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:
Apr. 03, 2007
Filed:
Jun. 12, 2002
François-noël Richard, Vicherey, FR;
Eric Hanse, Henri Bosselin, FR;
François-Noël Richard, Vicherey, FR;
Eric Hanse, Henri Bosselin, FR;
Vesuvius Crucible Company, Wilmington, DE (US);
Abstract
The present invention concerns a mono-block stopper adapted to deliver gas during pouring of molten metal comprising a stopper body having an internal chamber () and a gas discharge port (), a bore () connecting the internal chamber () to the gas discharge port (), calibrating means () being provided in the bore () to provide a restricted path. This stopper is characterised by the fact that the calibrating means comprise a rod () having at least one axially-extending gas passages therealong, the gas passage(s) having a section such as to offer a predetermined resistance to flow. The stopper of the invention is far more reliable and can be easily adapted to various operational parameters.