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. 08, 1989
Filed:
Dec. 05, 1988
Mitsuru Ando, Gifu, JP;
Toshikazu Takasu, Gifu, JP;
Akechi Ceramics Co., Ltd., Gifu, JP;
Abstract
A molten steel pouring nozzle comprising an upper nozzle made of a refractory, an upper end portion of which is to be inserted into a bottom wall of a molten steel receiving vessel; a lower nozzle made of a refractory, having, on an upper end portion thereof, a recess for receiving a lower end portion of the upper nozzle; and an open air shutoff means for preventing an open air from penetrating through an interface between the lower end portion of the upper nozzle and the recess of the lower nozzle. The open air shutoff means comprises a steel shell covering the upper end portion of the lower nozzle and having on a side surface thereof an inert gas feed port; an annular equalizing chamber, provided between the upper end portion of the lower nozzle and the side surface of the steel shell, communicating with the inert gas feed port of the steel shell; and a plurality of grooves formed between the upper end surface of the lower nozzle and the upper surface of the steel shell, one end of each of the grooves communicating with the annular equalizing chamber, and the other end thereof communicating with the recess of the lower nozzle.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile