Abstract: A forward longitudinal bearer of a motor vehicle constructed as closed, hollow bearer with an impact-near energy-absorbing part which is so composed section-wise that three series-connected zones result, of which the center zone is located within the area of aggregate support points and exceeds the two adjoining zones as regards their rigidity by the use of materials of increased strength and/or greater wall thickness.

Abstract: A lateral protection for motor vehicles in which at least one reinforcement extending essentially in the vehicle longitudinal direction is arranged on the inside of each door, whereby in case of an external force influence or action which occurs in the vehicle longitudinal direction the reinforcements, preferably constructed as hollow bearers, are supported in the vehicle longitudinal direction with one end each either directly or indirectly at a fixed structural part such as, for example, at an upright column or at a wheel casing or at a further reinforcement belonging to an adjacent door.

Abstract: A door for vehicles which includes an outer door panel and an inner door panel and is equipped with a lowerable window; the inner door panel thereby extends through the plane formed by the lowered window in such a manner that above the area where it passes through this plane, the inner door panel extends on the side of this plane facing the interior space of the vehicle and below this area, it extends on the side of this plane facing the outer door panel; within the area where it passes through the plane of the lowered window, the inner door panel is provided with an aperture for the passage of the lowerable windowpane.