Device and method for measurement of the thickness of sprayed-on internal pipe liners
US10486180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2017 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Mar 13, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L2101/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and device for measuring the thickness of a liner applied onto the inner wall of a pipe, the device comprising a sprayer assembly adapted to deposit a polymer resin onto the inner wall of a pipe to create a liner upon curing, the sprayer assembly being moved through the pipe. The sprayer assembly has a leading sensor assembly that measures the inner diameter of the pipe and trailing sensor assembly that measures the inner diameter of the liner. The trailing sensor assembly has a housing with windows through which sensor devices take readings, and a transparent film is disposed across the windows to protect the sensors from occluding contamination. The transparent film is advanced as the exposed portion of the film becomes excessively contaminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.