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:
Jul. 23, 2019
Filed:
Feb. 10, 2015
Koganei Corporation, Koganei-shi, Tokyo, JP;
Takeo Yajima, Koganei, JP;
Koganei Corporation, Koganei-shi, Tokyo, JP;
Abstract
A check valve which allows liquid to flow in one direction while preventing liquid from flowing in a direction reverse to said one direction, the check valve comprising: an inflow port allowing liquid to flow therein; an outflow port allowing liquid to flow out thereof; a valve seat provided between the inflow port and the outflow port, the valve seat having a valve hole through which the inflow port communicates with the outflow port; a valve chamber provided between the valve seat and the outflow port; a valve element disposed in the valve chamber, the valve element opening and closing the valve hole; a plurality of holding surfaces located radially outside the valve element, the holding surfaces extending in an axial direction; and an elastic member supported on the holding surfaces and set in the valve chamber, the elastic member applying an elastic force directed toward the valve hole to the valve element.