| 主权项 |
1. An apparatus for sealing an open end of a pipe comprising:
a front plate for positioning against the open end of the pipe; a back plate adapted for insertion within the pipe, the back plate including a first face, a second face and a perimeter, wherein, when in use, the first face faces the open end of the pipe and the second face faces the lumen of the pipe; a sealing member for forming a circumferential seal between the back plate and the inner surface of the pipe; a first gripping means for frictionally engaging the inner surface of the pipe; a second gripping means for frictionally engaging the outer surface of the pipe; and, one or more connecting means for connecting together the front plate, the back plate and the first and second gripping means and for urging the back plate towards the front plate; wherein the first and second engagement means prevent relative axial movement between the apparatus and the pipe when the apparatus is in use; and wherein the back plate includes two or more ports for providing a fluid connection into the pipe through the back plate, each of said ports having a first opening on the first face of the back plate and a second opening on the perimeter of the back plate, wherein, when said apparatus is in use, at least one of said ports is adapted to fill the pipe with a pressurizing fluid and another of said ports is adapted to vent the pipe. |
