Patent ID: 7354031
Filing Date: 2008-04-08
Classification: F16F

Abstract:
1. A cylindrical vibration damping apparatus comprising: an inner shaft member; an outer cylinder member disposed spaced apart to an outside of the inner shaft member; a rubber elastic body disposed between and elastically connecting the inner shaft member and the outer cylinder member; and a pair of rubber stop plates disposed at two axial ends of the inner shaft member, each rubber stop plate having a mount hole that fits about the outside of the inner shaft member to be assembled with a corresponding axial end of the inner shaft member, wherein three or more pairs of mating projections and mating recesses are provided to an interface between an inner circumferential surface of the mount hole of each of the rubber stop plates and an outer circumferential surface of the corresponding axial end of the inner shaft member at different positions in a circumferential direction so that the pair of rubber stop plates are installed onto the axial ends of the inner shaft member, while correctly identifying a front and back and a circumferential position about the inner shaft members, wherein intervals between each of the three or more pairs of mating projections and mating recesses are different in the circumferential direction.