Patent ID: 8672105

Claim:
A damping control device filled with a magnetorheological (MR) fluid, comprising: a lower core including an outer ring, an upper plate and a lower plate disposed inside the outer ring in parallel to each other, a plurality of connections disposed with circumferential gaps connecting the lower plate to the outer ring, and a coil provided between the upper plate and the lower plate; an orifice formed of a nonmagnetic material and including an outer ring, an inner ring disposed inside the outer ring, and a plurality of connections disposed in a lower end of the orifice between the outer ring and the inner ring with circumferential gaps and safely seated on the connections of the lower core when the orifice is combined inside the outer ring of the lower core; an upper core including an outer ring brought into close contact with an upper end of the outer ring of the lower core, a pressure-applying circular-shaped plate disposed inside the outer ring to face the upper plate and to be apart from the upper plate, and plate springs connecting the outer ring and the pressure-applying plate; and a membrane made of an elastic material and combined with the lower core to shield a lower end of the lower core, wherein, the lower core and the upper core are magnetized when a current is applied to the coil, and a predetermined amount of the MR fluid is filled therein, such that the MR fluid flows between the pressure-applying plate and the upper plate according to an elastic compression of the membrane.