Shuttle for use in insertion of a draw line into a conduit

H - Electricity – 02 – G

Patent

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Details

H02G 1/08 (2006.01) F16L 55/38 (2006.01)

Patent

CA 2253479

An air flow activated shuttle (1) for pulling a draw line (6) through a length of conduit (2) having entry and exit end, said shuttle comprising a shaft (3) having a leading end (4) and a trailing end (5); means (7) on said trailing end which receives and retains a leading end of said draw line; at least one air flow mitigation element (9, 10) attached to said shaft which at least partially interrupts an air flow introduced into the entry end of said conduit from an air source to said shuttle from the trailing end thereby urging said shuttle along said pipe urging said draw line therealong and through said exit.

L'invention porte sur une navette (1) entraînée par un flux d'air servant à tirer un câble de traction (6) sur une longueur d'une conduite (2) comportant une extrémité d'entrée et de sortie. Ladite navette comporte: un axe (3) présentant une extrémité avant (4) et une extrémité arrière (5); des moyens (7) placés à ladite extrémité arrière et recevant et bloquant l'extrémité avant dudit câble de traction; et au moins un élément d'atténuation (9, 10) du flux d'air, solidaire de l'axe et qui interrompt au moins partiellement le flux d'air injecté dans l'entrée de la conduite depuis une source d'air, jusqu'à ladite navette par son extrémité arrière et la poussant le long du tube en entraînant ledit câble de traction dans la conduite jusqu'à la sortie.

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