System and method for slipliner renovation of semi-elliptical co

Details System and method for slipliner renovation of semi-elliptical co System and method for slipliner renovation of semi-elliptical co

1994-07-05

1995-10-17

Bryant, III, James E.

Pipes and tubular conduits

Repairing

Patches

138 97, 138157, 138162, 405151, F16L 5518

Patent

active

054581559

ABSTRACT:
A slipliner for renovating a semi-elliptical conduit such as a masonry sewer line. The bottom of a semi-rigid cylindrical liner pipe is split longitudinally and a floor panel is mounted across the bottom of the pipe to spread the edges of the cut. This bends the lower side walls of the pipe outwardly so that these correspond to the generally vertical side walls of the conduit, while the upper portion of the pipe remains generally cylindrical so as to correspond to the top wall of the conduit and the floor panel corresponds to the generally horizontal bottom wall of the conduit. The slipliner of the present invention is thus much more closely matched in shape to the semi-elliptical conduit than would be a conventional, cylindrical liner.

REFERENCES:
patent: 268571 (1882-12-01), Thompson
patent: 442162 (1890-12-01), Young
patent: 633037 (1899-09-01), Pfahler
patent: 1071102 (1913-08-01), Shannon
patent: 4812084 (1989-03-01), Wagner et al.

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