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:
Feb. 13, 2024
Filed:
Mar. 03, 2022
Shinagawa Refractories Co., Ltd, Tokyo, JP;
Hiroyasu Niitsuma, Tokyo, JP;
Keigo Fujita, Tokyo, JP;
SHINAGAWA REFRACTORIES CO., LTD, Tokyo, JP;
Abstract
The cross-sectional shape of a flow passageis circular in a first portion; the shape of a flow passageis a flat shape in a second portion; in a connecting portion, the shape of a flow passageis a shape continuously connecting the flow passageof the first portionand the flow passageof the second portion; an openingis provided on the distal end side of the second portionand extends along a plane direction of the flat shape; and assuming that a maximum value of a cross-sectional area of the flow passagein the first portionis given by S, that a maximum value of a cross-sectional area of the flow passagein the second portionis given by S, and that a minimum value of a cross-sectional area of the flow passagewithin a range of 20% of a length Lof the first portionfrom a boundary portionbetween the first portionand the connecting portiontoward the upstream side is given by S, Sis greater than S, the ratio S/Sbetween Sand Sis 1.10 or more and 2.00 or less, and the ratio S/Sbetween Sand Sis 1.20 or more and 2.50 or less.