Nkf Kabel B.v.

Cornelis Van &prime;T Hul

Willem Griffioen

Pieter Lock

Willem Greven

Arie Van Wingerden

Frans Robbert Bakker

Guide tubes are arranged in a loose bundle and are fed into an existing tubular conduit or protective duct by a powered tractor and are pulled through the duct by the volumetric flow of compressed air which is introduced into the inlet end of the duct. The guide tubes are pressurized and closed at their leading end and trailing end. The existing duct is open at both ends. When the filling degree of the guide tube bundle (sum of guide tube cross-sectional areas compared to that of channelization duct) is provided in the range of from about 30% to about 60%, blowing/pushing installation of the guide tube bundle is substantially trouble free, and the bundle of guide tubes can be installed in a flexible and efficient manner over relatively greater distances.

Growing community of inventors

Den Hoorn, Netherlands

Cornelis Van ′T Hul

Growing community of inventors

Den Hoorn, Netherlands

Cornelis Van &prime;T Hul

Cornelis Van ′T Hul