Patent ID: 8286764

Claim:
A rotational damper comprising a stator ( 1 , 2 ) and a rotor that is rotatably supported in the stator, the rotor having a first friction element ( 31 ), wherein the volume between the stator ( 1 A, 2 A) and the rotor is filled with a viscous fluid, characterized in that the rotor has a second friction element ( 32 ) that is supported coaxially in relation to the first friction element ( 31 ) and rotationally coupled thereto, and that can be axially displaced relative to the first friction element; wherein said damper further comprises an adjusting element ( 4 ) that can be operated from outside, said adjusting element ( 4 ) being connected to the first or to the second friction element ( 31 , 32 ) for their relative axial displacement; and wherein the adjusting element is an adjusting nut ( 4 D), whose internal thread engages into an external thread of the first friction element ( 31 D) and acts upon the second friction element ( 32 D) in an axial direction.