Patent US4021982A successfully refreshed from Google Patents.
US4021982A
Expired / Lapsed
US
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Heat insulating wall structure for a fluid-tight tank and the method of making same
Assignee: Technigaz
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Filing: 1976-06-17
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Granted: 1977-05-10
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Expires: 1996-06-17
Abstract
Abstract A fluid-tight heat insulated tank wall structure comprising a rigid outer wall, an inner membrane-like impervious primary barrier wall and an intermediate heat insulating material carrying said inner wall and consisting of: an inner end layer of balsa wood or polyvinyl chloride, one composite laminated layer of sandwich panels composed of two spaced plywood plated and filling material interposed therebetween; and an outer end layer of cellular material.
Inventors
- 👤 Michel Kotcharian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:20
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/02; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C3/04; F17C2201/00; F17C2201/05; F17C2201/052; F17C2203/00; F17C2203/01; F17C2203/011; F17C2203/012; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0345; F17C2203/035; F17C2203/0354; F17C2203/0375; F17C2203/0379; F17C2203/0383; F17C2203/06; F17C2203/0602; F17C2203/0612; F17C2203/0626; F17C2203/0631; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2203/0658; F17C2203/0663; F17C2209/00; F17C2209/21; F17C2209/2109; F17C2209/2118; F17C2209/22; F17C2209/228; 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: 23
Claim 1
Independent Claim
245 words
A fluid-tight and heat insulating wall structure for a fluid-tight heat insulated tank, comprising a self-supporting and rigid outer wall, a fluid-tight primary barrier consisting of a substantially flexible membrane-like impervious inner wall spaced from said outer wall; and an intermediate heat insulating structure, a fluid-tight secondary barrier embedded in said heat insulating structure, fastening means to secure said intermediate heat insulating structure to said inner wall and to said primary barrier, said intermediate heat-insulating structure and said fastening means being capable of transferring loads from said primary barrier to said outer wall, said primary barrier being applied against and supported by said intermediate heat insulating structure, said inner wall of said primary barrier being made from thin corrugated sheet metal formed with at least one set of spaced substantially parallel corrugations projecting inwards from the inside only; said intermediate heat insulating structure including from the inside towards the outside; (i) a separating layer of a heat-insulating and load distributing material selected from the group consisting of balsa wood, plywood and rigid cellular materials, said separating layer being in continuous contact with said fluid-tight secondary barrier and secured thereto and comprising at least one set of spaced substantially parallel slots each extending through at least a major part of the thickness of said separating layer and each located substantially at a corrugation of said primary barrier and extending along the said corrugation, (ii) the aforesaid fluid-tight secondary barrier (iii) at least one heat insulating layer.
Claim 2
Dependent Claim
245 words
A fluid-tight and heat insulating wall structure for a fluid-tight heat insulated tank, comprising a self-supporting and rigid outer wall, a fluid-tight primary barrier consisting of a substantially flexible membrane-like impervious inner wall spaced from said outer wall; and an intermediate heat insulating structure, a fluid-tight secondary barrier embedded in said heat insulating structure, fastening means to secure said intermediate heat insulating structure to said inner wall and to said primary barrier, said intermediate heat-insulating structure and said fastening means being capable of transferring loads from said primary barrier to said outer wall, said primary barrier being applied against and supported by said intermediate heat insulating structure, said inner wall of said primary barrier being made from thin corrugated sheet metal formed with at least one set of spaced substantially parallel corrugations projecting inwards from the inside only; said intermediate heat insulating structure including from the inside towards the outside; (i) a separating layer of a heat-insulating and load distributing material selected from the group consisting of balsa wood, plywood and rigid cellular materials, said separating layer being in continuous contact with said fluid-tight secondary barrier and secured thereto and comprising at least one set of spaced substantially parallel slots each extending through at least a major part of the thickness of said separating layer and each located substantially at a corrugation of said primary barrier and extending along the said corrugation, (ii) the aforesaid fluid-tight secondary barrier (iii) at least one heat insulating layer.
Claim 3
Dependent Claim
13 words
Structure according to claim 1 including a joint packing insert filling said slots.
Claim 4
Dependent Claim
30 words
Structure according to claim 1, wherein said separating layer consists of juxtaposed bearing panels, the aforesaid slots being formed by gaps provided between each pair of adjacent such bearing panels.
Claim 5
Dependent Claim
46 words
Structure according to claim 1, wherein said separating layer consists of juxtaposed bearing panels, the aforesaid slots comprising slots formed by gaps provided between each pair of adjacent such bearing panels and slots extending in said bearing panels through a major part of the thickness thereof.
Claim 6
Dependent Claim
19 words
Structure according to claim 1, wherein said heat-insulating layer comprises injected cellular material adhesively bonded to said outer wall.
Claim 7
Dependent Claim
64 words
Structure according to claim 1, wherein said secondary barrier is made from thin corrugated sheet metal formed with at least one set of spaced substantially parallel corrugations projecting outwards from the inside only, the said corrugations of said secondary barrier being substantially parallel to those of said primary barrier and respectively each being in aligned relation to a corresponding corrugation of said primary barrier.
Claim 8
Dependent Claim
27 words
Structure according to claim 1, wherein said secondary barrier is a sheet of epoxy resin reinforced with glass fibre and adhesively bonded to said heat insulating layer.
Claim 9
Dependent Claim
140 words
Structure according to claim 1 including metallic fastening means securing the aforesaid primary and secondary barriers to each other at spaced discrete points through said separating layer, each said metallic fastening means comprising a relatively fine rod and a base plate integral with one end of said rod, said base plate being secured to the inner face of said secondary barrier, a nipping piece for engaging the free opposite end of said rod, and said nipping piece being secured to the outer face of said primary barrier and comprising a a cup-shaped element affixed to said primary barrier with its peripheral skirt edge, the bottom wall of said element having a through-hole with edges creased inwards of said cup-like member to form closely spaced springy clamping tongues for nipping said rod when its free end is inserted into said hole.
Claim 10
Dependent Claim
36 words
Structure according to claim 1, wherein said separating layer is lined on its inner face with a load-distributing layer consisting of plates of a material selected from the group consisting of plywood and stiff synthetic material.
Claim 11
Dependent Claim
114 words
Structure according to claim 1, wherein two superposed heat-insulating layers are provided and comprise an outer heat-insulating layer in contact with the outer wall and a second heat-insulating layer in contact with said secondary barrier, said outer heat-insulating layer consisting of a wooden grid formed by a lattice of joists distributed in two sets of parallel spaced joists crossing each other substantially at right angles and stud-bolts securing said spaced joists to said outer wall, a relatively thin stuffing material being interposed between said joists and said outer wall, and a cellular material filling spaces between said joists, the inner one of said two superposed heat insulating layers being adhesively bonded to said joists.
Claim 12
Dependent Claim
215 words
Structure according to claim 1 wherein said secondary barrier and said heat-insulating layer consist of a plurality of adjacent panels of at least approximately rectangular shapes, packing joint inserts on the side of the outer surface of said heat insulating layer separately adjacent panels and rigid welt-like butt-straps located on the side of said secondary barrier, so as to cover said packing joint inserts, each said butt-strap comprising an outer layer of the same material as said heat insulating layer and an inner layer of the same material as said separating layer and being wider than said outer layer, so as to form two shoulders therewith, the inner surface of said outer layer being in substantially flush registering and aligned relationship with the inner surface of said panels, said inner layer having substantially the same thickness as said separating layer, being substantially in flush registering and aligned relationship with the surfaces of said separating layer and being continuously separated from said outer layer by a portion of said secondary barrier which extends onto said shoulders and which is in bonding relationship with said shoulders, the edges of the inner surface of said panels being in bonding relationship with said shoulders to provide in combination a continuous secondary barrier with said portion of said secondary barrier.
Claim 13
Dependent Claim
33 words
Structure according to claim 11, wherein the outer layer of said butt-strap comprises a load-distributing lining consisting of plates of a material selected from the group consisting of plywood and stiff synthetic material.
Claim 14
Dependent Claim
74 words
Structure according to claim 1, wherein said secondary barrier and said heat insulating layer comprise at least one panel comprising a pair of inner and outer rigid plates made from a material selected from the group consisting of plywood and rigid synthetic material, said inner plate constituting said secondary barrier and being separated from said outer plate and by an intermediate filling material between and in bonding relationship with said inner and outer plates.
Claim 15
Dependent Claim
61 words
Structure according to claim 13, wherein said fastening means comprise metallic stud-bolt and nut assemblies, each aforesaid panel being secured to said outer wall, the said stud-bolts extending through said filling material and the said nuts bearing against the inner face of said outer rigid plate of said panel, and cores of cellular material filling holes provided for applying said nuts.
Claim 16
Dependent Claim
49 words
Structure according to claim 13, wherein said filling material consists of at least one layer of a material selected from the group consisting of balsa wood and cellular material whereas said rigid plates are made from plywood and said outer rigid plate is thicker than said inner rigid plate.
Claim 17
Dependent Claim
50 words
Structure according to claim 13, wherein said secondary barrier and said heat-insulating layer consist of a plurality of adjacent aforesaid panels of at least approximately rectangular shapes, intermediate packing joint inserts supporting said panels and plywood covering strips lining the inner sides of said inserts and forming welt-like butt straps.
Claim 18
Dependent Claim
43 words
Structure according to claim 15, wherein each aforesaid panel comprises on at least two opposite edges thereof slanting inward tapering edge faces so that each aforesaid intermediate packing joint insert has a substantially trapezoidal cross-sectional contour the big base thereof being located inwards.
Claim 19
Dependent Claim
79 words
Structure according to claim 1 including fastening means securing said secondary barrier to said primary barrier at spaced discrete points through said separating layer, each said fastening means comprising a heat-insulating fastener-holding block extending through the whole thickness of said separating layer and being in bonding relationship with said secondary barrier on the whole area common to said block and said secondary barrier, and a metallic element welded to said primary barrier and rigidly connected to said fastener-holding block.
Claim 20
Dependent Claim
24 words
Structure according to claim 18 including stud bolt means secured in said block whereby said metallic element is rigidly connected to said fastener-holding block.
Claim 21
Dependent Claim
45 words
Structure according to claim 18 including an internally threaded sleeve rigidly connected to said block, extending into an opening thereof, and a screw secured into said sleeve and having a head embedded into said block and extending into said opening from the opposite side thereof.
Claim 22
Dependent Claim
99 words
Structure according to claim 18, wherein said fastener-holding block consists of two superimposed members, screws interconnecting said members, the said metallic element being a round-shaped and hollow anchoring element located in an opening of the inner most member of said fastener-holding block and having an outer wall provided with an anchoring peripheral edge located in a recess of the said opening, a round-shaped side wall and an inner wall the outer surface of which is flush with that of said block and constitutes that part of the metallic element by which the latter is welded to the primary barrier.
Claim 23
Dependent Claim
16 words
Structure according to claim 21, wherein said round-shaped anchoring element is filled with a heat-insulating material.
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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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |