Patent · US Expired

Refractory discharge device with separate external reinforcement member

US5092500A · kind A · utility

7Cited by

3References

20Claims

0Family size

Assignee

Didier-Werke AG · DE

Inventors

Udo Weber · Hochheim, DE
Ernst Luhrsen · Schlangenbad, DE
Albert Ott · Niedernhausen, DE
Steve Lee · Conway, US

Key dates

Filing date	Feb 7, 1991
Grant date	Mar 3, 1992
Priority date	—
Expiry date	Feb 7, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22D41/505
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A refractory discharge device includes an immersion nozzle formed substantially of carbon-bonded magnesium oxide or carbon-bonded aluminum oxide or fused quartz. The immersion nozzle has therethrough a discharge passage and has an outer surface and an outlet end. An external reinforcement member is formed entirely separately from the immersion nozzle from a zirconium oxide material that is directly bonded without any carbon and by burning at a high temperature. The external reinforcement member is attached to the outer surface of the outer surface of the immersion nozzle at a position such that during use the external reinforcement member will extend above and below a casting powder covering of molten metal into which the refractory discharge device will be immersed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.