The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2026
Filed:
May. 26, 2023
Caterpillar Sarl, Geneva, CH;
Caterpillar SARL, Geneva, CH;
Abstract
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 differential pressure of the spool valve to be constant, and electromagnetic proportional valves that output pilot pressure to the spool valve, and a measured data that actually measures the correspondence between the output pilot pressure from the electromagnetic proportional valves and the supply flow from the control valve before the control valve is installed in the working machine is configured to calibrate the corresponding data of the operation amount of the operator and the output current value to the electromagnetic proportional valves.