Patent US2634064A successfully refreshed from Google Patents.
Patent US3841539A successfully refreshed from Google Patents.
US3841539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collector nozzle for slidable gates
Assignee: United States Steel Corp
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Filing: 1973-03-01
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Granted: 1974-10-15
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Expires: 1993-03-01
Abstract
Abstract A collector nozzle for slidable gates used to control teeming of liquid metal from a bottom-pour vessel. A collector nozzle is a tube which is mounted integrally with the gate and extends downwardly therefrom to confine the stream of metal discharging through an opening in the gate. A conventional collector nozzle is formed of a tube of a refractory which has a relatively high thermal conductivity and which resists erosion, but is subject to having droplets of the teemed metal solidify at its discharge end and form objectionable ''''bugs.'''' The invention provides a removable tip for attachment to the discharge end of the tube. The tip is a refractory of lower thermal conductivity less likely to have ''''bugs'''' form thereon.
Inventors
- 👤 E Shapland
- 👤 J Shapland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:05
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/28; B60; B60W; B60W2510/00; B60W2510/02; B60W2510/0208; B60W2510/0216; B60W2510/10; B60W2510/1015; B60W2510/104
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
In a slidable gate which includes a refractory gate body having an opening, and a collector nozzle mounted integrally with said body and extending downwardly from said opening, said nozzle comprising a tube of refractory which has a relatively high thermal conductivity and which resists erosion during teeming of liquid metal, a metal casing surrounding said tube, and a layer of refractory cement between said tube and said casing, the improvement which comprises a short-length removable and replaceable tip and means attaching said tip to the lower end of said tube, said tip being formed of a ring of refractory of lower thremal conductivity than the refractory of said tube and a metal casing surrounding at least the upper portion of said ring, whereby said tip resists formation of bugs on the discharge end of said nozzle and can be replaced when eroded without replacing the remainder of said tube.
Claim 2
Dependent Claim
150 words
In a slidable gate which includes a refractory gate body having an opening, and a collector nozzle mounted integrally with said body and extending downwardly from said opening, said nozzle comprising a tube of refractory which has a relatively high thermal conductivity and which resists erosion during teeming of liquid metal, a metal casing surrounding said tube, and a layer of refractory cement between said tube and said casing, the improvement which comprises a short-length removable and replaceable tip and means attaching said tip to the lower end of said tube, said tip being formed of a ring of refractory of lower thremal conductivity than the refractory of said tube and a metal casing surrounding at least the upper portion of said ring, whereby said tip resists formation of bugs on the discharge end of said nozzle and can be replaced when eroded without replacing the remainder of said tube.
Claim 3
Dependent Claim
25 words
A gate as defined in claim 1 in which said attaching means includes a band surrounding said tip and the portion of said tube thereabove.
Claim 4
Dependent Claim
29 words
A gate as defined in claim 1 in which said attaching means includes spring clips integral with said second-named casing, said first-named casing having a groove receiving said clips.
Claim 5
Dependent Claim
20 words
A gate as defined in claim 1 in which said attaching means includes interengaging screw threads on the two casings.
Claim 6
Dependent Claim
17 words
A gate as defined in claim 1 in which said tube is formed of a high-alumina refractory.
Claim 7
Dependent Claim
40 words
A gate as defined in claim 5 in which the refractory of said ring has a maximum alumina content of about 70 percent by weight and is selected from the group which consists of fire clay and rebonded fused silica.
Claim 8
Dependent Claim
18 words
A gate as defined in claim 1 in which said tip is of uniform length throughout its circumference.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |