Patent ID: 7347308

Claim:
A damper comprising: a cylinder, viscous fluid filled in the cylinder, a piston disposed in the cylinder for dividing the cylinder into two portions in an axial direction and having an orifice communicating in the axial direction, said piston including a first member and a second member movable in the axial direction relative to the first member, said first and second members being loosely fitted to have a gap therebetween for passing the viscous fluid therethrough so that said gap decreases when the first member moves toward the second member, a piston rod extending into the cylinder and fixed to the first member, a first urging device disposed between the first and second members for elastically urging the second member in a direction that the second member is moved away from the first member so that a braking force is generated through flow resistance of the viscous fluid passing through the orifice and the gap when the piston moves together with the piston rod inside the cylinder in one direction, a retainer immovably disposed at one side of the cylinder and having an outer wall contacting the cylinder and two end walls extending perpendicular to the outer wall to define an inner space of the retainer by the outer wall and two end walls, an accumulator disposed in the inner space of the retainer defined by the outer wall and the two end walls, said accumulator being formed of a foam plastic with elasticity for absorbing a pressure applied to the viscous fluid by compressive deformation thereof when the piston rod is moved into the cylinder, and a cap for covering ends of the cylinder and the retainer, said cap partly entering inside the outer wall of the retainer so that said piston rod extends from an inside of the cylinder to an outside thereof through the accumulator, retainer and cap.