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:
Sep. 08, 1992
Filed:
Dec. 19, 1990
Ullrich Hintzen, Taunusstein-Watzhahn, DE;
Didier-Werke AG, Wiesbaden, DE;
Abstract
An apparatus for closing and/or regulating the discharge or tapping of molten metal from a metallurgical vessel includes a refractory outer pipe member having therethrough a discharge passage defining outer and inner openings and a refractory inner pipe member positioned within the outer pipe member, the inner pipe member having therethrough a passage defining outer and inner openings. A first of the pipe members is movable with respect to a second of the pipe members between open and closed positions. In the opened position, the discharge passages of the pipe members are aligned to define a molten metal discharge channel for passage therethrough in a flow direction of molten metal from an inlet opening to an outlet opening of the discharge channel. The cross-sectional area of the discharge channel is a minimum at the inlet opening and is increased between the inlet opening and the outlet opening.