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. 15, 2022
Filed:
Sep. 27, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Shu Shirato, Ibaraki, JP;
Yoshihiro Shirakawa, Ibaraki, JP;
Akihiro Narazaki, Ibaraki, JP;
Katsuaki Kodaka, Ibaraki, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
In a specific state where the raising operation of a boomand the swing operation of an upperstructureare performed at the same time to supply a hydraulic oil from a first pumpto a cylinderthrough a first valve, and to supply the same from a second pumpto a motorthrough a second valve, a controlleroutputs the command current for opening a valve, and supplies a part of the hydraulic oil supplied to the motorfrom the second pumpto the cylinderthrough the third valvewhen the motordoes not reach a steady swing state, and outputs a command current for closing the valvewhen the motoris in the steady swing state.