System and method for slipliner renovation of semi-elliptical conduits
US5458155A · kind A · utility
Inventor
Key dates
| Filing date | Jul 5, 1994 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Jul 5, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F2003/065
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.