US3745775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater in situ placement of concrete
Assignee: United States Department of the Navy
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Filing: 1971-11-22
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Granted: 1973-07-17
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Expires: 1991-11-22
Abstract
Abstract A flexible container filled with dry concrete which will quickly set upon the addition of moisture. Because of the container''s flexibility, it may be formed into any desired container to fit available space after which moisture is added.
Inventors
- 👤 L Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
C; C04; C04B; C04B40/00; C04B40/06; C04B40/0608; E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; E02B3/127; E02D; E02D15/00; E02D15/08; C04B2103/00; C04B2103/0068; C04B2103/0077; C04B2111/00; C04B2111/74
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
A flexible device for the subaqueous emplacement of concrete comprising: a bag having a double wall, said double wall forming attached but separate inner and outer wall compartments; vents positioned in each of said inner and outer compartments, said vents adapted to provide gas and liquid access from the exterior to the interior thereof; valves controlling the opening into said vents; thus upon inflating the bag wall compartments, the bag retains a form and is neutrally buoyant; a dry concrete mix positioned in the bag chamber; a bag vent extending through said double wall into said chamber of the bag and; a bag vent valve controlling the opening in said bag vent; said bag vent being opened aFter emplacement of the bag to permit water to enter and mix with the cement material therein.
Claim 2
Dependent Claim
134 words
A flexible device for the subaqueous emplacement of concrete comprising: a bag having a double wall, said double wall forming attached but separate inner and outer wall compartments; vents positioned in each of said inner and outer compartments, said vents adapted to provide gas and liquid access from the exterior to the interior thereof; valves controlling the opening into said vents; thus upon inflating the bag wall compartments, the bag retains a form and is neutrally buoyant; a dry concrete mix positioned in the bag chamber; a bag vent extending through said double wall into said chamber of the bag and; a bag vent valve controlling the opening in said bag vent; said bag vent being opened aFter emplacement of the bag to permit water to enter and mix with the cement material therein.
Claim 3
Dependent Claim
191 words
A flexible device having a dry concrete mix positioned therein and designed for the subaqueous emplacement of concrete comprising: a bag having a double wall, said wall forming attached but separate inner and outer wall compartments; means located in each of said inner and outer compartments to provide controlled access from the exterior to the interior thereof; thus upon inflating said bag wall compartments, the bag retains a form and is neutrally buoyant; bag venting means located in said bag double wall and adapted to provide controlled access from the exterior to the interior of the chamber in said bag; said means positioned in said inner and outer compartments to provide controlled access thereto and the bag venting means include. vents located in each of said inner and outer compartments with cooperating valves to control the openings therein and; a vent located in said double wall of the bag and extending into the bag chamber, said vent having a valve to control the opening therein; thus when the bag is positioned at its underwater location said bag venting means is opened to allow water to mix with the dry concrete therein.
Claim 4
Dependent Claim
191 words
A flexible device having a dry concrete mix positioned therein and designed for the subaqueous emplacement of concrete comprising: a bag having a double wall, said wall forming attached but separate inner and outer wall compartments; means located in each of said inner and outer compartments to provide controlled access from the exterior to the interior thereof; thus upon inflating said bag wall compartments, the bag retains a form and is neutrally buoyant; bag venting means located in said bag double wall and adapted to provide controlled access from the exterior to the interior of the chamber in said bag; said means positioned in said inner and outer compartments to provide controlled access thereto and the bag venting means include. vents located in each of said inner and outer compartments with cooperating valves to control the openings therein and; a vent located in said double wall of the bag and extending into the bag chamber, said vent having a valve to control the opening therein; thus when the bag is positioned at its underwater location said bag venting means is opened to allow water to mix with the dry concrete therein.
Claim 5
Dependent Claim
25 words
The device of claim 2 wherein the double wall having separate inner and outer compartments is present on less than all sides of said bag.
Claim 6
Dependent Claim
39 words
The device of claim 2 wherein: a vibrator finger is incorporated into the chamber of said bag, said vibrator finger adapted to be attached to a vibrator generator when increased mixing of the concrete mix and water is required.
Claim 7
Dependent Claim
30 words
The device of claim 2 wherein each flexible bag contains interlocking key connections so as to permit adjacent bags to be keyed together over large expanses of the ocean floor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |