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:
May. 19, 1981
Filed:
Jun. 12, 1979
Didier-Werke AG, Wiesbaden, DE;
Abstract
An electrically heated valve element for sliding type valve joints in the outlet of a molten metal vessel has an electrical heating conductor disposed predominately in the outlet closing surface section of the valve element so that when moved to the casting position where the molten metal flow passage aligns with the flow passage from the vessel, the outlet closing surface of the element is maintained at a uniformly high temperature so that any cooling down of the outlet closing surface is avoided. The valve element is made by embedding the heating conductor which is air annealed nichrome wire in spiral form, into the refractory material of the valve element by vibration, the embedding mass being free of organic substances, carbon, sulfur, metallic iron, alkalies and/or electrically conductive substances.