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:
Oct. 15, 2002
Filed:
May. 18, 2001
Applicant:
Inventor:
Eric Hanse, Rosselin, BE;
Assignee:
Vesuvius Crucible Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22D 4/108 ;
U.S. Cl.
CPC ...
B22D 4/108 ;
Abstract
The present invention concerns a stopper rod whose gas tightness and rigidity are improved. In particular, the stopper rod of the present. invention has means for maintaining the compression of the sealing gasket ( ′) in contact with the annular sealing surface ( ) of the body of refractory material when the stopper rod is brought to a high temperature. According to one embodiment of the invention, these means are furnished by a sleeve ( ) comprised of a material with a high coefficient of thermal expansion, the dilatation of which maintains the sealing gasket under compression when the stopper rod is brought to a high temperature.