Patent ID: 6962459
Filing Date: 2005-11-08
Classification: E01F

Abstract:
1. A vehicle crash attenuator comprising: at least one guiderail; a first structure for bearing vehicle impacts movably mounted on the at least one guiderail; at least one second structure movably mounted on the at least one guiderail behind the first structure and capable of stacking with the first structure upon a vehicle impacting the first structure and causing the first structure to translate into the at least one second structure; a cylinder and a cable running between the cylinder; and the first structure, the cylinder and cable applying to the first structure a varying force to resist the first structure translating away from the impacting vehicle to thereby decelerate the vehicle at or below a predetermined rate of deceleration; the cylinder including a piston rod that is moved within the cylinder by the cable, in connection with the varying force being applied to the structure.