Patent US3770158A successfully refreshed from Google Patents.
US3770158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for protecting the environment of a tank against failures thereof
Assignee: Technigaz
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Filing: 1971-10-29
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Granted: 1973-11-06
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Expires: 1991-10-29
Abstract
Abstract A device for protecting the environment of a storage tank against failures thereof, said tank containing liquefied gas at low temperature and at a pressure about atmospheric pressure and being housed in a heat-insulated compartment of a ship hold, said device comprising a fluid-tight, concave dished structure forming a reduced secondary barrier arranged below and about the lower portion of said tank.
Inventors
- 👤 J Alleaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:28
CPC Classifications
B; B63; B63B; B63B25/00; B63B25/02; B63B25/08; B63B25/12; B63B25/16; F; F17; F17C; F17C13/00; F17C13/12; F17C13/126; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/05; F17C2201/052; Y; Y10; Y10S; Y10S220/00; Y10S220/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
207 words
A device for protecting the environment of a storage tank against failures thereof, said tanK serving to contain a liquefied gas at a low temperature and at about atmospheric pressure, being housed in a heat-insulated compartment of a ship''s hold and being supported by fastening and supporting means to extend into said compartment, the inner walls of said compartment being lined with a layer of heat-insulating material with said layer also surrounding the entire tank, said device comprising a concave fluid-tight vat disposed in said compartment below and about the lower portion of said tank and an anti-jet envelope externally surrounding at least the upper portion of said tank, said concave vat being independent of said tank and comprising a thin-walled casing resting directly on said layer of heat-insulating material lining the inner walls of said compartment, said anti-jet envelope conforming in shape substantially to at least the upper portion of said tank and extending at its lower portion into said concave vat, and said envelope comprising thin sheets of metal capable of withstanding low temperatures arranged in non fluid-tight free overlapping relationship and means for securing said sheets to the outer wall of said tank including wooden block members fixedly attached to said tank outer wall.
Claim 2
Independent Claim
207 words
A device for protecting the environment of a storage tank against failures thereof, said tanK serving to contain a liquefied gas at a low temperature and at about atmospheric pressure, being housed in a heat-insulated compartment of a ship''s hold and being supported by fastening and supporting means to extend into said compartment, the inner walls of said compartment being lined with a layer of heat-insulating material with said layer also surrounding the entire tank, said device comprising a concave fluid-tight vat disposed in said compartment below and about the lower portion of said tank and an anti-jet envelope externally surrounding at least the upper portion of said tank, said concave vat being independent of said tank and comprising a thin-walled casing resting directly on said layer of heat-insulating material lining the inner walls of said compartment, said anti-jet envelope conforming in shape substantially to at least the upper portion of said tank and extending at its lower portion into said concave vat, and said envelope comprising thin sheets of metal capable of withstanding low temperatures arranged in non fluid-tight free overlapping relationship and means for securing said sheets to the outer wall of said tank including wooden block members fixedly attached to said tank outer wall.
Claim 3
Dependent Claim
25 words
A device according to claim 1, wherein said anti-jet envelope extends inside of the discontinuities formed by said fastening and supporting means of said tank.
Claim 4
Dependent Claim
74 words
A device according to claim 1, wherein said vat has polyhedral shape which conforms substantially to the polyhedral shape of said compartment, the walls of said vat bearing on the bottom and against the sides of said compartment whereas the angles and corners formed by the junction of said walls of the vat are a rigid self-supporting structure and slightly spaced from the corresponding angles and corners of the walls of said polyhedral compartment.
Claim 5
Dependent Claim
228 words
In combination, a tanker having a compartment in its hold and a tank supported in said compartment and serving to contain liquefied gas at low temperature and at approximately atmospheric pressure, means for supporting said tank in said compartment in spaced relationship from walls defining said compartment, a layer of insulation material lining said walls of said compartment and also surrounding the entire tank, said compartment having less depth than the height of said tank so that an upper portion of said tank projects outwardly of said compartment above the level of said supporting means, a concave fluid-tight vat in said compartment supported by said layer of insulating material therein and underlying the lower portion only of the tank within said compartment, said vat being independent of said tank and comprising thin walled metallic elements resting directly on said layer of insulation material located within said compartment, an anti-jet envelope covering and conforming substantially to the shape of said tank at least at the upper portion thereof, the lower portion of said envelope extending into said vat to a level below the upper level of said vat but leaving the lower portion of said tank bare of said anti-jet envelope, said anti-jet envelope comprising thin metallic sheets capable of withstanding low temperatures disposed in non-fluid tight overlapping relationship, and means for securing said last-named sheets to said tank.
