Lining system and methods for installing plastic liners in a pipe
OwnerIvan C. Mandichinventor
Life of this patent
Estimating the term…
Abstract
A method for installing plastic liners in pipes includes the steps of providing a plurality of cylindrical tubular liners of plastic material of predetermined diameters. Ribs extend radially between the liners. The liners are deformed or collapsed to reduced overall diameters. The liners are introduced into the pipe. The cylindrical shapes of the liners in the pipe are then restored with the ribs spacing the liners one from the other.
Claims32
A method of lining a pipe, comprising the steps of:
- providing a first tubular liner of plastic material deformed from a generally cylindrical shape having an external diameter which corresponds generally to the internal diameter of the pipe, to a reduced diameter enabling reception of the deformed lining in the pipe;
- providing a second tubular liner of plastic material deformed from a generally cylindrical shape having a predetermined external diameter to a reduced diameter enabling reception of the second liner in the first liner;
- providing ribs on one of the inner surface of the first liner and the outer surface of the second liner;
- introducing said first deformed liner into the pipe;
- introducing said second deformed liner into the first liner after introducing said first liner within the pipe such that said ribs lie between said first and second liners in the pipe;
- and
- restoring the deformed liners while in the pipe to their respective cylindrical shapes to enable the first liner to bear against the internal surface of the pipe and the first and second liners to contact one another by way of said ribs, thereby spacing said liners relative to each other in the pipe.
A lining system for a pipe comprising a first tubular liner of plastic material deformed from a generally cylindrical shape having an external diameter which corresponds generally to the internal diameter of the pipe, to a reduced diameter enabling reception of the deformed liner in the pipe, a second tubular liner of plastic material deformed from a generally cylindrical shape having a predetermined exterior diameter to a reduced diameter, said second liner disposed in said first liner, said deformed first and second liners being reformable into said cylindrical shapes, respectively;
- and
- a plurality of ribs carried by one of said first and second liners and extending radially between the inner surface of the first liner and the outer surface of said second liner for spacing said liners relative to each other when said liners are reformed into their respective cylindrical shapes in the pipe.
A lining system for a pipe comprising a first tubular liner of plastic material having a generally U-shaped cross-section enabling reception of the U-shaped liner in the pipe, a second tubular liner of plastic material having a generally U-shaped cross-section and receive in the first liner, said first and second liners being reformable from their respective generally U-shaped cross-sections into generally cylindrical shapes, respectively;
- and
- a plurality of ribs carried by one of said first and second generally U-shaped liners and projecting between the inner surface of the first liner and the outer surface of said second liner for spacing said liners relative to each other when said liners are reformed into their respective cylindrical shapes in the pipe.
Dependencies are inferred from the claim text.