Patent ID: 8403309

Claim:
A vibration isolating apparatus for supporting a vehicle engine, said apparatus comprising: a first ring and a second ring each having a respective central axis; a rod portion connecting the first and second rings, the first and second rings and the rod portion being integrally formed from a resin or metal material; and inner cylinders which are inserted into the first and second rings, respectively, through rubber elastic bodies; wherein the rod portion is formed in an asymmetrical branched shape comprising a connection part, an upper branch portion and a lower branch portion, the lower branch portion extending in a downward direction from the connection part and being connected to the first ring, said branch portions diverging outwardly away from the connection part to the first ring which supports the vehicle engine, wherein the branch portions have an open cavity formed therebetween with respect to a central portion between the first and second rings, the open cavity being a through cavity and extending to a vicinity of a tip end of the upper branch portion; the open cavity being formed in an asymmetric shape in relation to a plane bisecting the rod portion between the first and second rings such that the upper branch portion is narrower than the lower branch portion; the upper branch portion being connected to the first ring at an upper side of the first ring, wherein the upper branch portion terminates at the upper side of the first ring; wherein the cavity exclusively originates at said central portion between the first and second rings in an up-down direction of the rod portion, and extends from said central portion in an upward direction to the vicinity of the tip end of the upper branch portion and reaches an upper portion of the first ring; wherein the first ring connects to the vehicle engine and the second ring connects to a body of a vehicle; wherein the upper and lower branch portions are configured differently from one another to provide a rigidity difference therebetween, and the rod portion at the side having low rigidity is configured to break when a predetermined load or greater is applied thereto to allow the vehicle engine to move in a predetermined direction; and wherein the upper branch portion has a lower rigidity than a rigidity of the lower branch portion.