Abstract: A system for averting the threat posed by a vehicle rampage. The system includes at least one device for bringing the vehicle to a halt by external intervention. The system has a sensor arrangement which is connected to the device.

Abstract: A mobile, stationary and/or temporary barrier (9) having mobile obstacles for the protection of crowds. The temporary barrier (9) includes a plurality of mobile obstacles (1). The mobile obstacles (1) are connected to elements (5).

Abstract: A system for averting the threat posed by a vehicle rampage. The system includes at least one device for bringing the vehicle to a halt by external intervention. The system has a sensor arrangement which is connected to the device.

Abstract: For producing a device for controlling the flow of a medium, having a housing and a flap supported pivotably in it between a closing position and an open position, which flap in its closing position rests with its peripheral region on stop faces of the housing that are present on both sides of the longitudinal axis, to create tightness in the closing position in later operation, the flap is subjected to a force which is selected, taking into account the material comprising the stop faces and the flap, such that the flap with its peripheral region rests on at least one stop face at least substantially with linear contact. The force can be selected such that the housing, in the region of at least one stop face, and/or the flap, in its peripheral region, is permanently deformed. The housing and the flap are of metal.