Patent ID: 6270288
Filing Date: 2001-08-07
Classification: F16L

Abstract:
A device inserted in a conduit for advancing a cable through the conduit from an upstream position to a downstream position, the device comprising:an interior conduit section having an upstream end connected to said conduit and an open end opposite the upstream end, the cable passing from the conduit connected at the upstream end, through the interior conduit section and out the open end;an exterior conduit section having a first interior diameter larger than a first outer diameter of the interior conduit section, the exterior conduit section surrounding the interior conduit section forming a cylindrical space therebetween, the exterior conduit section having a downstream end connected to said conduit at a point removed in the direction of travel of the cable from the open end of said interior conduit section and having a closed end opposite the downstream end, the cable passing from the open end of the interior conduit section, through the downstream end of the exterior conduit section and into the conduit connected at the downstream end of the exterior conduit section;a flange affixed to, and extending between, the closed end of the exterior conduit section and the interior conduit section, the interior conduit section extending beyond the flange in the direction opposite the direction of advancement of the cable, the flange closing the cylindrical space at the closed end of the exterior conduit section; anda fluid medium connector for introducing a fluid medium under pressure into the cylindrical space, the fluid, medium flowing in the direction of advancement of the cable, the fluid medium flowing through the cylindrical space, past the open end, through the downstream end and into the conduit connected to the downstream end, the fluid medium surrounding the cable, the flow of the fluid medium exerting a drag force on the cable, the drag force tending to pull the cable through the conduit.