Patent ID: 7014156
Filing Date: 2006-03-21
Classification: A63B,Y10S,Y10T

Abstract:
1. A cam device of the type that engage cracks having two facing walls for use during climbing, said cam device comprising a shaft; a plurality of cams disposed on the shaft to rotate about the shaft, each of the cams having an edge to contact the crack walls that is disposed on one side portion of said cam and a convex surface disposed on another side portion of said cam opposite said edge of said cam in contact with the walls; a component for applying a load on two adjacent ones of said plurality of cams, said component is wrapped on said convex surface to exert a load on the cam on said another side portion of the cam opposite said edge of the cam that is in contact with the walls; a sling having eye terminal on both ends where said one eye terminal is connected to said component for applying the load on the cams; said component having ends and each of said end is fastened to a respective one of said adjacent cams such that when the component is pulled, the adjacent cams are rotated simultaneously about said shaft; and a spring operatively exerting pressure on the component and rotating the cams to a position in which the cams are fully extended.