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. 04, 1988
Filed:
Feb. 16, 1988
Akira Mizusawa, Yokohama, JP;
Nifco Inc., Yokohama, JP;
Abstract
A check valve is disclosed, which comprises a hollow cylindrical valve body and a pair of substantially semicircular symmetrical valve plates. The valve body has a pair of ear-like bearing projections projecting in a diametrically opposed relation to each other from an open end. The valve plates each have a straight edge with an integral pivot pin provided on one end portion and an integral bearing portion provided at the other end. The two valve plates are joined together by inserting the pivot pin of each of them through the bearing portion of the other. The pivot pins of the joined valve plates are fitted in the bearing projections of the valve body such that the valve plates can be pivotally moved when they are opened and closed.