Patent US3904067A successfully refreshed from Google Patents.
US3904067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane tank for liquefied gases
Assignee: IHI Corp
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Filing: 1973-09-20
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Granted: 1975-09-09
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Expires: 1993-09-20
Abstract
Abstract The dimensions of the membrane tank are so selected that when it is cooled by liquefied gas charged therein and contracted, the flat portions may just contact with the inner surfaces of an insulating material lined over the inner wall of a shell structure. Restraining forces are applied to the membrane tank when the latter is installed into the insulating material structure. When the liquefied gas is charged into the membrane tank, the bending stresses generated are almost zero and the tank is subjected only to the hoop tensions.
Inventors
- 👤 Tsuneo Kuniyasu
- 👤 Daizo Goto
- 👤 Takayoshi Miyanari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:47
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C3/027; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2270/00; F17C2270/01; F17C2270/0102; F17C2270/0105; F17C2270/0107; Y; Y10; Y10S; Y10S220/00; Y10S220/09; Y10S220/901
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A storage container for liquefied gas comprising an outer shell, an inner lining of insulating material engaging the inner walls of said shell, and a flexible membrane tank within said inner lining, said tank including flat side, top and bottom portions and flat end portions, the side and top and bottom portions being connected by arcuate ridge portions each having a convex cylindrical surface, the dimensions of each flat portion of the tank being larger at room temperature than the corresponding portions of the lining, said dimensions being such that when the membrane tank is assembled within the lining, the flat portions of the tank engage the corresponding flat portions of the lining, with the arcuate ridge portions received within corners formed between adjacent side portions of the lining, said arcuate ridge portions retracting inwardly when the tank is cooled by liquefied gas placed therein.
Claim 2
Dependent Claim
145 words
A storage container for liquefied gas comprising an outer shell, an inner lining of insulating material engaging the inner walls of said shell, and a flexible membrane tank within said inner lining, said tank including flat side, top and bottom portions and flat end portions, the side and top and bottom portions being connected by arcuate ridge portions each having a convex cylindrical surface, the dimensions of each flat portion of the tank being larger at room temperature than the corresponding portions of the lining, said dimensions being such that when the membrane tank is assembled within the lining, the flat portions of the tank engage the corresponding flat portions of the lining, with the arcuate ridge portions received within corners formed between adjacent side portions of the lining, said arcuate ridge portions retracting inwardly when the tank is cooled by liquefied gas placed therein.
Claim 3
Dependent Claim
38 words
A tank as set forth in claim 1 wherein a space is provided between the lining and each ridge portion, the radius of curvature of the ridge portions being decreased when the tank is installed within the lining.
Claim 4
Dependent Claim
52 words
A tank as set forth in claim 1 wherein said tank is provided with convex sperical vertex portions when radius of curvature is less than the ridge portions, and the adjacent flat portions and sperical vertex portions are connected through a cylindrical connecting portion having a surface similar to a conical surface.
References Cited (Backward Citations)
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 |