Abstract: A motor vehicle coolant heat exchanger having a modifiable covering system includes a support, a winding shaft mounted rotatably around a winding axis, a rotational drive, a roller-blind web, at least one pulling means winding body connected to the winding shaft to rotate together, and a pulling means. The roller-blind web is windable onto and unwindable from the winding shaft along a winding trajectory, which comprises a pulling crosspiece at its longitudinal end region located remotely from the winding shaft. The pulling means is unwindable from and windable onto the pulling means winding body parallel to the winding trajectory, which is connected at its longitudinal end remote from the pulling means winding body to the pulling crosspiece. The pulling means is guided around a deflection roller in such a way that its longitudinal end connected to the pulling crosspiece moves away from the winding shaft while it is being wound on.

Abstract: A wheel suspension is provided for a non-motorized vehicle, in particular a pram or a bicycle trailer designed to transport children, which features a chassis (1) and at least two wheels (8), which are each mounted on a wheel swing arm (11, 15). For each wheel swing arm (11, 15) at least one elastic element (21) is provided, whereby the wheel swing arm (11, 15) supports itself via the chassis (1). In order to provide a wheel suspension of this kind which is based on a simple construction and enables an optimum level of suspension and shock-absorption for the non-motorized vehicle: (a.) the elastic element (21) is made of at least one dimensionally stable flexible polyurethane foam material, and/or (b.) both wheel swing arms (11, 15) protrude laterally over the chassis (1) and can be pivoted past a lateral frame section (3, 4) of the chassis (1).