US4091971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molten metal nozzle having capillary gas feed
Assignee: Metacon AG
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Filing: 1976-10-28
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Granted: 1978-05-30
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Expires: 1996-10-28
Abstract
Abstract A shaped refractory body having an elongated passage for the feeding of molten metal. At least one conduit is provided extending from the exterior of said body into communication with the passage for the introduction of a gas thereto. The conduit is reduced in diameter at least at its inner end adjacent the passage to the size of a capillary.
Inventors
- 👤 Bernhard Tinnes
- 👤 Paul-Gerhard Mantey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:44
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/50; B22D41/58; B22D41/14; B22D41/22; B22D41/42
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A firebrick for the use in feeding molten metal, comprising a shaped refractory body having an elongated passage for the molten metal, and at least one conduit extending from the exterior of said body into communication with said passage for the introduction of gas thereto, a plug located at the inner end of said conduit, said plug having a bore reduced in diameter at least at its inner end adjacent the passage to the size of a capillary.
Claim 2
Dependent Claim
78 words
A firebrick for the use in feeding molten metal, comprising a shaped refractory body having an elongated passage for the molten metal, and at least one conduit extending from the exterior of said body into communication with said passage for the introduction of gas thereto, a plug located at the inner end of said conduit, said plug having a bore reduced in diameter at least at its inner end adjacent the passage to the size of a capillary.
Claim 3
Dependent Claim
20 words
The firebrick according to claim 1, wherein said reduced diameter capillary tube has a diameter of less than 1 mm.
Claim 4
Dependent Claim
23 words
The firebrick according to claim 1, wherein the plug member is a ceramic body secured within said conduit by a refractory molding compound.
Claim 5
Dependent Claim
23 words
The firebrick according to claim 1, wherein the plug member is conically tapered and said conduit is conformingly shaped to receive the same.
Claim 6
Dependent Claim
15 words
The firebrick according to claim 1, wherein the plug member is force-fit within said conduit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |