Device, method and system for installing cables in a cable duct

摘要

The invention provides a device (2) to be included in a duct (3) for exerting additional pushing forces on a cable which is installed by means of a pressurized fluid (e.g. air) passed through the duct (3). The device comprises rotary elements (22) provided with vanes (27) and accommodated in a housing (20). An inner wall (33) of the housing and the vanes of each rotary element are shaped and arranged for a pump-like working of the device during installation of a cable. In preferred embodiments the vanes (27) of the rotary elements (25) are in direct propelling engagement with the cable to be installed. The device (2) is simple and inexpensive. A system for installing cables preferably comprises a plurality of devices (2) of the present invention arranged either permanently or temporarily in the duct (3). <IMAGE>