Coating processes – Restoring or repairing
Patent
1975-03-12
1977-05-10
Herbert, Jr., Thomas J.
Coating processes
Restoring or repairing
138 97, 138 98, 427142, 427236, 427239, 427421, 427426, B32B 3500
Patent
active
040229351
ABSTRACT:
This specification describes a process and apparatus for closing leaks and spraying a sealant composition to interior walls of an underground gasoline tank such as is used in retail gasoline service stations. A gas tank suspected of leaks is emptied of stored gas and purged with compressor air applied thru a valve control and pipe conduit threadly inserted in the conventional fill pipe of the tank. The pipe conduit includes a means defining an aperture at the lower extremity of the conduit which extends into the tank interior. An explosion safety level meter is attached to the pipe conduit for providing a humanly detectable signal of the environment within the tank. An excavation enables a craftsperson to cut an access port through the tank wall for entering the tank interior, cleaning-up residue, sandblasting the interior walls, and spraying a sealant composition of thixotropic polyester resin and a catalyst onto the sandblasted walls.
REFERENCES:
patent: 3578479 (1971-05-01), Packo
patent: 3772113 (1973-11-01), Patrick
patent: 3930068 (1975-12-01), Sloan
Kinney Paul W.
Kirk Carl Walter
Herbert, Jr. Thomas J.
Hess Bruce H.
Padden Frederick W.
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