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:
Apr. 02, 2019
Filed:
Mar. 21, 2017
Yamada Manufacturing Co., Ltd., Kiryu-shi, JP;
Yoshiaki Kawaura, Kiryu, JP;
Masato Izutsu, Kiryu, JP;
Kenichi Fujiki, Kiryu, JP;
Yasuhiko Kan, Kiryu, JP;
Hiroyuki Taguchi, Kiryu, JP;
Yoshiro Umezawa, Kiryu, JP;
Shimpei Iizuka, Kiryu, JP;
YAMADA MANUFACTURING CO., LTD., Kiryu-Shi, Gunma, JP;
Abstract
A hydraulic control apparatus includes: a branch path that branches from a passage connected to an oil pump and equipment to which oil is supplied by the oil pump; an accumulator connected to the branch path to accumulate and discharge high-pressure oil supplied from the branch path; a check valve provided in an oil inlet path through which oil flows into the accumulator; a balance valve unit including a reference pressure chamber, a balance valve body that is biased toward an opening side by an opening compression spring, and a control pressure chamber; and a control solenoid that introduces or discharges the high-pressure oil into or from the control pressure chamber.