US3595430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Containers for liquefied gases having corrigated wall structure
Assignee: Conch Ocean Ltd
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Filing: 1969-03-24
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Granted: 1971-07-27
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Expires: 1989-03-24
Abstract
Abstract Integrated or membrane tanks for cryogenic fluids such as liquid methane are often provided with parallel sets of crossed corrugations in the thin metal lining of the tank to provide excess metal for accommodating thermal expansion and contraction, which corrugations must be around a corner where two walls meet. A folded formation is provided at the corner to prevent excess thermal strains. In this disclosure the formation at the corner is made larger in cross section than some of the corrugations into which it merges, and the corrugations increase in cross section as they approach and merge into the formations, thus enabling the corner formation to be of large size and reducing the stresses at the formation. A new and effective formation configuration is also disclosed.
Inventors
- 👤 Gilbert Jean Louis Massac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:24
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C3/027; F17C2201/00; F17C2201/01; F17C2201/0147; F17C2201/0157; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/0105
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A sheet metal corner piece for prismatic cryogenic tanks having sheet metal walls with stress-relieving linearly extending wall corrugations extending perpendicular to dihedral corners of the tank, said corner piece having at least two corner corrugations transverse to the corner and matching respective wall corrugations in two of said sheet metal walls, said corrugations meeting at the corner in a formation containing excess metal which permits contraction and expansion of the corner piece in the direction of length of the corner, at least one of said corner corrugations increasing in crosssectional size toward the formation.
Claim 2
Dependent Claim
95 words
A sheet metal corner piece for prismatic cryogenic tanks having sheet metal walls with stress-relieving linearly extending wall corrugations extending perpendicular to dihedral corners of the tank, said corner piece having at least two corner corrugations transverse to the corner and matching respective wall corrugations in two of said sheet metal walls, said corrugations meeting at the corner in a formation containing excess metal which permits contraction and expansion of the corner piece in the direction of length of the corner, at least one of said corner corrugations increasing in crosssectional size toward the formation.
Claim 3
Dependent Claim
134 words
For use in a corner junction between two linearly extending wall corrugations of identical small cross-sectional size in two sheet metal walls which meet at a corner, a corner piece having short corrugations each of varying cross-sectional size tapering from a small cross-sectional size adjacent the edges of the corner piece commensurate with the small cross-sectional size of the corrugations in the walls to be connected and progressively increasing in cross-sectional size toward the center of the corner piece at the dihedral angle where they are of a large cross-sectional size, a central folded formation at the corner line of said corner piece, said formation providing excess metal for accommodating contraction and expansion along the length of the corner junction, said central formation merging smoothly into said short tapering corrugations at their larger end.
Claim 4
Dependent Claim
134 words
For use in a corner junction between two linearly extending wall corrugations of identical small cross-sectional size in two sheet metal walls which meet at a corner, a corner piece having short corrugations each of varying cross-sectional size tapering from a small cross-sectional size adjacent the edges of the corner piece commensurate with the small cross-sectional size of the corrugations in the walls to be connected and progressively increasing in cross-sectional size toward the center of the corner piece at the dihedral angle where they are of a large cross-sectional size, a central folded formation at the corner line of said corner piece, said formation providing excess metal for accommodating contraction and expansion along the length of the corner junction, said central formation merging smoothly into said short tapering corrugations at their larger end.
Claim 5
Dependent Claim
92 words
For use in a container of the type specified, a dihedral sheet material corner piece having two corrugations, one in each limb of the corner piece and meeting at the angle of the corner in a formation containing an excess area of material permitting contraction and expansion of the corner piece In the direction of length of the corner, at least one of the two corrugations successively increasing in cross-sectional size towards said formation, the other corrugation being of a minimum cross-sectional size greater than the minimum cross-sectional size of the first.
Claim 6
Dependent Claim
92 words
For use in a container of the type specified, a dihedral sheet material corner piece having two corrugations, one in each limb of the corner piece and meeting at the angle of the corner in a formation containing an excess area of material permitting contraction and expansion of the corner piece In the direction of length of the corner, at least one of the two corrugations successively increasing in cross-sectional size towards said formation, the other corrugation being of a minimum cross-sectional size greater than the minimum cross-sectional size of the first.
Claim 7
Dependent Claim
13 words
A corner piece according to claim 3, folded from a single flat sheet.
Claim 8
Dependent Claim
28 words
A corner piece according to claim 4, wherein the formation comprises a convex bridging section between two U-shaped troughs transverse to the respective corrugations in the two limbs.
Claim 9
Dependent Claim
26 words
A corner piece according to claim 5 wherein the bridging section is formed with a concave of corrugation of small cross section parallel to the corner.
Claim 10
Dependent Claim
24 words
A corner piece according to claim 3, wherein one of the corrugations is of uniform size, equal to the maximum size of the other.
Claim 11
Dependent Claim
16 words
A corner piece according to claim 3 wherein both corrugations increase in size towards the formation.
Claim 12
Dependent Claim
147 words
For use in a sheet metal container subject to large temperature variations and having at least two sheet metal walls meeting at a corner, said walls having spaced inwardly convex corrugations with plane wall sections between them, a sheet metal corner piece having corrugations matching the corrugations of said two walls, said last corrugations meeting at the corner line of the corner piece in a central folded formation, said formation providing excess metal for accommodating contraction and expansion along the length of the corner line, said folded formation comprising a bridging inwardly convex corrugation merging through two respective inwardly concave corrugations with the respective wall-matching corrugations of said corner piece, the central portion of said bridging corrugation being dimpled inwardly concavely to provide a small creased trough parallel to the corner line in the region that would otherwise be the highest point in the convex bridging corrugation.
Claim 13
Dependent Claim
147 words
For use in a sheet metal container subject to large temperature variations and having at least two sheet metal walls meeting at a corner, said walls having spaced inwardly convex corrugations with plane wall sections between them, a sheet metal corner piece having corrugations matching the corrugations of said two walls, said last corrugations meeting at the corner line of the corner piece in a central folded formation, said formation providing excess metal for accommodating contraction and expansion along the length of the corner line, said folded formation comprising a bridging inwardly convex corrugation merging through two respective inwardly concave corrugations with the respective wall-matching corrugations of said corner piece, the central portion of said bridging corrugation being dimpled inwardly concavely to provide a small creased trough parallel to the corner line in the region that would otherwise be the highest point in the convex bridging corrugation.
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |