ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,634, issued on Feb. 3, was assigned to Caterpillar SARL (Geneva).
"Calibration system in hydraulic system" was invented by Hideki Nakajima (Akashi, Japan), Koichi Kiyasu (Akashi, Japan) and Toshikazu Koga (Akashi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Problem: Calibration to make the correspondence relationship between the operation amount of the operator and the supply flow rate to the hydraulic actuator be a preset setting relationship is made easy. Solution: The control valve that controls the supply flow rate to the hydraulic actuator is configured with a spool valve, a pressure compensation valve that maintains a front and rear di...