Abstract: A damping valve device for a vibration damper has a restriction in connection with a valve element movable from an open position into a restriction position depending on the flow velocity of a damping medium inside the restriction. The valve element, as a variable-diameter annular element, moves in closing direction with increasing flow velocity of the damping medium within an annular groove of a valve support. The annular groove is constructed as a pressure space having at least one inflow orifice and at least one outflow orifice. The valve element is positioned at a radial distance from an annular groove base by centering elements.

Abstract: The invention concerns a system for monitoring the movement of goods inwa and/or outwards with the aid of characteristic markings, such as a bar code which is scanned by a reading pen. Each reading pen is connected by a terminal which has a display and keys for giving special signals by flexible connecting wires. Each terminal is connected via an infrared beam with a so-called converter and this is connected via connecting wires with a control center and a processor as well as a memory. The reading pen contains no electronic components, as small proportion of these are contained in the terminal while the by far greater proportion is contained in the control center with the related processor and memory.The signals from the reading pen transmitted to the control center and passed on to the processor and memory are also transmitted back to the terminal concerned where they appear in a display so that the person operating the lightweight reading pen can check them.