Adjustable bumper including protection against under-ride

This invention provides an adjustable, protective bumper, especially designed for a vehicle, or the like, having an elevated body which is susceptible to being under-ridden during a rear-end collision by another vehicle. The adjustable protector bumper protects against under-ride and further has provision for absorbing or dissipating the energies of the impact so as to minimize damage to property and injury to persons in the event of such collision. The bumper comprises a hanging support for connecting the bumper to the rear portion of a vehicle body or the like; a rear structure vertically adjustably connected to the hanging support and extending downwardly therefrom; support means, for example a platform, for energy dissipating, impact protection means, connected to the lower rigid structure; and a plurality of adjustable reinforcing struts forming a triangulated reinforcement from the lower rigid structure designed and adapted to be connected at one portion of the strut to a vehicle body and from two other portions of the triangulated strut to the lower rigid structure; and adjustment means for varying the length of these struts.