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. 15, 2002
Filed:
Dec. 18, 2000
Kazuhiko Ogawa, Kobe, JP;
Kouichi Hisada, Osaka, JP;
Tomoe Technical Research Company, Osaka, JP;
Abstract
A simplified butterfly valve with low noise in which a cavitation to be generated in a narrowed flow region that is delimited by a valve disc in a valve casing is reduced thereby to control the noise, and the valve can be applied even to a flow line for a fluid containing slurry or foreign particles, and can be used for a fluid flow line through a fluid is flows at a high flow rate. In the butterfly valve with low noise, an enlarged section having the enlarged sectional shape symmetrical relative to the center axis is provided in a downstream side immediately behind a valve seat so as to control or suppress the noise and cavitation which occur around the valve disc, an inner diameter Dy of the enlarged section is made more than 1.3 times a inner diameter D of the piping to which the valve is mounted, and the length X of the enlarged section is made more than 0.5 times the inner diameter D of the piping.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile