was invented by Kiwamu Takahashi (Moriyama, Japan), Seiichi Kihara (Koka, Japan), Yuichi Ogawa (Koka, Japan) and Takeshi Ishii (Hino-cho, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a...