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:
Oct. 21, 1986
Filed:
Oct. 04, 1985
Yutaka Yamada, Tsushima-shi, Aichi-ken, JP;
Nippondenso Co., Ltd., Kariya, JP;
Other;
Abstract
A check valve assembly of the quick shutoff type equipped with an auxiliary valve of the slow closure type, wherein the check valve assembly comprises a primary valve plate arranged within a valve housing to open and close a primary cylindrical bore in the valve housing, and a swingably pressure receiving plate secured at one end thereof to the primary valve plate to be applied with a hydraulic pressure, and wherein the auxiliary valve comprises a cylindrical valve casing mounted on a portion of the primary valve plate, the valve casing being formed with a secondary cylindrical bore and formed at the peripheral wall with a radial hole which is arranged at the down stream of the primary valve plate, a cup-shaped cylinder coupled with one end of the valve casing, a piston slidably disposed within the cylinder to form a chamber in the cylinder, flow restriction means arranged to provide a fluid communication between the chamber and the interior of the valve casing, a valve element slidably disposed within the valve casing to control the quantity of hydraulic fluid flowing through the secondary cylindrical bore and the radial port, and a valve rod arranged to interconnect the piston and the valve element and being engaged at one end thereof with the pressure receiving plate.