Patent ID: 8794608

Claim:
A vibration isolation apparatus comprising: an internal cylinder member attached to a vibration source or a vehicle body; a bracket member formed of a resin material and comprising an inner hole in which the internal cylinder member is disposed, the bracket member being attached to the other of the vibration source and the vehicle body; a pair of vibration isolation legs formed of an elastic material, the vibration isolation legs comprising ends connected to an outer surface of the internal cylinder member and the other ends connected to an inner surface of the inner hole of the bracket member by insert molding; and a pair of outer members formed of a metal material and buried respectively in the other ends of the vibration isolation legs, wherein the vibration isolation legs and the outer members are symmetrically arranged with the internal cylinder member being disposed therebetween, and an injection gate for injecting the resin material of the bracket member is disposed at a position spaced the same distance from the vibration isolation legs and the outer members, wherein each of the outer members comprises: a base plate part to which the other end of one of the vibration isolation legs is connected by vulcanization adhesion; and plate-shaped extension wall parts extending from outer edges of the base plate part toward the bracket member for being buried in the bracket member for engagement with the bracket member, wherein each of the vibration isolation legs comprises: a base plate covering rubber part that covers the base plate part of one of the outer members; and wall covering rubber parts extending from the base plate covering rubber part and covering the extension wall parts in a state where at least a portion of the wall covering rubber parts protrude from an outer surface of the bracket member, wherein a portion of the bracket member is fitted in a space surrounded by the base plate covering rubber part and the wall covering rubber parts, wherein a notch is formed in at least portions of the extension wall parts of the outer member and the wall covering rubber parts of the vibration isolation leg that are close to the injection gate.