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, 1992
Filed:
Mar. 19, 1991
Udo Muschner, Tonisvorst, DE;
Manfred Winkelmann, Krefeld, DE;
Herbert Metzger, Duisburg, DE;
Hans Rothfuss, Taunusstein, DE;
Didier-Werke AG, Wiesbaden, DE;
Abstract
A gas flushing device includes a ceramic refractory perforated brick extended through a refractory lining of a wall of a metallurgical vessel. The perforated brick has an outer end having therein a recess opening outwardly of the vessel. A ceramic refractory gas flushing stone is fitted within such recess. The perforated brick has a portion that covers an inner end of the gas flushing stone and that projects therefrom inwardly beyond the vessel lining toward the vessel interior. The projecting portion of the perforated brick has a gas permeable region confronting the inner end of the gas flushing stone. As a result, gas passing through the gas flushing stone to the inner end thereof then passes through the gas permeable region of the projecting portion of the perforated brick into molten metal within the interior of the vessel.