Stopper for use in molten metal handling
US4706944A · kind A · utility
12Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1986 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Feb 10, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D41/186
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A stopper comprising a monoblock refractory body having a gas duct formed longitudinally within the body wherein the said duct extends through the nose of the stopper to an intermediate region within the length of the stopper at which region the duct is sealed by a gas-impermeable plug to prevent gas leakage from the duct through the stopper beyond said region, and wherein said duct and an integral narrow gas supply channel extending from said port to a gas supply inlet on the outside surface of the stopper adjacent the opposite end of the stopper from the nose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.