Patent ID: 8382078

Claim:
A bump stopper for a rear suspension having multiple constricted parts in a circumferential surface surrounding an interior space and elastically deforming so as to achieve a buffering action at a time of colliding with a partner member at an annular distal end portion, said distal end portion colliding with the partner member in a state that a bump stopper central axis is inclined relative to a collision surface of the partner member, wherein said annular distal end portion includes an outside diameter surface, an inner diameter surface, and a distal end surface connecting the outside diameter surface and the inner diameter surface to each other, the outside diameter surface and the inner diameter surface continuously extend radially outwards from one of the constricted parts, which is adjacent to the distal end portion, to the distal end surface so that a distal end of the inner diameter surface is brought into contact with the partner member, a diameter at a collision start point positioned at the distal end of the inner diameter surface is equal to or larger than an outside diameter of the one constricted part adjacent to the distal end portion, and the interior space includes: a cylindrical bore; a conical surface divergently extending from an end of the cylindrical bore; a cylindrical surface extending from an end of the conical surface opposite the cylindrical bore; and the inner diameter surface conically extending outward from an end of the cylindrical surface opposite the conical surface.