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Machine translation
1. (WO1983002575) PROTECTIVE BEAM, AND METHOD OF MANUFACTURING THE SAME
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

PATENT CLAIMS
1. A bar in particular one intended as a safety bar (1) for vehicles in collisions and similar situations, formed with a thin-walled closed and trapezoidal cross-section, comprising two parallel flanges (4, 5) and two webs (6) at an angle to the latter
c h a r a c t e r i s e d in that at least one of the flanges (4, 5) is designed with projecting corners (7) which extend along the bar and which project outward from the plane through the flanges (4, 5) and away from the bar at the edges of the flanges (4, 5).
2. A safety bar (l) in accordance with Claim 1
c h a r a c t e r i s e d in that only the narrower flange (4) is provided with projecting corners (7).
3. A safety bar (1) in accordance with Claim 1 or 2 c h a r a c t e r i s e d in that the webs (6) are slightly bent in the direction towards the centre of the safety bar (1).

4. A safety bar (1) in accordance with Claim 1 or 2 c h a r a c t e r i s e d in that the webs (6) are provided with stiffening steps (13).
5. A safety bar in accordance with Claims 1 - 4
c h a r a c t e r i s e d in that the bar section is produced in one or several pieces and provided with at least one weld (8) arranged at the centre of the narrow flange (4).
6. A process for the production of safety bars in accordance with Claims 1 - 5
c h a r a c t e r i s e d in that the bar section is roller bent in a cold state in one or several stages, welded together with one or several welds along its length and then straightened in a cold state.