US4015383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete tank of precast concrete panels with pretensioning beam means
Assignee: Individual
•
Filing: 1975-05-09
•
Granted: 1977-04-05
•
Expires: 1995-05-09
Abstract
Abstract A tank constructed of either cast-in-place concrete, or of precast panels of concrete which are separated from each other around the periphery of the tank with the open spaces between the panels being filled with concrete filler units poured in place. One or more collar-like horizontally-lying concrete beams surround the wall of the tank and reinforce it. Each beam is reinforced by one or more tendons encased within the beam.
Inventors
- 👤 Francis X. Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:34
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/18; E04H7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A tank wall comprising: a multiplicity of precast panels of concrete, laterally spaced-apart over their entire thickness, and vertically one-piece integral over the entire height of said wall, cast concrete filler units filling the entire spaces between said panels, a plurality of vertically spaced-apart cast continuous circular concrete beams contiguous with said panels, said beams forming horizontal collars surrounding said wall to reinforce said wall, and metal reinforcing means surrounding said wall and covered by the concrete of said beams, said reinforcing means being in tension while the tank formed by said wall is empty, thereby to stress said wall.
Claim 2
Dependent Claim
100 words
A tank wall comprising: a multiplicity of precast panels of concrete, laterally spaced-apart over their entire thickness, and vertically one-piece integral over the entire height of said wall, cast concrete filler units filling the entire spaces between said panels, a plurality of vertically spaced-apart cast continuous circular concrete beams contiguous with said panels, said beams forming horizontal collars surrounding said wall to reinforce said wall, and metal reinforcing means surrounding said wall and covered by the concrete of said beams, said reinforcing means being in tension while the tank formed by said wall is empty, thereby to stress said wall.
Claim 3
Dependent Claim
38 words
The tank wall of claim 1 in which said metal reinforcing means is spaced away from said panels by circumferentially separated spacers, and the concrete of said concrete beams completely surrounds said metal reinforcing means between said spacers.
Claim 4
Dependent Claim
17 words
The tank wall of claim 2 in which said metal reinforcing means is a multiplicity of tendons.
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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) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |