Liquid viscous damper

A liquid viscous damper in which an output-side driven plate and an input-side drive plate housing the foregoing driven plate by covering both sides and outer peripheral side of the foregoing driven plate are installed, a damper mechanism for developing a torisonal torque is installed in between the both plates, a liquid chamber is formed between the drive and driven plates and filled with liquid, the liquid chamber is partitioned into circumferential front and rear divided-chambers, and the divided chambers are connected by chokes;

• a main choke, characterized by projections formed on the outer periphery of the driven plate and protruding into the liquid chamber, a slider is fitted onto the drive plate in such a manner as slidable in a rotational direction, a main choke is formed between the slider and the projection, stoppers above to mate with the projection at circumferential both ends of the slider are formed with spaces left between them in the rotational direction, and a sub-choke connecting the divided chambers is formed separately from the main choke.