US3903931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sleeve having deformable walls
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1973-06-25
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Granted: 1975-09-09
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Expires: 1993-06-25
Abstract
Abstract A hollow-walled deformable sleeve for heat insulation and application of prestress to a cylindrical component within an enclosure is constituted by two coaxial walls joined to each other by two half-tori each having the same axis as the walls. Flutes formed in uniformly spaced relation around the periphery of each wall have terminal openings alternately on one half-torus and on the other. Each flute has an axis which is parallel to that of the sleeve and a length which exceeds one-half the height of said sleeve.
Inventors
- 👤 Maurice Moulin
- 👤 Michel Roze
- 👤 Jean Vivien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16J; F16J15/00; F16J15/46; F16L59/12; F16L59/121; F16L59/16; G; G21; G21C; G21C11/00; G21C11/08; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A hollow sleeve surrounding a duct having the shape of a hollow ring of revolution, two spaced deformable coaxial walls for said sleeve, said walls being an inner and outer wall, two curved wall extensions having the same axis as said walls welded to and connecting and sealing said walls, preformed resilient corrugations in each of said walls uniformly spaced ove the periphery of each of said walls, the axis of each of said corrugations being parallel to that of said sleeve and the length of each of said corrugations being slightly greater than one-half the height of said sleeve, said corrugations opening alternately on opposite ones of said curved extensions and means for applying pressure within said sleeve to expand said sleeve into contact with the duct.
Claim 2
Dependent Claim
128 words
A hollow sleeve surrounding a duct having the shape of a hollow ring of revolution, two spaced deformable coaxial walls for said sleeve, said walls being an inner and outer wall, two curved wall extensions having the same axis as said walls welded to and connecting and sealing said walls, preformed resilient corrugations in each of said walls uniformly spaced ove the periphery of each of said walls, the axis of each of said corrugations being parallel to that of said sleeve and the length of each of said corrugations being slightly greater than one-half the height of said sleeve, said corrugations opening alternately on opposite ones of said curved extensions and means for applying pressure within said sleeve to expand said sleeve into contact with the duct.
Claim 3
Dependent Claim
16 words
A hollow deformable sleeve according to claim 1, wherein said hollow sleeve is of cylindrical shape.
Claim 4
Dependent Claim
15 words
A hollow deformable sleeve according to claim 1, wherein said sleeve is of frusto-conical shape.
Claim 5
Dependent Claim
19 words
A hollow deformable sleeve according to claim 1, wherein said sleeve has the shape of a frustum of sphere.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |