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:
Mar. 05, 2024
Filed:
Dec. 13, 2019
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Akira Kanazawa, Tokyo, JP;
Hidekazu Moriki, Tokyo, JP;
Takaaki Chiba, Tsuchiura, JP;
Shinya Imura, Tsuchiura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A construction machine is provided that can cause each hydraulic actuator to accurately operate according to operation by an operator in combined operation in which a hydraulic fluid of a hydraulic pump is subjected to flow dividing and is supplied to plural hydraulic actuators. A controller, in a case of determining that combined operation is being carried out, controls a regulatorin such a manner that the delivery flow rate of a hydraulic pumpbecomes larger than the total target flow rate of plural hydraulic actuators, and, and controls the respective opening amounts of plural directional control valves, andin such a manner that the difference between the respective target flow rates of the plural hydraulic actuators and the respective inflow flow rates of the plural hydraulic actuators sensed by velocity sensorstobecomes small.