US3913775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for holding heat insulating materials for double-shell low-temperature liquid storage tank
Assignee: IHI Corp
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Filing: 1974-01-21
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Granted: 1975-10-21
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Expires: 1994-01-21
Abstract
Abstract A cylindrical intermediate wall consisting of a plurality of arcuate intermediate wall segments interconnected by means of expandable joints is installed between the outer and inner shells of a double-shell low-temperature liquid storage tank in such a way that the intermediate wall may be supported by the outer shell, and granular heat insulating materials packed into the space between the outer shell and the cylindrical intermediate wall may be held undisturbed regardless of the deformation due to temperature change of the inner shell.
Inventors
- 👤 Masahiko Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:10
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/08; F17C13/081; F17C3/00; F17C3/02; F17C2203/00; F17C2203/01; F17C2203/014; F17C2203/015; Y; Y10; Y10S; Y10S220/00; Y10S220/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
A heat-insulated liquid storage tank comprising a bottom, a cylindrical one-piece outer shell, a cylindrical one-piece inner shell spaced therefrom, a roof for said outer shell, a roof for said inner shell and a series of arcuate one-piece segments disposed between said inner shell and said outer shell to form a cylindrical intermediate wall, the edge of each of said segments being provided with vertically extending integral flanges, adjacent flanges of each segment being spaced from each other, an expansable joint connecting adjacent flanges to permit expansion and contraction of said intermediate wall, means for connecTing the intermediate wall to the inner surface of the outer shell and disposed in the space between said intermediate wall and said outer shell to provide support for said intermediate wall, and insulating material disposed in the space between said intermediate shell and said outer wall.
Claim 2
Dependent Claim
142 words
A heat-insulated liquid storage tank comprising a bottom, a cylindrical one-piece outer shell, a cylindrical one-piece inner shell spaced therefrom, a roof for said outer shell, a roof for said inner shell and a series of arcuate one-piece segments disposed between said inner shell and said outer shell to form a cylindrical intermediate wall, the edge of each of said segments being provided with vertically extending integral flanges, adjacent flanges of each segment being spaced from each other, an expansable joint connecting adjacent flanges to permit expansion and contraction of said intermediate wall, means for connecTing the intermediate wall to the inner surface of the outer shell and disposed in the space between said intermediate wall and said outer shell to provide support for said intermediate wall, and insulating material disposed in the space between said intermediate shell and said outer wall.
Claim 3
Dependent Claim
24 words
A heat-insulated liquid storage tank as defined in claim 1 wherein the space between adjacent flanges is packed with a heat insulating elastic material.
References Cited (Backward Citations)
US1825154A
Cited
US1888039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |