Apparatuses for producing tight joints or seals in underground p

Details Apparatuses for producing tight joints or seals in underground p Apparatuses for producing tight joints or seals in underground p

1977-11-30

1979-12-18

Beck, Shrive P.

Coating apparatus

With indicating, testing, inspecting, or measuring means

118254, 118306, 118408, 118DIG10, 118670, 427236, 427239, B05C 1100

Patent

active

041788753

ABSTRACT:
A method of rejoining seals at joints in underground pipelines comprises moving a carriage inside a pipeline beyond a joint to be reformed and rapidly spraying a synthetic polymerizable material to cover the joint from a spraying head mounted on the carriage and displaced relatively slowly with respect thereto. The carriage has means for propelling it on rolling members, for anchoring it in the pipeline, and for moving an arm on which the spraying head is mounted.

REFERENCES:
patent: 2108319 (1938-02-01), Perkins
patent: 3017855 (1962-01-01), Ranker
patent: 3106491 (1963-10-01), Leibner
patent: 3245824 (1966-04-01), Treat et al.
patent: 3703947 (1972-11-01), Landrum
patent: 3878811 (1975-04-01), Rombach
patent: 3886893 (1975-06-01), Takeuchi
patent: 3960644 (1976-06-01), McFadden
patent: 4058258 (1977-11-01), Rosen et al.
patent: 4092950 (1978-06-01), Hart

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