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:
Dec. 08, 2020
Filed:
Apr. 08, 2015
Furuya Metal Co., Ltd., Tokyo, JP;
Akinori Hoshino, Toyko, JP;
FURUYA METAL CO., LTD., Tokyo, JP;
Abstract
A stirrer for glass melting which can be used over a prolonged life expectancy, while maintaining a high strength, even in an environment exposed to a high temperature and an oxygen-containing gas atmosphere for a long period of time, and can prevent the air bubbles from being mixed into the glass melt. A stirrer for glass melting is made of iridium or an iridium-based alloy, and has a rotary shaft and a stirring part, a surface region Sof the surface of the rotary shaft above the stirring part is covered with a cylindrical cover, the cover has a two-layer structure in which an outer layer made of platinum or a platinum rhodium alloy and an inner layer made of platinum or a platinum rhodium alloy containing metal species are joined together, and oxide particles of metal species are precipitated in a dispersed state on a surface of the inner layer on an opposite side to a surface adjacent to the outer layer, wherein the stirrer for glass melting has a pipe made of iridium or an iridium-based alloy which surrounds at least the surface region Sof the cover from the lower end of the cover to a predetermined height at an interval.