France Telecom

Joel Le Cam

Jean-Luc Campion

Alain Pecot

Pierre Mignon

A device for installing or removing a cable in cable conduits within which a current of water is also conveyed is disclosed. The device includes an electric motor to provide for progression of the cable, a heat engine controlling either a hydraulic circuit or an air compression circuit, and sensors to measure the progression of the cable. The sensors are linked to a CPU to drive the electric motor and the heat engine. The device is compact and can be positioned on a single trailer that is towable by a light vehicle, making the device easy to move on a job site.

Method for installing and/or removing a cable in cable passage conduits and implementing device

A method for installing and/or removing a cable ( ) in conduits ( ) for the passage of cables and to an associated implementing device. According to this method, a current of water is conveyed inside the conduits ( ), the cable ( ) to be installed has a conduit fill rate that can attain 90%, and the conduits ( ) form a winding course on a length greater than 2000 m. This method is chiefly characterized in that the cable ( ) is subjected to a thrust force that drives its speed of progression (v), and in that said thrust force and the pressure of the water flowing in the conduits are regulated so as to maintain a constant water flow rate inside the conduits ( ).

In a device for placing a structural element in a cable installation conduit in order to sub-divide it, the structural element has a width close to the size of the internal perimeter of the conduit and comprises a plate surmounted by ribs. The device comprises a hot air inlet designed to soften the plate of the structural element; an external cylinder whose diameter is identical to that of the conduit, the cylinder comprising a shaping cone at one end in order to enable the softened structural element in order to gradually take a cylindrical shape; and an internal core fixedly held at a position located in the shaping cone of the external cylinder and positioned inside the softened structural element in order to give it a constant internal diameter when it is being shaped.

Growing community of inventors

Lannion, France

Joel Le Cam