US Patent Issued to Caterpillar on July 22 for "Hydraulic control system in working machine" (Japanese Inventors)

ALEXANDRIA, Va., July 23 -- United States Patent no. 12,366,054, issued on July 22, was assigned to Caterpillar SARL (Geneva).

"Hydraulic control system in working machine" was invented by Hideki Nakajima (Akashi, Japan) and Koichi Kiyasu (Akashi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "To put new thought to a control method, and to obtain good operability, upon providing a control circuit for option hydraulic actuator in a hydraulic circuit for a working machine. There is provided an option merging oil passage that allows the discharge oil of the first, second hydraulic pumps to be merged thereinto, and the option merging oil passage is provided with an option control valve and a compensator va...