Patent EP0194602A1 successfully refreshed from Google Patents.
US4492089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible cryogenic conduit
Assignee: Kabelmetal Electro GmbH
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Filing: 1983-09-12
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Granted: 1985-01-08
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Expires: 2003-09-12
Abstract
Abstract The interior of a tube provided for low temperature operation is shielded from the exterior through a plurality of metal ribbons helically looping around the tube in an intertwined relationship and each carrying a welded on conduit for low temperature liquid whereby one of these conduits serves as a primary or outgoing conductor, and the two others serve as return paths; suitable spacers are provided to position the system in a concentric relation; inner and outermost tubes are preferably corrugated and the immediate interior of the outermost tube is filled with superinsulation.
Inventors
- 👤 Peter Rohner
- 👤 Klausdieter Schippl
- 👤 Gunther Blumenberg
- 👤 Werner Meyer
- 👤 Wolfgang Obert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:42
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/141; F16L53/00; F16L53/70; H; H01; H01B; H01B12/00; H01B12/14; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885; Y10S505/886
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A cryogenic tube system including at first corrugated tube, the interior of which is to be thermally isolated against the exterior at large; and a second, outer also corrugated tube concentrically arranged with respect to said inner tube, to establish a flexible assembly comprising: a plurality of metallic ribbons being of a flat cross-section and arranged helically in an intertwined relationship around said inner tube; a corresponding plurality of conduits for coolant affixed respectively to said ribbons, facing the outer tube and looping accordingly around said inner tube in a configuration of intertwined helices; and spacer means arranged with respect to the aforementioned assembly for supporting thereon said outer tube.
Claim 2
Dependent Claim
110 words
A cryogenic tube system including at first corrugated tube, the interior of which is to be thermally isolated against the exterior at large; and a second, outer also corrugated tube concentrically arranged with respect to said inner tube, to establish a flexible assembly comprising: a plurality of metallic ribbons being of a flat cross-section and arranged helically in an intertwined relationship around said inner tube; a corresponding plurality of conduits for coolant affixed respectively to said ribbons, facing the outer tube and looping accordingly around said inner tube in a configuration of intertwined helices; and spacer means arranged with respect to the aforementioned assembly for supporting thereon said outer tube.
Claim 3
Dependent Claim
20 words
Tube system as in claim 1 wherein said conduits are welded respectively to said ribbons providing continuous uninterrupted welding contact.
Claim 4
Dependent Claim
33 words
A system as in claim 1 there being altogether three ribbons and three conduits accordingly, one of them serving as primary outgoing conduit, the two others serving as return path for the coolant.
Claim 5
Dependent Claim
33 words
A system as in claim 3 wherein the ribbons carrying the conduits serving as return paths overlap while the ribbon carrying the primary conduit is axially spaced from the respective two other ribbons.
Claim 6
Dependent Claim
20 words
A system as in claim 4 said spacer means being disposed partially in between the conduits serving as return paths.
References Cited (Backward Citations)
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |