Patent ID: 7455337

Claim:
An underrun protection arrangement for a vehicle comprising: a frame, an impact element arranged in a position corresponding to an anticipated stress from a force experienced in the event of a possible collision with another vehicle; the impact element comprising an upper transverse beam, wherein the impact element includes a lower transverse beam which is fixed to the upper transverse beam by a bolt forming a connection member between the upper and lower transverse beams, the bolt having a shank and a securement portion at an end thereof, the securement portion comprising a) the head of the bolt or b) the head of the bolt and a washer; the upper transverse beam has at least one first through-opening with a periphery the shape of which firstly defines areas for the passage of the securement portion of the bolt through the first through-opening when the bolt is placed in a position in which the shank of the bolt forms an angle with a normal to the section of the beam in which the first through-opening is formed, and secondly a bearing surface in which the periphery of the first through-opening is arranged at a distance from a center point of the first through-opening which is less than the radial extent of the securement portion; the shank of the bolt extends through the first through-opening in the upper transverse beam and a second through-opening arranged in the lower transverse beam; the securement portion bears against the bearing surface of the upper transverse beam; and a nut is fitted on the shank of the bolt adjacent to the second through-opening arranged in the lower transverse beam for clamping the lower transverse beam to the upper transverse beam.