US3788096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic gas traps
Assignee: L Liquide SA L Etude L Exploitation Procedes Claude G fr
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Filing: 1972-07-12
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Granted: 1974-01-29
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Expires: 1992-07-12
Abstract
Abstract In a cryogenic gas trap for separating out at least one constituent from a flow of gas, the coefficient of exchange between a condensation surface and a cryogenic fluid which cools said surface is substantially improved by utilizing said fluid in the two-phase gas-vapour form. The gas trap comprises a first condensation surface formed by a nest of vertical metallic tubes arranged around ant at a distance from a second condensation surface constituted by a casing 12, in the interior of which is arranged a tank 15 containing the cryogenic liquid. The tubes communicate at one extremity with an annular conduit comprised between said casing and said tank, and at the other extremity with a manifold 17. The trap may be utilized in the general field of industrial vacuum: metallurgy under vacuum, metallization, distillation and vaporization under vacuum, drying under reduced pressure.
Inventors
- 👤 J Brilloit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:19
CPC Classifications
B; B01; B01D; B01D8/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
202 words
A cryogenic gas trap of the kind comprising a thermally insulated casing having a first opening for the introduction of a flow of gas of which at least one constituent is to be trapped, and a second opening for the evacuation of the flow of gas, a tank for a cryogenic fluid arranged in the interior of said casing, means for introducing the cryogenic fluid into the interior of said tank, means for evacuating the cryogenic fluid out of said tank, said evacuation means communicating with the upper portion of said tank and forming a trapping surface for said constituent, in which said evacuation means comprise at least one external wall disposed in the vicinity of and at a distance from said tank, forming with the wall of said tank at least one conduit of which one extremity communicates with the upper portion of the tank by means of an opening forming a spillway in said conduit for said cryogenic fluid, at least one plurality of substantially straight tubes arranged at a distance from said external wall, one extremity of which communicates with the other extremity of said conduit while the other extremity communicates with an evacuation manifold for said cryogenic fluid.
Claim 2
Dependent Claim
202 words
A cryogenic gas trap of the kind comprising a thermally insulated casing having a first opening for the introduction of a flow of gas of which at least one constituent is to be trapped, and a second opening for the evacuation of the flow of gas, a tank for a cryogenic fluid arranged in the interior of said casing, means for introducing the cryogenic fluid into the interior of said tank, means for evacuating the cryogenic fluid out of said tank, said evacuation means communicating with the upper portion of said tank and forming a trapping surface for said constituent, in which said evacuation means comprise at least one external wall disposed in the vicinity of and at a distance from said tank, forming with the wall of said tank at least one conduit of which one extremity communicates with the upper portion of the tank by means of an opening forming a spillway in said conduit for said cryogenic fluid, at least one plurality of substantially straight tubes arranged at a distance from said external wall, one extremity of which communicates with the other extremity of said conduit while the other extremity communicates with an evacuation manifold for said cryogenic fluid.
Claim 3
Dependent Claim
23 words
A cryogenic trap as claimed in claim 1, in which said plurality of tubes are filled at least partially with a porous material.
Claim 4
Dependent Claim
18 words
A cryogenic trap as claimed in claim 2, in which said porous material is a conductor Of heat.
Claim 5
Dependent Claim
16 words
A cryogenic trap as claimed in claim 3, in which said porous material comprises copper turnings.
Claim 6
Dependent Claim
41 words
A cryogenic trap as claimed in claim 1, in which said external wall is constituted by a casing surrounding said tank and forming with the wall of said tank an annular conduit, said plurality of tubes being distributed around said tank.
Claim 7
Dependent Claim
33 words
A cryogenic trap as claimed in claim 5, in which said first opening is located above said tank and said second opening is at the level of the lower portion of said casing.
Claim 8
Dependent Claim
58 words
A cryogenic trap as claimed in claim 1, of the kind comprising means for regulating the temperatures of the trapping surface, in which said regulating means comprise a temperature probe arranged in the interior of the evacuation means for the cryogenic fluid, on the downstream side of said manifold in the direction of circulation of said cryogenic fluid.
References Cited (Backward Citations)
US3144756A
Cited
US3371499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |