Method and apparatus for generating foam within a pipe

Details Method and apparatus for generating foam within a pipe Method and apparatus for generating foam within a pipe

1992-04-24

1993-05-25

Stinson, Frankie L.

Cleaning and liquid contact with solids

Apparatus

With plural means for supplying or applying different fluids...

134167C, 134168C, 134169C, 261DIG26, B08B 902

Patent

active

052131203

ABSTRACT:
A foam generator is provided for generating a treatment foam within a pipe, such as a sewer pipe, in need of treatment. The foam generator includes a foam generating head having a first perforated conduit for carrying a fluid such as compressed air and a second perforated conduit surrounding said first conduit for carrying a fluid such as a liquid which contains a foaming agent and a treatment chemical. A wicking material surrounds the first and second conduits in the foam generating head and receives the compressed air and liquid from the conduits and causes the production of a foam. A pressure casing can surround the foam generating head for delivering the foam under increased pressure to coat an inner wall surface of the pipe.

REFERENCES:
patent: 3419082 (1968-12-01), O'Regan et al.
patent: 3874926 (1975-04-01), Horne et al.
patent: 4103876 (1978-08-01), Hasselman, Jr. et al.
patent: 4730676 (1988-03-01), Luers et al.
patent: 4981524 (1991-01-01), Waite

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