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:
Sep. 08, 2026
Filed:
Sep. 21, 2023
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
The present invention aims to provide a work machine capable of performing tasks with high precision by preventing the deterioration of speed responsiveness of the hydraulic cylinder driving the working device, as well as preventing the hydraulic cylinder from surging or deviating. To achieve this, the controller calculates the correction value for the target operating pressure of the flow control valve to keep the meter-out pressure of the hydraulic cylinder, measured while driving the hydraulic cylinder to perform a predetermined operation on the working device, within a range from a predetermined first lower limit to a predetermined first upper limit, and corrects the target operating pressure according to the correction value.