US4012822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for sealing and repairing leaks in ruptured containers
Assignee: Environmental Protection Agency
•
Filing: 1975-05-29
•
Granted: 1977-03-22
•
Expires: 1995-05-29
Abstract
Abstract A system for sealing and repairing leaks in ruptured containers whereby an applicator including an open-celled sponge body is inserted into the rupture and the two interacting components of a binary fluid foam composition are mixed and injected into the sponge body, thereby expanding and forming a foam composite with the latter against the rupture to effectively seal and repair same upon curing of the foam in situ.
Inventors
- 👤 John J. Vrolyk
- 👤 Robert W. Melvold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:26
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/182; B29C44/184; B29C73/00; Y; Y10; Y10S; Y10S138/00; Y10S138/09; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49732; Y10T29/49746; Y10T29/49805; Y10T29/53; Y10T428/00; Y10T428/20; Y10T428/23; Y10T428/233
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A system for sealing and repairing a rupture in a container, wherein the system comprises, in combination: a. storage means for storing a sealant material, b. displacement means for expelling the sealant material from the storage means, c. an open-celled sponge body for inserting into the rupture, and d. conduit means providing communication between the storage means and the sponge body for conveying the expelled sealant material into the sponge body to thereby seal and repair the rupture.
Claim 2
Independent Claim
78 words
A system for sealing and repairing a rupture in a container, wherein the system comprises, in combination: a. storage means for storing a sealant material, b. displacement means for expelling the sealant material from the storage means, c. an open-celled sponge body for inserting into the rupture, and d. conduit means providing communication between the storage means and the sponge body for conveying the expelled sealant material into the sponge body to thereby seal and repair the rupture.
Claim 3
Dependent Claim
33 words
The system of claim 1 wherein the sealant material includes a binary fluid for forming plastic foam and the storage means includes means for separately storing the individual components of the binary fluid.
Claim 4
Dependent Claim
21 words
The system of claim 2 further including mixing means for receiving and mixing the expelled binary fluid components for chemical interaction.
Claim 5
Dependent Claim
40 words
The system of claim 2 wherein: a. the storage means includes a cylinder provided with two separate compartments, and b. the displacement means includes a piston in each cylinder and a common piston rod for simultaneous actuation of the pistons.
Claim 6
Dependent Claim
15 words
The system of claim 4 further including a pressurized gas source for actuating the pistons.
Claim 7
Dependent Claim
41 words
The system of claim 1 wherein the sponge body includes: a. a tubular core member provided with a plurality of perforations in the wall thereof, and b. an expandable outer covering layer surrounding and enclosing the exterior of the sponge body.
Claim 8
Dependent Claim
34 words
The system of claim 6 further including a valve means carried by the core member for controlling the flow of sealant material into the core member and through the perforations into the sponge body.
Claim 9
Dependent Claim
17 words
The system of claim 6 wherein the expandable outer covering layer includes a coating of silicone rubber.
Claim 10
Dependent Claim
15 words
The system of claim 6 wherein the expandable outer covering layer includes a rubber sleeve.
Claim 11
Dependent Claim
12 words
The system of claim 2 wherein the plastic foam is polyurethane foam.
Claim 12
Dependent Claim
23 words
The system of claim 6 wherein the sponge body further includes means for venting air displaced by the introduction of sealant material therein.
References Cited (Backward Citations)
US782290A
Cited
US1382397A
Cited
US2646707A
Cited
US3144049A
Cited
US3686047A
Cited
US3772113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |