Patent ID: 6070858
Filing Date: 2000-06-06
Classification: B66D

Abstract:
A device for gripping and tensioning a line in tackles or pulley blocks, comprising:interconnected upper and lower coniform discs each having surface contours producing sufficient retention force with only a single loop of the line providing means of traction, the surface contours comprising inwardly directed radial waves having a positive line-engaging profile with a flank angle between 35.degree.-45.degree. set against a pull direction of the line and a flank angle between 35.degree.-45.degree. on an output side, with the flank angle of the pull direction being steeper than the flank angle of the output side, the radial waves also having a trough radius equivalent to or smaller than a radius of the line, and the contouring of the upper coniform disc being modeled in an opposite mirror image direction to the contouring of the lower coniform disc.