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:
Aug. 14, 2012
Filed:
Mar. 13, 2009
Arito Mizobe, Fukuoka, JP;
Mitsunobu Sato, Fukuoka, JP;
Takahiro Yasuda, Fukuoka, JP;
Krosakiharima Corporation, Fukuoka, JP;
Abstract
The present invention is directed to creating a less-energy loss or smooth (constant) molten steel flow with a focus on a configuration of a bore of an upper nozzle, so as to provide an upper nozzle formed with a bore having a configuration capable of to suppress deposit formation. For this purpose, in an upper nozzlefor allowing molten steel to flow therethrough, a radius of an upper end of a boreis set to be equal to or greater than 1.5 times a radius of a lower end of the bore, and a bore surfaceis formed in a vertical cross-sectional configuration represented by log(r(z))=(1/n)×log((H+L)/(H+z))+log(r(L))(n=1.5 to 6).