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:
Jan. 17, 2023
Filed:
Jul. 27, 2018
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Takaaki Tanaka, Ushiku, JP;
Takanobu Ikari, Tsuchiura, JP;
Yasutaka Tsuruga, Ryugasaki, JP;
Takayuki Sato, Kashiwa, JP;
Takashi Sasaki, Kasumigaura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
An automatic brake subsystem () includes second accumulators (F,R), a front second line () and a rear second line (), second brake valves (F,R), a first solenoid switching valve (), first shuttle valves (F,R), and a controller. A second solenoid switching valve (F) and a pressure sensor (F) are provided in the front second line (), and a second solenoid switching valve (R) and a pressure sensor (R) are provided in the rear second line (). In a case where it is determined that each of the second brake valve (F,R) is not performing normally based upon a pressure of a hydraulic fluid detected by each of the pressure sensors (F,R) and an operating signal supplied to the first solenoid switching valve () or each of the second brake valves (F,R), a controllerperforms control to switch each of the second solenoid switching valves (F,R).