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. 21, 2021
Filed:
Sep. 26, 2017
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Takaaki Tanaka, Tsuchiura, JP;
Takanobu Ikari, Tsuchiura, JP;
Yasutaka Tsuruga, Ryugasaki, JP;
Takayuki Satou, Kashiwa, JP;
Takashi Sasaki, Kasumigaura, JP;
HITACHI CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;
Abstract
A hydraulic oil resupply device () is provided between first accumulators (F,R) in a manual braking operation circuit () and a second accumulator () in an automatic brake circuit (). The hydraulic oil resupply device () resupplies hydraulic oil accumulated in the second accumulator () to the first accumulators (F,R) at the operating of a manual braking operation by an operator. This configuration can suppress a rising speed of a brake pressure at the manual operation braking from being slow. Accordingly, in a vehicular brake system, it is possible to enhance a braking capability by the manual braking operation and improve the reliability.