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:
Jun. 11, 1985
Filed:
May. 15, 1984
Wilhelm Langenfeld, Dusseldorf, DE;
Didier-Werke A.G., Wiesbaden, DE;
Abstract
The invention relates to an arrangement of a blow pipe containing at least one gas permeable refractory plug. The blow pipe is disposed in the wall of a melt-containing vessel for the introduction of gases into the vessel. The blow pipe may be a metallic or ceramic pipe which passes through the vessel wall, and is longitudinally slidable in the vessel wall. Additional pieces of blow pipe in the form of pipe inserts can be added onto the blow pipe, which is in the wall vessel, to replenish the pipe insert material as it is consumed inside the vessel. The arrangement may include mechanical, pneumatic or hydraulic means to advance the pipe inserts into the vessel. The pipe inserts forming the blow pipe may be coated with a suitable lubricant. Alternatively, the pipe inserts may be surrounded by fire-bricks which may contain graphite.