Patent US4126976A successfully refreshed from Google Patents.
US4126976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete tank
Assignee: Individual
•
Filing: 1977-12-22
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Granted: 1978-11-28
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Expires: 1997-12-22
Abstract
Abstract A prestressed concrete tank comprising a wall of precast concrete panels, cast continuous beams surrounding the wall of panels, the beams including metal prestressing means, and vertically spaced liquid barriers positioned between the inside of the tank and the prestressing means.
Inventors
- 👤 Francis X. Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:27
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
A prestressed concrete tank comprising: a wall of precast concrete panels, a plurality of vertically spaced-apart cast continuous beams surrounding said wall of panels, said beams including metal means for prestressing said wall, and a plurality of vertically spaced-apart liquid barriers corresponding to said vertically spaced-apart beams, each of said barriers being positioned between the inside of said tank and the prestressing means of its corresponding beam.
Claim 2
Dependent Claim
67 words
A prestressed concrete tank comprising: a wall of precast concrete panels, a plurality of vertically spaced-apart cast continuous beams surrounding said wall of panels, said beams including metal means for prestressing said wall, and a plurality of vertically spaced-apart liquid barriers corresponding to said vertically spaced-apart beams, each of said barriers being positioned between the inside of said tank and the prestressing means of its corresponding beam.
Claim 3
Dependent Claim
22 words
The tank of claim 1 wherein each of said barriers has a height no greater than the height of its corresponding beam.
Claim 4
Dependent Claim
27 words
The tank of claim 2 wherein each of said barriers has a height no less than the vertical extent of the prestressing means of its corresponding beam.
Claim 5
Dependent Claim
16 words
The tank of claim 3 wherein each of the barriers has a height of 2 feet.
Claim 6
Dependent Claim
18 words
The tank of claim 1 wherein said barriers are steel and horizontally span said panels in one piece.
Claim 7
Dependent Claim
23 words
The tank of claim 1 wherein each of said barriers is positioned between said panels and the prestressing means of its corresponding beam.
Claim 8
Dependent Claim
14 words
The tank of claim 6 wherein said barriers are set in said precast panels.
Claim 9
Dependent Claim
43 words
The tank of claim 7 wherein said prestressing means is steel wire, said barriers have circumferentially spaced narrow integral ribs, said wire bearing against the ribs and being separated from the main barrier wall, and said beams comprise mortar cast around said wire.
Claim 10
Dependent Claim
27 words
The tank of claim 1 wherein said beams have reglets adjacent their upper ends to prevent surface water from seeping downwardly between said panels and said beams.
Claim 11
Dependent Claim
23 words
The tank of claim 1 wherein said beams have reglets adjacent their lower ends to prevent leakage of cast material from said beams.
Claim 12
Dependent Claim
24 words
The tank of claim 1 wherein the upper ends of said beams are beveled downwardly and outwardly to drain surface water from said beams.
Claim 13
Dependent Claim
51 words
The method of constructing a tank of claim 1, comprising the steps of precasting panels setting in said panels liquid barriers, erecting said precast panels to form the wall of said tank, wrapping metal prestressing means in tension around said tank, casting material around said tensioned prestressing means to form beams.
Claim 14
Dependent Claim
55 words
The method of constructing a tank of claim 8, comprising the steps of precasting panels setting in said panels liquid barriers having ribs, erecting said precast panels to form the wall of said tank, wrapping prestressing wire in tension around said tank wall on said ribs, casting mortar around said tensioned wire to form beams.
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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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |