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:
Jul. 07, 1981
Filed:
Nov. 05, 1979
Applicant:
Inventor:
Hugues Zanetta, Metz, FR;
Assignees:
Creusot-Loire, Paris, FR;
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21B / ;
U.S. Cl.
CPC ...
266268 ;
Abstract
Improvements in multiflow refining blastpipes for equipping converters for refining and including at least two concentric tubes 1 and 3, which define between them an annular gap 4 and an annular ring 8 connected by welding onto the outer tube 3, which consist in arranging at the end of the outer tube 3 which is located next to the inlet for the fluids into the blastpipe, a shoulder 12 prolonged by a cylindrical portion 13 which defines an annular chamber 14 for the introduction of a protective fluid, and in arranging the annular ring 8 on the said cylindrical portion 13.