Abstract: A torsional vibration damper with a friction device. The friction device is formed on at least one friction surface on two contra-rotationally and oppositely disposed disc parts that are in frictional contact with one another. In order to propose how to determine the initial stressing effect of the frictional action independently of external support of the disc parts, the frictional surfaces are pressurized against one another by means of at least one spring element.

Abstract: An arc spring damper, including: a plurality of arc springs, a driving flange having a plurality of driving spring segment, a driven flange having a plurality of driven spring segments, and a ring plate including a plurality of radially extending retention segments. Each arc spring in the plurality of arc springs includes a passageway with first and second openings at first and second longitudinal ends, respectively, for the arc spring. Each driving spring segment includes a circumferentially extending driving portion and each driven spring segment includes a circumferentially extending driven portion. For each spring, a respective driving portion passes through the first opening into the passageway and a respective driven portion passes through the second opening into the passageway. Each radially extending segment from the plurality of radially extending segments is connected to and rotatable with a spring from the plurality of arc springs and radially restrains the arc spring.

Abstract: A torsional vibration damper with a friction device. The friction device is formed on at least one friction surface on two contra-rotationally and oppositely disposed disc parts that are in frictional contact with one another. In order to propose how to determine the initial stressing effect of the frictional action independently of external support of the disc parts, the frictional surfaces are pressurized against one another by means of at least one spring element.

Abstract: An arc spring damper, including: a plurality of arc springs, a driving flange having a plurality of driving spring segment, a driven flange having a plurality of driven spring segments, and a ring plate including a plurality of radially extending retention segments. Each arc spring in the plurality of arc springs includes a passageway with first and second openings at first and second longitudinal ends, respectively, for the arc spring. Each driving spring segment includes a circumferentially extending driving portion and each driven spring segment includes a circumferentially extending driven portion. For each spring, a respective driving portion passes through the first opening into the passageway and a respective driven portion passes through the second opening into the passageway. Each radially extending segment from the plurality of radially extending segments is connected to and rotatable with a spring from the plurality of arc springs and radially restrains the arc spring.