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:
May. 26, 2015
Filed:
Mar. 21, 2012
Manabu Watanabe, Gunma-ken, JP;
Junichi Miyajima, Gunma-ken, JP;
Manabu Watanabe, Gunma-ken, JP;
Junichi Miyajima, Gunma-ken, JP;
YAMADA MANUFACTURING CO., LTD., Kiryu-Shi, Gunma-Ken, JP;
Abstract
The invention allows securing greater discharge pressure and flow rate at high revolutions of an engine in order to secure lubrication and cooling, while reducing discharge pressure and flow rate at low and medium revolutions of the engine in order to improve efficiency. The invention includes a housing; a relief valve; a valve passage; a main discharge flow channel; a main relief flow channel; an auxiliary relief flow channel; a solenoid valve mounted on the auxiliary relief flow channel; and a spring. The solenoid valve is controlled so as to switch between communication and shut-off between the auxiliary relief flow channel and the large-diameter passage section in accordance with an increase or decrease in engine revolutions, and oil in the large-diameter passage section is discharged when the shut-off is implemented.