Cable conduit with ridged inner wall

H - Electricity – 02 – G

Patent

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Details

H02G 3/04 (2006.01) B65H 57/12 (2006.01) H02G 1/08 (2006.01) H02G 3/22 (2006.01) H02G 9/06 (2006.01)

Patent

CA 2098219

An electrical conduit is substantially circular and is internally formed with zig-zag ridges. The ridges are angularly equispaced and have portions of constant pitch a joined at corners, and the ridges contact a cable in the conduit at regions K each defined by the formula: Ar = 0.16b2zL K, where A = the surface of area R, equal to between 4,5mm2 and 32mm2, r = the radius of the conduit or D/2, b = the width of the contact region K, z = the number of ridges 1, and L K = axial length of each ridge straight portion. The straight-portion pitch g in radians is equal to: g = r'al L K and is between 0.0o1rad and 1.2rad, radius r being equal to between 12mm and 100mm and L K is between 500mm and 10,000mm, depending on the diameter of the cable which can range from 5mm to 45mm.

La présente invention vise un conduit électrique de forme essentiellement circulaire dont l'intérieur présente des rainures en zigzag. Ces rainures sont façonnées à angle, à égale distance les unes des autres, et elles sont constituées de segments de même espacement réunis à leurs points de rencontre. Ces rainures sont en contact avec un câble, à l'intérieur du conduit, dans les zones K définies séparément par la formule Ar = 0.16b2zL K, où A = la surface de la région R dont la valeur se situe entre 4,5 et 32 mm2, r = au rayon du conduit ou à D/2, b = la largeur de la zone de contact K, z = le nombre de rainures l, et L K =la longueur axiale de chaque segment droit d'une rainure. L'espacement des segments droits exprimé en radians par la valeur g est égal à g =r'al L K et se situe entre 0.001 et 1.2 radian, le rayon r correspondant à une valeur se situant entre 12 et 100 mm, et la valeur L K se situant entre 500 et 10 000 mm, selon le diamètre du câble, qui être de 5 à 45 mm.

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