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. 03, 2019
Filed:
Apr. 03, 2015
Hitachi Construction Machinery Co., Ltd., Taito-ku, Tokyo, JP;
Tsutomu Udagawa, Ibaraki, JP;
Hiroaki Tanaka, Ibaraki, JP;
Yasutaka Tsuruga, Ibaraki, JP;
Kazunori Nakamura, Ibaraki, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
To provide a hydraulic control system for a working machine with high fuel efficiency and higher versatility to be capable of being adapted to special work. The hydraulic control system for the working machine according to the present invention includes: a plurality of directional control valves (, . . . ), more than one of which is connected in parallel to each of a plurality of hydraulic pumps () to supply hydraulic oil from the hydraulic pump to each of the corresponding actuators (); operating devices () to which an operator inputs manipulated variables; a connection map () storing a precedence order for connection between a plurality of hydraulic pumps and a plurality of directional control valves; and a controller () controlling the connection conditions of the pumps and the actuators on the basis of the connection a¥map and operation signals.