Method for installing a tube or a bundle of tubes in an existing tubular duct
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United States of America Patent
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Mar 23, 1999
Grant Date -
N/A
app pub date -
Dec 18, 1996
filing date -
Dec 21, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method for installing a tube or a bundle of tubes in an existing tubular conduit. The tube or tubes are passed into the existing tube by means of a fluid under pressure which is introduced into the existing tube at the inlet end. The tube or tubes can be open or closed at their forward end and are connected to a guide device and/or a pulling device. The existing tube can be open or closed at the end. With the method according to the invention, tubes can installed in an existing tube in a flexible and efficient manner, which tubes can be used for various purposes, for instance as an envelope of telecommunication cables.
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