System for impregnating a liner for use in underground conduit repair
US8354139B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jan 5, 2011 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Apr 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for impregnating a liner with a curable substance enables the liner to be used to repair or refurbish an underground conduit. The system includes a vacuum pump having a vacuum line communicably connected thereto. The vacuum line has a vacuum inlet formed therein. The vacuum line supports the liner such that the liner covers and encloses the inlet. A supply of a curable substance has an applicator line connected thereto. The applicator line is proximate the vacuum line and has a discharge port located proximate the liner supported on the vacuum line. An applicator pump moves the curable substance through the applicator line and discharge port onto the liner while the vacuum pump draws a vacuum on the liner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.