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:
Jan. 28, 2003
Filed:
Jan. 26, 2001
Kiyoshi Ouchi, Tokyo, JP;
Masaru Sato, Tokyo, JP;
Ebara Corporation, Tokyo, JP;
Abstract
The present invention provides a ball check valve in which the area of a channel leading from a ball chamber to a discharge-side channel can be increased, and the adhesion of a ball to a valve seat surface is satisfactory even when the ball check valve is used in a horizontal posture. In the ball check valve having a ball ( ) movably housed in a ball chamber ( ) provided inside a valve casing ( ), two or more rail-like ridges ( ) protruding toward the interior of the ball chamber to guide the ball ( ) are provided on a peripheral wall ( ) demarcating the ball chamber ( ). Furthermore, valve seats ( ) constituted separately from the valve casing ( ) are mounted, respectively, on the inflow side and the discharge side of the valve casing ( ).