US3787143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion pump for pumping corrosive liquid metals
Assignee: Groupement Atomique Alsacienne Atlantique SA
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Filing: 1972-03-16
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Granted: 1974-01-22
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Expires: 1992-03-16
Abstract
Abstract Immersion pump having slight bulk, for liquid metals, operating by conduction, consisting of one or two magnetic circuits, a conduction loop made of liquid metal and of two electrodes limiting the liquid metal duct in the active zone. A refractory material is cast round the components of the pump, and protects them against the corrosive action of the liquid metal. The part which is not immersed comprising the induction windings of the magnetic circuits is protected by a cast aluminum steel housing.
Inventors
- 👤 H Carbonnel
- 👤 R Borie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
In an immersion pump having slight bulk and adapted for use with very corrosive liquid metals, said pump operating by conduction and comprising: a vertical liquid metal duct between two electrodes; a horizontal conduction loop electrically connected to the two electrodes; a main magnetic circuit containing a main winding and connected to the two electrodes; a secondary magnetic circuit with its winding disposed so as to induce a current in said horizontal conduction loop; and a pump body covered by a housing containing the two windings, the improvement wherein said horizontal conduction loop is made of a liquid metal.
Claim 2
Dependent Claim
99 words
In an immersion pump having slight bulk and adapted for use with very corrosive liquid metals, said pump operating by conduction and comprising: a vertical liquid metal duct between two electrodes; a horizontal conduction loop electrically connected to the two electrodes; a main magnetic circuit containing a main winding and connected to the two electrodes; a secondary magnetic circuit with its winding disposed so as to induce a current in said horizontal conduction loop; and a pump body covered by a housing containing the two windings, the improvement wherein said horizontal conduction loop is made of a liquid metal.
Claim 3
Dependent Claim
29 words
An immersion pump as claimed in claim 1, wherein the liquid metal forming said horizontal conduction loop is the same very corrosive liquid metal flowing in the pump body.
Claim 4
Dependent Claim
42 words
An immersion pump as claimed in claim 2 wherein said horizontal conduction loop is adapted to connect to the very corrosive liquid metal flowing in the pump body throught at least one duct leading into the immersed part of the pump body.
Claim 5
Dependent Claim
51 words
An immersion pump as claimed in claim 2 wherein the pump body comprises a block of refractory material having a substantially polyhedrical external shape cast round the elements forming the pump, to support them in a predetermined position and to isolate them from any accidental contact with the corrosive liquid metal.
Claim 6
Dependent Claim
70 words
An immersion pump as claimed in claim 4 wherein the pump body is protected in its part which is not immersed, by a lower housing resting on the shoulder formed by refractory material of the pump body and ending, at its upper part, in a faced flange on which an upper housing rests through a flange, also faced, and wherein the two housings are joined together by flanges coupled together.
Claim 7
Dependent Claim
35 words
An immersion pump as claimed in claim 1 wherein the loop is connected to the atmosphere through a duct leading to the surface of the pump body beyond the immersed part of the pump body.
Claim 8
Dependent Claim
38 words
An immersion pump as claimed in claim 6 wherein the upper housing comprises an axial passage for the heat-proof metal outlet duct, and has, at its periphery, a fresh air inlet channel and a hot gas evacuation channel.
Claim 9
Dependent Claim
49 words
In a magnetohydrodynamic conduction pump adapted for use while immersed in a very corrosive liquid metal and containing a horizontal conduction loop electrically connected to two electrodes between which a vertical liquid metal duct is passed, the improvement wherein said horizontal conduction loop is made of a liquid metal.
Claim 10
Dependent Claim
49 words
In a magnetohydrodynamic conduction pump adapted for use while immersed in a very corrosive liquid metal and containing a horizontal conduction loop electrically connected to two electrodes between which a vertical liquid metal duct is passed, the improvement wherein said horizontal conduction loop is made of a liquid metal.
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |