Patent US3861571A successfully refreshed from Google Patents.
US3861571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladle flow control safety device for continuous casting machine
Assignee: Individual
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Filing: 1972-06-19
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Granted: 1975-01-21
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Expires: 1992-06-19
Abstract
Abstract A continuous casting machine for molten steel requires a carefully controlled hydraulic head of molten steel for proper operation. The hydraulic head is provided by a tundish atop the continuous casting machine. The tundish in turn is supplied by a bottom pour ladle placed directly above the tundish and having an internal adjustable stopper rod for controlling the flow through the bottom tap or nozzle of the ladle. The invention comprises an auxiliary powered device which can move a separate external funnel or nozzle tightly up against the bottom of the ladle about the bottom tap to reduce the flow of metal from the ladle and thereby prevent overflow of the tundish with concurrent loss of molten metal when the stopper rod and nozzle of the ladle fail to operate and the flow from the ladle would otherwise exceed the requirements of the continuous casting machine.
Inventors
- 👤 Arch V Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:32
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/50; B22D41/56
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
89 words
A molten metal flow control safety device for use with a continuous casting machine supplied from a bottom tap ladle; comprising support means positioned adjacent the ladle bottom, linear extension means mounted on and movable on the support means to extend under the ladle upon actuation, means accommodating lateral positioning of said extension means, flow control means mounted on said extension means, and means providing vertical positioning of said flow control means adapted upon actuation to engage said flow control means with the ladle bottom about the bottom tap.
Claim 2
Dependent Claim
89 words
A molten metal flow control safety device for use with a continuous casting machine supplied from a bottom tap ladle; comprising support means positioned adjacent the ladle bottom, linear extension means mounted on and movable on the support means to extend under the ladle upon actuation, means accommodating lateral positioning of said extension means, flow control means mounted on said extension means, and means providing vertical positioning of said flow control means adapted upon actuation to engage said flow control means with the ladle bottom about the bottom tap.
Claim 3
Dependent Claim
35 words
The device of claim 1 wherein said flow control means comprises a cup circumferentially engageable about the bottom tap and containing a nozzle adapted to resist the temperature and erosive effects of flowing molten metal.
Claim 4
Dependent Claim
23 words
The device of claim 2 wherein said flow control means include a refractory stopper adapted for insertion into the nozzle prior to actuation.
Claim 5
Dependent Claim
23 words
The device of claim 1 wherein said vertical positioning means includes fluid powered rotatable hook means adapted to support the flow control means.
Claim 6
Dependent Claim
19 words
The device of claim 4 wherein said flow control means includes trunnions adapted to rest in said hook means.
Claim 7
Dependent Claim
20 words
The device of claim 4 wherein said hook means includes shield means adapted to protect the fluid powered actuation means.
Claim 8
Dependent Claim
15 words
The device of claim 1 wherein said extension means is actuated by fluid powered means.
Claim 9
Dependent Claim
29 words
The device of claim 1 wherein said lateral positioning means includes a vertical pivot on said support means to allow horizontal rotational positioning relative to a bottom tap ladle.
Claim 10
Dependent Claim
23 words
The device of claim 8 wherein said device is slightly horizontally unbalanced toward Said flow control means at said vertical pivot when retracted.
Claim 11
Dependent Claim
23 words
The device of claim 8 wherein said device is slightly horizontally unblanced toward said flow control means at said vertical pivot when extended.
Claim 12
Dependent Claim
28 words
The device of claim 1 wherein said flow control means comprises a refractory lined cup adapted to provide a complete stoppage of flow from a bottom tap ladle.
Claim 13
Dependent Claim
64 words
A molten metal flow control safety device comprising support means mounted upon a vertical pivot, linear extension means movable horizontally on the support means, elevating means rotatably mounted on the extension means, flow control means mounted on the elevating means and adapted for engagement with the bottom tap of a ladle, and fluid powered means adapted to actuate the extension means and elevating means.
Claim 14
Dependent Claim
64 words
A molten metal flow control safety device comprising support means mounted upon a vertical pivot, linear extension means movable horizontally on the support means, elevating means rotatably mounted on the extension means, flow control means mounted on the elevating means and adapted for engagement with the bottom tap of a ladle, and fluid powered means adapted to actuate the extension means and elevating means.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |