Patent US2255478A successfully refreshed from Google Patents.
Patent US3824751A successfully refreshed from Google Patents.
US3824751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precast concrete wall structure for waste treatment tanks
Assignee: Preload Technology Inc
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Filing: 1972-06-23
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Granted: 1974-07-23
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Expires: 1992-06-23
Abstract
Abstract A construction for a waste treatment tank comprised of a plurality of precast concrete panels extending to approximately the full height of the tank is shown. Each of the precast concrete panels has a plurality of horizontal stressing tendons which are freely movable and pass through the panels and through continuous vertical edge plates on either side of the panels. Coupling plates attached to the edge plates are butt-welded to one another at their junctions. The tension in the prestressing tendons may be controlled at any time before, during or after the erection of the tank and the construction configuration provides easy access to the prestressing tendons. The configuration is particularly well suited for the through passage of piping connection and for the attachment of internal structure to the steel coupling plates.
Inventors
- 👤 C Shelander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:23
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6991
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
In a tank having a substantially cylindrical wall comprised of a plurality of precast, individually prestressed concrete panels, alternately positioned with steel wall members, the combination comprising: a. a plurality of precast, individually prestressed concrete panels, each panel having a plurality of horizontal stressinG tendons passing substantially freely therethrough, each of said plurality of tendons passing through and being retained in tension against metal edge plates fastened to both vertical side edges of each of said concrete panels; and b. metal wall members fastened to said metal edge plates at the inner sides thereof and extending substantially circumferentially of said tank wall, said wall members being butt-welded to one another at their mating extensions to form said tank.
Claim 2
Dependent Claim
118 words
In a tank having a substantially cylindrical wall comprised of a plurality of precast, individually prestressed concrete panels, alternately positioned with steel wall members, the combination comprising: a. a plurality of precast, individually prestressed concrete panels, each panel having a plurality of horizontal stressinG tendons passing substantially freely therethrough, each of said plurality of tendons passing through and being retained in tension against metal edge plates fastened to both vertical side edges of each of said concrete panels; and b. metal wall members fastened to said metal edge plates at the inner sides thereof and extending substantially circumferentially of said tank wall, said wall members being butt-welded to one another at their mating extensions to form said tank.
Claim 3
Dependent Claim
136 words
In a tank having a substantially cylindrical wall comprised of a plurality of precast, individually prestressable concrete panels, alternatively positioned with steel wall members, the combination comprising: a. a plurality of precast, individually prestressable, concrete panels, each panel having a plurality of horizontal stressing tendons passing substantially freely therethrough, each of said plurality of tendons passing through and being retained in tension against metal edge plates fastened to both vertical side edges of said concrete panels; and b. metal wall members fastened to said metal edge plates at the inner sides thereof and extending substantially circumferentially of said tank wall, said wall members being butt-welded to one another at their mating extensions to form said tank, at least one of said wall members being provided with pipe connection fittings for receiving piping associated with said tank.
Claim 4
Dependent Claim
136 words
In a tank having a substantially cylindrical wall comprised of a plurality of precast, individually prestressable concrete panels, alternatively positioned with steel wall members, the combination comprising: a. a plurality of precast, individually prestressable, concrete panels, each panel having a plurality of horizontal stressing tendons passing substantially freely therethrough, each of said plurality of tendons passing through and being retained in tension against metal edge plates fastened to both vertical side edges of said concrete panels; and b. metal wall members fastened to said metal edge plates at the inner sides thereof and extending substantially circumferentially of said tank wall, said wall members being butt-welded to one another at their mating extensions to form said tank, at least one of said wall members being provided with pipe connection fittings for receiving piping associated with said tank.
Claim 5
Dependent Claim
131 words
In a tank having a substantially cylindrical wall comprised of a plurality of precast, individually prestressable concrete panels, alternately positioned with steel wall members, the combination comprising: a. a plurality of precast, individually prestressable, concrete panels, each panel having a plurality of horizontal stressing tendons passing substantially freely therethrough, each of said plurality of tendons passing through and being retained in tension against metal edge plates fastened to both vertical side edges of said concrete panels; b. metal wall members fastened to said metal edge plates at the inner sides thereof and extending substantially circumferentially of said tank wall, said wall members being butt-welded to one another at their mating extensions to form said tank; and c. a circumferential launderer fastened to the upper interior surfaces of said metal wall members.
Claim 6
Dependent Claim
131 words
In a tank having a substantially cylindrical wall comprised of a plurality of precast, individually prestressable concrete panels, alternately positioned with steel wall members, the combination comprising: a. a plurality of precast, individually prestressable, concrete panels, each panel having a plurality of horizontal stressing tendons passing substantially freely therethrough, each of said plurality of tendons passing through and being retained in tension against metal edge plates fastened to both vertical side edges of said concrete panels; b. metal wall members fastened to said metal edge plates at the inner sides thereof and extending substantially circumferentially of said tank wall, said wall members being butt-welded to one another at their mating extensions to form said tank; and c. a circumferential launderer fastened to the upper interior surfaces of said metal wall members.
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |