Pipe lining apparatus

Details Pipe lining apparatus Pipe lining apparatus

1990-12-12

1992-05-12

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Including both heating and cooling means

4253871, 425392, 425393, 425503, 425508, B29C 3500

Patent

active

051122111

ABSTRACT:
Apparatus for inserting a generally U-shaped liner into a pipe and reforming the U-shaped liner into a generally cylindrical cross-section to line the pipe includes winches for pulling the U-shaped liner through the pipe, pigs for cleaning the pipe, manifolds to connection at opposite ends of the pipe and wedge-shaped expansion members for initially mechanically reforming the ends of the liner projecting from the pipe. The wedge-shaped members include bores for communicating fluid at elevated temperature and pressure within the liner for setting the liner in generally cylindrical configuration against the pipe wall. A flaring tool is used to flare the opposite ends of the liner.

REFERENCES:
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patent: 3359599 (1967-12-01), Martin et al.
patent: 3662045 (1972-05-01), Tierling
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patent: 4985196 (1991-01-01), LeDoux et al.
patent: 4986951 (1991-01-01), LeDoux et al.

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