US3706399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for regulating the flow-rate of melt from a container
Assignee: ABB Norden Holding AB
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Filing: 1970-05-06
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Granted: 1972-12-19
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Expires: 1990-05-06
Abstract
Abstract A furnace or ladle for melt has an outlet tube extending upwardly from its bottom at an angle from the vertical. An electromagnetic valve around the tube controls the flow of melt through the tube to some desired value.
Inventors
- 👤 Yngve Sundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/16; B22D11/18; B22D11/181; B22D11/10; B22D39/00; B22D39/003; B22D39/006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
Means for regulating the speed of melt flowing out of a container, comprising a multiphase electromagnetic valve pump arranged around an outlet in the container, said outlet being an upwardly directed tube, leading from the lower part of the container to a level below the highest possible melt level in the container, said valve pump being arranged around the tube and its coil being fed with multi-phase AC voltage with switchable phase sequence, the direction of the phase sequence being controlled from the output from measuring means for measuring the amount of melt in a device to be filled from the container.
Claim 2
Dependent Claim
102 words
Means for regulating the speed of melt flowing out of a container, comprising a multiphase electromagnetic valve pump arranged around an outlet in the container, said outlet being an upwardly directed tube, leading from the lower part of the container to a level below the highest possible melt level in the container, said valve pump being arranged around the tube and its coil being fed with multi-phase AC voltage with switchable phase sequence, the direction of the phase sequence being controlled from the output from measuring means for measuring the amount of melt in a device to be filled from the container.
Claim 3
Dependent Claim
65 words
Means according to claim 1, characterized in that the voltage is arranged to be regulated as to phase sequence in such a way that the resultant force of the valve on the melt can be varied from a direction towards the melt in the container to a direction from the container, for example to effect the desired tapping regardless of the level in the container.
Claim 4
Dependent Claim
40 words
Means according to claim 1, characterized in that the electromagnetic valve is given such a height that it extends from a level near the bottom of the container to a level at approximately half the effective height in the container.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |