Liquid injection apparatus for use in a method of lining the internal surface of a pipe
US5632818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Nov 20, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/164
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is provided a liquid injection apparatus for use in a method of lining the internal surface of a pipe. The apparatus comprises a push car having a frame structure, a liquid tank for storing a necessary amount of liquid to be injected into the pipe, a liquid pump for pumping the necessary amount of liquid so as to inject the liquid into the pipe, and a liquid injection controlling device for controlling the pressure of the liquid being supplied through the liquid pump, for stopping the liquid injection after a predetermined amount of liquid has been injected into the pipe, and for stopping the liquid injection if the liquid pressure in the pipe changes beyond a predetermined range. The liquid tank, the liquid pump and the liquid injection controlling device are installed together in the push car so as to be easily movable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.