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. 13, 2004
Filed:
Mar. 11, 2002
Hiroyuki Miyamoto, Kitakyushu, JP;
Koji Kido, Kitakyushu, JP;
Krosakiharima Corporation, Fukuoka, JP;
Abstract
An immersion nozzle for steel continuous casting has two delivery ports opposing each other and has one or more bore reduced portions above the delivery ports in a bore. A bore reduced portion closest to the delivery ports has an elliptical horizontal section, with an elongate direction of the ellipse nearly parallel with a direction of the delivery ports. The bore elliptic reduced portion may include another bore reduced portion second closest to the delivery port, wherein a lower end surface of the bore elliptic reduced portion closest to the delivery port can be 0.3H-2H of a delivery port height H of from an upper end of the delivery port, the spacing to the upper bore elliptic reduced portion being 0.3D-2D of a diameter D of the bore, and moreover a length of each bore reduced portion being 0.5D-5D.