US3288069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic pumps for pumping molten metal
Assignee: Institut de Recherches de la Siderurgie Francaise IRSID
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Filing: 1963-08-26
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Granted: 1966-11-29
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 Michaux Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:34
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN AN ELECTROMAGNETIC PUMP FOR PUMPING MOLTEN METAL, IN COMBINATION, AN OUTER ELONGATED ELECTRICALLY-CONDUCTIVE BAR EXTENDING IN THE SAME GENERAL DIRECTION AS AND LOCATED ALONG A STREAM OF MOLTEN METAL WHICH IS PUMPED BY THE ELECTROMAGNETIC PUMP; AN INNER ELONGATED ELECTRICALLY-CONDUCTIVE METALLIC BAR OF SUBSTANTIALLY THE SAME COMPOSITION AS THE STREAM OF MOLTEN METAL, SAID INNER BAR BEING LOCATED BETWEEN AND ENGAGING BOTH THE STREAM OF MOLTEN METAL AND THE OUTER ELECTRICALLY-CONDUCTIVE BAR FOR ELECTRICALLY CONNECTING THE LATTER TO THE STREAM OF METAL, THE MATERIAL OF SAID OUTER ELECTRICALLY-CONDUCTIVE BAR HAVING A LOWER MELTING POINT AND A HIGHER ELECTRICAL CONDUCTIVITY THAN THE MATERIAL OF SAID INNER BAR; AND COOLING MEANS FOR COOLING AT LEAST THAT PORTION OF SAID INNER BAR WHICH ENGAGES SAID OUTER BAR FOR MAINTAINING SAID PORTION OF SAID INNER BAR AT A TEMPERATURE SUFFICIENTLY LOW TO MAINTAIN AT LEAST SAID PORTION OF SAID INNER BAR IN A SOLID STATE.
Claim 2
Dependent Claim
152 words
IN AN ELECTROMAGNETIC PUMP FOR PUMPING MOLTEN METAL, IN COMBINATION, AN OUTER ELONGATED ELECTRICALLY-CONDUCTIVE BAR EXTENDING IN THE SAME GENERAL DIRECTION AS AND LOCATED ALONG A STREAM OF MOLTEN METAL WHICH IS PUMPED BY THE ELECTROMAGNETIC PUMP; AN INNER ELONGATED ELECTRICALLY-CONDUCTIVE METALLIC BAR OF SUBSTANTIALLY THE SAME COMPOSITION AS THE STREAM OF MOLTEN METAL, SAID INNER BAR BEING LOCATED BETWEEN AND ENGAGING BOTH THE STREAM OF MOLTEN METAL AND THE OUTER ELECTRICALLY-CONDUCTIVE BAR FOR ELECTRICALLY CONNECTING THE LATTER TO THE STREAM OF METAL, THE MATERIAL OF SAID OUTER ELECTRICALLY-CONDUCTIVE BAR HAVING A LOWER MELTING POINT AND A HIGHER ELECTRICAL CONDUCTIVITY THAN THE MATERIAL OF SAID INNER BAR; AND COOLING MEANS FOR COOLING AT LEAST THAT PORTION OF SAID INNER BAR WHICH ENGAGES SAID OUTER BAR FOR MAINTAINING SAID PORTION OF SAID INNER BAR AT A TEMPERATURE SUFFICIENTLY LOW TO MAINTAIN AT LEAST SAID PORTION OF SAID INNER BAR IN A SOLID STATE.
References Cited (Backward Citations)
US2386369A
Cited
US3084629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |