Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Uniting preform member with molding material
Patent
1978-06-21
1980-09-16
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Uniting preform member with molding material
264 36, 264265, 405264, 405267, E02D 314, E04H 702
Patent
active
042229758
ABSTRACT:
The apparatus to practice the method of this invention is particularly effective in repairing underground gasoline storage tanks which have fractures or perforations directly underneath the filler pipe. A boring and injection tool projects down the filler pipe and perforates and seals adjacent the bottom of the storage tank. A soil stabilizer is injected into the area adjacent and exterior of the underground storage tank. The chemicals project into the pea gravel surrounding the tank and polymerize or solidify to stop infiltration or exfiltration. A sanding tool is next utilized to remove the glaze from the interior of the fiber glass tank. Water is evacuated from the tank and an air jet cleaning tool is utilized to remove the film of water from the area to be repaired. Next, an epoxy injection tool is utilized to deposit epoxy over the area to be repaired. Epoxy solidifies to the inner wall of the tank repairing the perforated or fractured area.
REFERENCES:
patent: 3293864 (1966-12-01), Hagius
patent: 3351289 (1967-11-01), Demaison
patent: 3351460 (1967-11-01), Demaison
patent: 3814645 (1974-06-01), Fletcher
patent: 3950461 (1976-04-01), Levens
patent: 4022935 (1977-05-01), Kinney
patent: 4112690 (1978-09-01), Hosoya
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