US3683574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical tank for containing high-pressure fluids
Assignee: HOCKTIEF AG fur HOCH und TIEFB
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Filing: 1970-05-18
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Granted: 1972-08-15
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Expires: 1990-05-18
Abstract
Abstract A tank designed to contain high-pressure fluid, e.g. in a nuclear reactor, has a peripheral wall composed of concentrically nested concrete shells individually prestressed by surrounding wire coils; the several shells are separated by interposed antifriction layers preventing the transmission of substantial shear stresses therebetween. The top and bottom of the tank are formed by nested incurved concrete bowls, separated by antifriction layers, bearing upon stepped annular shoulders in an upper and a lower annular header secured by vertical tension cables to the peripheral wall.
Inventors
- 👤 Franz Vaessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:01
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20; G; G21; G21C; G21C13/00; G21C13/08; G21C13/093; G21C13/0933; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
A tank for the containment of a high-pressure fluid, comprising a cylindrically shaped peripheral wall and a pair of end walls complementing said peripheral wall to a closed vessel; said peripheral wall consisting essentially of a multiplicity of concentrically nested concrete shells, individual prestressing means for said shell resisting radially outward deformation, and antifriction means interposed between said shells for preventing the transmission of major shear stresses therebetween.
Claim 2
Dependent Claim
68 words
A tank for the containment of a high-pressure fluid, comprising a cylindrically shaped peripheral wall and a pair of end walls complementing said peripheral wall to a closed vessel; said peripheral wall consisting essentially of a multiplicity of concentrically nested concrete shells, individual prestressing means for said shell resisting radially outward deformation, and antifriction means interposed between said shells for preventing the transmission of major shear stresses therebetween.
Claim 3
Dependent Claim
20 words
A tank as defined in claim 1 wherein said prestressing means comprises an elastic sheath enveloping each of said shells.
Claim 4
Dependent Claim
24 words
A tank as defined in claim 2 wherein said sheaths are formed from steel wire wound in a multiplicity of turns about each shell.
Claim 5
Dependent Claim
25 words
A tank as defined in claim 1 wherein said antifriction means comprises at least one layer of sheet material inserted between any two adjoining shells.
Claim 6
Dependent Claim
20 words
A tank as defined in claim 1 wherein at least some of said shells are peripherally subdivided into partcylindrical segments.
Claim 7
Dependent Claim
27 words
A tank as defined in claim 1 wherein at least some of said shells are axially subdivided into rings forming stacked annular sections of said peripheral wall.
Claim 8
Dependent Claim
29 words
A tank as defined in claim 6 wherein said rings are provided with axially extending channels, further comprising tensioned tie rods traversing said channels for holding said sections together.
Claim 9
Dependent Claim
33 words
A tank as defined in claim 1 wherein said peripheral wall terminates axially in at least one annular header of solid peripherally prestressed concrete surrounding the corresponding end wall in stress-transmitting relationship therewith.
Claim 10
Dependent Claim
22 words
A tank as defined in claim 8 wherein said peripheral wall is provided with anchor means engaging said header under axial stress.
Claim 11
Dependent Claim
41 words
A tank as defined in claim 9 wherein said corresponding end wall consists essentially of a multiplicity of nested bowl-shaped concrete layers with interposed antifriction means, said layers having circular rims bearing upon the inner peripheral surface of said annular header.
Claim 12
Dependent Claim
43 words
A tank as defined in claim 10 wherein said inner peripheral surface has a sawtooth profile defining a multiplicity of frustoconical zones centered on the cylinder axis, said layers being generally spherically curved along radii substantially coinciding with the generatrices of said zones.
Claim 13
Dependent Claim
28 words
A tank as defined in claim 1 wherein said end walls are inwardly curved bowls surrounded by respective axial extremities of said peripheral wall in stress-transmitting relationship therewith.
References Cited (Backward Citations)
US3443631A
Cited
US3397503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |