G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/44 (2006.01) G02B 6/46 (2006.01)
Patent
CA 2305395
Method and apparatus for installing cables in tubes, in which the cable is installed by the combination of a pushing force and the drag force of a fluid under pressure which is passed through the tube, wherein, during the installation, as fluid, a first medium with first hydrodynamic properties is passed into the tube and at certain moments a second medium with second hydrodynamic properties. It has been found, surprisingly, that by the use of media having different hydrodynamic properties, such as, for instance, a gas and a liquid, the installation length of the cable can be increased.
L'invention porte sur un procédé et un appareil d'installation de câbles dans des tubes par combinaison des forces de poussée et de traction exercées par un fluide sous pression introduit dans le tube. On utilise comme fluide d'abord un premier milieu présentant de premières caractéristiques hydrodynamiques, puis, à certains moments, un deuxième milieu présentant de secondes caractéristiques hydrodynamiques. On a en effet remarqué avec surprise qu'en utilisant des milieux aux caractéristiques hydrodynamiques différentes, tels que par exemple un gaz et un liquide, la longueur d'installation du câble pouvait s'accroître.
Borden Ladner Gervais Llp
Koninklijke Kpn N.v.
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