Patent US4387927A successfully refreshed from Google Patents.
Patent US3713639A successfully refreshed from Google Patents.
US3713639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melting or holding vessel for liquid metals with an adjoining electromagnetic conveying trough
Assignee: SMS Elotherm GmbH
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Filing: 1971-08-10
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Granted: 1973-01-30
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Expires: 1991-08-10
Abstract
Abstract A melting and holding vessel for liquid metals with an adjoining electromagnetic trough in which the active inductor surface at its bottom end adjacent the vessel and in the region of the first pole is much more steeply pitched in relation to the horizontal than in the region of the upwardly following poles and the thickness of the refractory lining between the active inductor surface and the trough bottom increases towards the end of the inductor and gradually merges into the refractory lining of the vessel, so that the risk of cracking in the transitional zone between vessel and trough is substantially avoided.
Inventors
- 👤 Starck A Von
- 👤 F Schnake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:05
CPC Classifications
B; B22; B22D; B22D39/00; B22D39/003; B22D39/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
214 words
In a vessel for liquid metals comprising a holding chamber lined with refractory material and an adjoining electromagnetic conveying trough having a body including a refractory lining which merges into the refractory lining of said chamber ascending from a lower end merging into the holding chamber and an inductor below the body with a plurality of poles for generating a traveling electromagnetic field to propel the liquid metal in open flow up the trough away from the holding chamber and out through a spout at the upper end of the trough, the improvement wherein the surface of the inductor at its bottom end adjacent the chamber and in the region of the first pole adjacent the bottom end is much more steeply pitched with respect to the horizontal than in the region of the upwardly following poles, and wherein the thickness of the refractory lining between the surface of the inductor and the surface of the bottom of the trough in the region of the first pole adjacent the chamber increases at least at a substantially uniform rate towards the end of the inductor and merges into the greater thickness of the refractory lining of the holding chamber so as to avoid cracking in the transitional region between the holding chamber and the trough.
Claim 2
Dependent Claim
214 words
In a vessel for liquid metals comprising a holding chamber lined with refractory material and an adjoining electromagnetic conveying trough having a body including a refractory lining which merges into the refractory lining of said chamber ascending from a lower end merging into the holding chamber and an inductor below the body with a plurality of poles for generating a traveling electromagnetic field to propel the liquid metal in open flow up the trough away from the holding chamber and out through a spout at the upper end of the trough, the improvement wherein the surface of the inductor at its bottom end adjacent the chamber and in the region of the first pole adjacent the bottom end is much more steeply pitched with respect to the horizontal than in the region of the upwardly following poles, and wherein the thickness of the refractory lining between the surface of the inductor and the surface of the bottom of the trough in the region of the first pole adjacent the chamber increases at least at a substantially uniform rate towards the end of the inductor and merges into the greater thickness of the refractory lining of the holding chamber so as to avoid cracking in the transitional region between the holding chamber and the trough.
Claim 3
Dependent Claim
214 words
In a vessel for liquid metals comprising a holding chamber lined with refractory material and an adjoining electromagnetic conveying trough having a body including a refractory lining which merges into the refractory lining of said chamber ascending from a lower end merging into the holding chamber and an inductor below the body with a plurality of poles for generating a traveling electromagnetic field to propel the liquid metal in open flow up the trough away from the holding chamber and out through a spout at the upper end of the trough, the improvement wherein the surface of the inductor at its bottom end adjacent the chamber and in the region of the first pole adjacent the bottom end is much more steeply pitched with respect to the horizontal than in the region of the upwardly following poles, and wherein the thickness of the refractory lining between the surface of the inductor and the surface of the bottom of the trough in the region of the first pole adjacent the chamber increases at least at a substantially uniform rate towards the end of the inductor and merges into the greater thickness of the refractory lining of the holding chamber so as to avoid cracking in the transitional region between the holding chamber and the trough.
Claim 4
Dependent Claim
214 words
In a vessel for liquid metals comprising a holding chamber lined with refractory material and an adjoining electromagnetic conveying trough having a body including a refractory lining which merges into the refractory lining of said chamber ascending from a lower end merging into the holding chamber and an inductor below the body with a plurality of poles for generating a traveling electromagnetic field to propel the liquid metal in open flow up the trough away from the holding chamber and out through a spout at the upper end of the trough, the improvement wherein the surface of the inductor at its bottom end adjacent the chamber and in the region of the first pole adjacent the bottom end is much more steeply pitched with respect to the horizontal than in the region of the upwardly following poles, and wherein the thickness of the refractory lining between the surface of the inductor and the surface of the bottom of the trough in the region of the first pole adjacent the chamber increases at least at a substantially uniform rate towards the end of the inductor and merges into the greater thickness of the refractory lining of the holding chamber so as to avoid cracking in the transitional region between the holding chamber and the trough.
Claim 5
Dependent Claim
28 words
In a vessel as in claim 1, the further improvement wherein the end of the inductor surface at the holding chamber extends below the floor of the chamber.
Claim 6
Dependent Claim
34 words
In a vessel as in claim 1, the further improvement wherein the surface of the bottom of the trough merges at least substantially continuously into the surface of the floor of the holding chamber.
Claim 7
Dependent Claim
63 words
In a vessel as in claim 1, the further improvement wherein the thickness of the lining of the chamber floor increases at least substantially at a uniform rate in the direction away from the trough, at least in a region of the chamber floor which adjoins the lining of the trough above the last inductor pole at the chamber end of the trough.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |