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Patent US3552485A successfully refreshed from Google Patents.
US3552485A
Expired / Lapsed
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Cold trap
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1968-10-07
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Granted: 1971-01-05
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Expires: 1988-10-07
Abstract
Abstract A cold trap for a liquid metal circulation system comprises a circulation vessel containing successively an economizer coil unit, a heat exchanger for effecting the cooling of the liquid metal and a filter unit for impurities. The filter unit is made up of two sections mounted in end-to-end relation. The first section is of small thickness and is placed at the level of said heat exchanger whilst the second filter section is of greater thickness and is placed at the outlet of the heat exchanger. Said second filter section has the shape of a cylinder whose lateral surface is in contact with the flow of cooled liquid metal and is connected internally to the economizer coil unit so as to permit the discharge of liquid metal from the trap.
Inventors
- 👤 Jean-Pierre Le Jannou
- 👤 Noel Lions
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:54
CPC Classifications
G; G21; G21C; G21C19/00; G21C19/28; G21C19/30; G21C19/307; G21C19/31; G21C19/313; B; B01; B01D; B01D35/00; B01D35/18; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
A cold trap for a liquid-metal circulation system, comprising a circulation vessel which contains successively an economizercoil unit, a heat exchanger for effecting the cooling of the liquid metal and a filter unit for impurities, characterized in that said filter unit is made up of two sections mounted in endto-end relation, the first filter section having a small thickness of filter element and being placed at the level of said heat exchanger whilst the second filter section which has a greater thickness of filter element is placed at the outlet of said heat exchanger, said second filter section having the shape of a cylinder whose lateral surface is in contact with the flow of cooled liquid metal and is connected internally to said economizer coil unit so as to permit the discharge of said liquid metal from the trap.
Claim 2
Dependent Claim
139 words
A cold trap for a liquid-metal circulation system, comprising a circulation vessel which contains successively an economizercoil unit, a heat exchanger for effecting the cooling of the liquid metal and a filter unit for impurities, characterized in that said filter unit is made up of two sections mounted in endto-end relation, the first filter section having a small thickness of filter element and being placed at the level of said heat exchanger whilst the second filter section which has a greater thickness of filter element is placed at the outlet of said heat exchanger, said second filter section having the shape of a cylinder whose lateral surface is in contact with the flow of cooled liquid metal and is connected internally to said economizer coil unit so as to permit the discharge of said liquid metal from the trap.
Claim 3
Dependent Claim
25 words
A cold trap in accordance with claim 1, characterized in that said filter unit comprises filter elements which are constituted by cylinders of stainless-steel wool.
Claim 4
Dependent Claim
48 words
A cold trap in accordance with claim 1, characterized in that said heat exchanger is disposed externally of said vessel and comprises an annular jacket which contains a stagnant liquid medium and a piping system for circulating a cooling liquid therein which surrounds the sidewall of said vessel.
Claim 5
Dependent Claim
43 words
A cold trap in accordance with claim 1, characterized in that said filter unit comprises a screen forming a baffle which prevents the direct passage of said liquid metal from the exterior to the interior of said filter unit through the ends thereof.
Claim 6
Dependent Claim
16 words
A cold trap in accordance with claim 1, characterized in that said liquid metal is sodium.
References Cited (Backward Citations)
US2745552A
Cited
US2863558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |