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. 09, 1991
Filed:
Mar. 23, 1990
Takeshi Yamamoto, Nishinomiya, JP;
Toshiharu Tanaka, Daitoh, JP;
Tomoe Technical Research Company, Ohsaka, JP;
Abstract
A butterfly valve is described, including: a valve body made from synthetic material and having an internal cylindrical fluid passage; a movable disk valve disposed in the valve body for controlling the opening and closing of the fluid passage; a seated ring made from elastic material inserted between the valve body and the disk valve for closing the fluid passage when the disk valve is in a closed position; a shaft hole formed in the valve body into which a stem is inserted; a shaft cylinder formed to extend outwardly from an outer circumference of the valve body in corresponding with the shaft hole, the stem being inserted into the shaft cylinder and holding the valve axially, the valve body being divided along at least one division line formed across the fluid passage and being composed of plural divided parts, each divided part being joined at a joining surface extending circumferentially to form one complete valve body and being produced with a plurality of cavity portions in order to achieve light weight and required thickness, and the seated ring being fitted into an inner circumference of the valve body.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile