Damping valve device having a progressive damping-force characteristic curve

A damping valve device for a vibration damper, comprising:

• a throttle point;
• a valve body constructed as a ring element with variable diameter that executes a radial closing movement in direction of a flow guide surface in which a defined minimum passage cross section is maintained;
• a first damping valve that moves into a through-flow operating position in a first operating range with increasing flow velocity of a damping medium, wherein a second operating range with a progressive damping force characteristic is influenced by the throttle point in connection with the valve body, which can be transferred into a throttle position;
• and
• a limit ring arranged on an outer circumferential surface of the annular valve body,
• wherein the valve body moves in a closing direction with an increasing flow velocity of the damping medium, and
• wherein the valve body is arranged in series hydraulically with the first damping valve.