Patent ID: 7597389

Claim:
A damper for an automobile seat comprising: a fixing member adapted to be fixed to a chassis on which an automobile seat is rotatably installed; a rotator which is rotatable relative to said fixing member and forms a gap with said fixing member; a silicone-based unvulcanized rubber disposed in the gap; and a one-way clutch which, in the rotation of the automobile seat in one direction, is adapted to transmit the rotation in the one direction to said rotator, and which, in the rotation of the automobile seat in another direction, is adapted to inhibit the transmission of the rotation in the other direction to said rotator, said fixing member being constituted by two members, one of said members having a central shaft portion and a plurality of hollow cylindrical portions disposed concentrically on one axial end portion side of the central shaft portion, another one of said members having a plurality of other hollow cylindrical portions disposed concentrically on another axial end portion side of the central shaft portion, the innermost hollow cylindrical portion of said plurality of other hollow cylindrical portions is fittingly secured with respect to the other axial end portion of the central shaft portion, said rotator including two sets of pluralities of hollow cylindrical portions disposed concentrically with the central shaft portion and arranged in an axial direction and a closure portion disposed between said two sets of pluralities of hollow cylindrical portions and formed integrally with respective ones of said two sets of pluralities of hollow cylindrical portions, said rotator being supported rotably by the central shaft portion between said two members of said fixing member, and both pluralities of hollow cylindrical portions of said fixing member and said two sets of pluralities of hollow cylindrical portions being overlappingly fitted to each other in the radial direction with the gap in which said silicone-based unvulcanized rubber is disposed.