ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,774, issued on Nov. 3, was assigned to KOMATSU LTD. (Tokyo).
"Hydraulic valve apparatus" was invented by Yuichi Hishinuma (Tokyo) and Yuusuke Miyamoto (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hydraulic valve apparatus interposed between a hydraulic device and a hydraulic pump and controls supply of oil from the hydraulic pump to the hydraulic device by operating a spool provided in a valve body, in which the valve body includes two pump oil passages connected to separate hydraulic pumps via pump ports, and a plurality of linear motion spools separately provided corresponding to a plurality of linear motion hydraulic devices, the two pu...