Patent ID: 6810818
Filing Date: 2004-11-02
Classification: A63G,B61B,Y10T

Abstract:
A double pulley device for use for zip-line traversing on a rope or cable comprising:a pair of sheaves arranged in line inside a reverse U-shaped metal support flange-plate, each sheave being mounted rotating free on a fixed spindle of the flange-plate, and means for fitting the flange-plate to an attachment snap-hook, wherein the means for fitting the flange-plate comprise at least one orifice for passage of the snap-hook situated between the two spindles of the sheaves so that a fixing point of the snap-hook is positioned above a point of contact of the sheaves with the cable, one of a plurality of wings of the flange-plate being arranged to enable a mobile finger of the snap-hook to be opened when the double pulley device is fitted onto the cable and wherein one of the wings of the flange-plate situated on the same side as the mobile finger of the snap-hook is shorter than the other wing.