Patent US3822714A successfully refreshed from Google Patents.
US3822714A
Expired / Lapsed
US
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Conduit system for the transport of liquid and/or gaseous media and method
Assignee: Forschungszentrum Jülich
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Filing: 1971-03-24
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Granted: 1974-07-09
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Expires: 1991-03-24
Abstract
Abstract In a conduit system for transporting fluids which includes a vacuumized tubular casing containing fluid medium-carrying conduits, there is provided an outer protective tube surrounding the vacuumized tubular casing and defining therewith an annular jacket which contains an inert gas. The inert gas is such that it does not condense during a possible entry into the vacuumized tubular casing, exhibits a pressure which is higher than the pressure of the environment surrounding the protective tube and higher than the pressure of the fluid being transported, and has a boiling point below the operating temperature of the fluid being transported.
Inventors
- 👤 C Doose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:59
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/06; F16L1/00; F16L1/12; F16L39/00; F16L39/005; F16L9/00; F16L9/18; F16L2101/00; F16L2101/30; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/888; Y10S505/897; Y10T; Y10T137/00; Y10T137/0318; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
In a conduit system for transporting fluids with a high reliability of insulation with respect to the environment surrounding the system, said system being of the type that includes at least one fluid-carrying conduit surrounded by a vacuumized tubular casing, the improvement comprising a gastight protective outer tube surrounding said tubular casing for defining therewith an annular space and a protective inert gas which does not condense during a possible entry into said vacuumized tubular casing, said inert gas filling said space surrounding said tubular casing and having a pressure which is higher than the pressure of the environment surrounding said outer tube, a pressure higher than the pressure of the fluid being transported and a boiling point below the operating temperature of the fluid being transported.
Claim 2
Dependent Claim
127 words
In a conduit system for transporting fluids with a high reliability of insulation with respect to the environment surrounding the system, said system being of the type that includes at least one fluid-carrying conduit surrounded by a vacuumized tubular casing, the improvement comprising a gastight protective outer tube surrounding said tubular casing for defining therewith an annular space and a protective inert gas which does not condense during a possible entry into said vacuumized tubular casing, said inert gas filling said space surrounding said tubular casing and having a pressure which is higher than the pressure of the environment surrounding said outer tube, a pressure higher than the pressure of the fluid being transported and a boiling point below the operating temperature of the fluid being transported.
Claim 3
Dependent Claim
14 words
A conduit system as defined in claim 1, wherein said inert gas is helium.
Claim 4
Dependent Claim
34 words
An improvement as defined in claim 1, including spaced housings along said conduit system, said housings are formed as enlargements of said gastight protective outer tube; each housing includes normally closed access opening means.
Claim 5
Dependent Claim
16 words
An improvement as defined in claim 3, wherein said opening means are designed as glove-like ducts.
Claim 6
Dependent Claim
63 words
In a method of transporting fluids by a conduit system including at least one fluid-carrying conduit surrounded by a vacuumized tubular casing, the improvement comprising the steps of surrounding said tubular casing with a layer of protective inert gas having a boiling point below the operating temperature of said conduit system and maintaining the pressure of said inert gas above the atmospheric pressure.
Claim 7
Dependent Claim
63 words
In a method of transporting fluids by a conduit system including at least one fluid-carrying conduit surrounded by a vacuumized tubular casing, the improvement comprising the steps of surrounding said tubular casing with a layer of protective inert gas having a boiling point below the operating temperature of said conduit system and maintaining the pressure of said inert gas above the atmospheric pressure.
Claim 8
Dependent Claim
68 words
In a method of transporting fluids by a conduit system including at least one fluid-carrying conduit surrounded by a vacuumized tubular casing, the improvement comprising the steps of surrounding said tubular casing with a layer of protective inert gas having a boiling point below the operating temperature of said conduit system and maintaining the pressure of said inert gas above the pressure of the fluids to be transported.
Claim 9
Dependent Claim
68 words
In a method of transporting fluids by a conduit system including at least one fluid-carrying conduit surrounded by a vacuumized tubular casing, the improvement comprising the steps of surrounding said tubular casing with a layer of protective inert gas having a boiling point below the operating temperature of said conduit system and maintaining the pressure of said inert gas above the pressure of the fluids to be transported.
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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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |