ALEXANDRIA, Va., March 3 -- United States Patent no. 12,565,760, issued on March 3, was assigned to Hitachi Construction Machinery Co. Ltd. (Tokyo).
"Work machine" was invented by Hiroaki Amano (Tsukuba, Japan), Kento Kumagai (Ami-machi, Japan), Hiroto Oohira (Kasumigaura, Japan), Shinji Nishikawa (Kasumigaura, Japan), Akihiro Narazaki (Tsukuba, Japan) and Katsuaki Kodaka (Tsukuba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A work machine includes: a main circuit that supplies a working fluid from a pump to an actuator; a pilot circuit that introduces part of the working fluid from the pump, to a pilot pressure receiving section of a control valve; a bleed-off passage that connects the pump and a t...