Device for filling a pipe with fluids, for emptying from a pipe and for drying a pipe

Abstract From the Canadian patent

A device for emptying a fluid from a pipe and for simultaneously filling the pipe with another fluid while preventing the fluids from mixing. The device comprises: a support member having a head end for insertion in the pipe for emptying a fluid from the pipe, and a sealing means attached to the head end of the support so that when the device is inserted in the pipe the sealing means presses against the inner walls of the pipe thereby preventing the fluid being emptied from the pipe from mixing with the fluid filling the pipe. A braking means is attached to said support member for slowing the movement of the fluid filling the pipe thereby causing the pressure of the filling fluid to be …