Patent ID: 7232275

Claim:
A bollard comprising: a series of at least two nested, inverted, substantially U-shaped forms of decreasing height set around a common vertical axis, the U-shaped forms being made of metal pipes, and wherein the U-shaped forms have physical characteristics such that on impact by a moving vehicle, including an automobile or a truck, the U-shaped forms will initiate a “crumple zone” type reaction, wherein each substantially U-shaped form has an upper transverse portion and two parallel, vertical legs extending from the upper transverse portion; and means for joining the substantially U-shaped forms together as a unit, wherein the means for joining comprises at least one center joining plate located below the upper transverse portions of the forms, the forms being fastened to the at least one center joining plate, wherein the center joining plate comprises a disc having notches at the perimeter thereof complimentary in shape to the cross-section of the legs for engaging the substantially U-shaped forms.