Patent ID: 7966940
Filing Date: 2011-06-28
Classification: A62B,A63G,B61B,B61H

Abstract:
1. A method to minimize loads of arrest in a trolley, the method comprising: providing a trolley having a frame and traveling along a cable suspended from supports proximate first and second ends of the cable; initiating, proximate the first end of the cable, relative motion of the trolley with respect to the cable in response to a gravitational force; applying, automatically, by the frame, acting on a brake, a braking force between the trolley and the cable to control the speed of the trolley along the cable; approaching, by the trolley, the second end of the cable; relieving, proximate the second end of the cable, the braking force during a continuation of the motion of the trolley with respect to the cable; the relieving, further comprising engaging, by the frame, a capture element, reducing automatically the braking force applied by the frame, by pivoting about an axis orthogonal to a direction of the cable, thereby lifting a load carried by the trolley, in response to movement of the trolley; and transferring a first portion of kinetic energy corresponding to the trolley into a deflecting element deflecting along the direction of the cable.