Claim 6
Dependent Claim
228 words
In combination, a tanker having a compartment in its hold and a tank supported in said compartment and serving to contain liquefied gas at low temperature and at approximately atmospheric pressure, means for supporting said tank in said compartment in spaced relationship from walls defining said compartment, a layer of insulation material lining said walls of said compartment and also surrounding the entire tank, said compartment having less depth than the height of said tank so that an upper portion of said tank projects outwardly of said compartment above the level of said supporting means, a concave fluid-tight vat in said compartment supported by said layer of insulating material therein and underlying the lower portion only of the tank within said compartment, said vat being independent of said tank and comprising thin walled metallic elements resting directly on said layer of insulation material located within said compartment, an anti-jet envelope covering and conforming substantially to the shape of said tank at least at the upper portion thereof, the lower portion of said envelope extending into said vat to a level below the upper level of said vat but leaving the lower portion of said tank bare of said anti-jet envelope, said anti-jet envelope comprising thin metallic sheets capable of withstanding low temperatures disposed in non-fluid tight overlapping relationship, and means for securing said last-named sheets to said tank.
Claim 7
Dependent Claim
27 words
The combination as per claim 4 wherein said tank supporting means provides discontinuities in the insulative layer, and wherein said anti-jet envelope lies inside of said discontinuities.
Claim 8
Dependent Claim
70 words
The combination as per claim 4 wherein said compartment has polyhedral shape and said concave vat conforms substantially to the polyhedral shape of said compartment, said thin walled elements of said vat bearing against the bottom of said compartment and its side walls with angular corners defined by abutting edges of said elements joined as a rigid self-supporting structure slightly spaced from corresponding angular corners defined by the polyhedral compartment.
Claim 9
Independent Claim
198 words
A device for protecting the ambient environment againSt leakage failures of a tank containing liquefied gas at low temperature and at about atmospheric pressure, said tank being supported in a concave heat insulated compartment of a ship''s hold, said compartment including an insulative lining layer of heat insulating material covering the walls of said compartment, and said lining layer also surrounding the entire tank, a concave fluid-tight vat within said compartment and supported directly by said lining layer, said vat being independent of said tank and being a thin metallic casing underlying and spaced from the lower portions only of said tank below the support level of said tank in said compartment, an anti-jet envelope surrounding all upper portions of said tank and also a limited portion of the tank below said support level, said anti-jet envelope comprising thin sheets of metal capable of withstanding low temperature conforming to the shape of the tank disposed in fluid-tight free overlapping relationship, and spacer means for securing the sheets of said envelope in spaced relationship to the outer wall of said tank, said spacer means including members secured to said outer wall, and means joining said sheets to said members.
Claim 10
Independent Claim
198 words
A device for protecting the ambient environment againSt leakage failures of a tank containing liquefied gas at low temperature and at about atmospheric pressure, said tank being supported in a concave heat insulated compartment of a ship''s hold, said compartment including an insulative lining layer of heat insulating material covering the walls of said compartment, and said lining layer also surrounding the entire tank, a concave fluid-tight vat within said compartment and supported directly by said lining layer, said vat being independent of said tank and being a thin metallic casing underlying and spaced from the lower portions only of said tank below the support level of said tank in said compartment, an anti-jet envelope surrounding all upper portions of said tank and also a limited portion of the tank below said support level, said anti-jet envelope comprising thin sheets of metal capable of withstanding low temperature conforming to the shape of the tank disposed in fluid-tight free overlapping relationship, and spacer means for securing the sheets of said envelope in spaced relationship to the outer wall of said tank, said spacer means including members secured to said outer wall, and means joining said sheets to said members.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |