Patent ID: 6729611
Filing Date: 2004-05-04
Classification: B60G,F16F

Abstract:
An antivibration sleeve comprising:a rigid inner strength member which extends longitudinally along a central axis; and at least a first rigid annular strength member which surrounds the inner strength member and the central axis, and at least one elastomer body connecting the inner strength member to the first annular strength member, said elastomer body including two diametrically opposite arms each extending along a first radial direction from the inner strength member to said first annular strength member, the elastomer body being shaped so that the antivibration sleeve presents relatively high elastic stiffness in said first radial direction and lower elastic stiffness in a second radial direction substantially perpendicular to said first radial direction; wherein the inner strength member presents, at least in register with the two arms of the elastomer body, two wedge-shaped bearing zones which extend so as to converge towards the central axis in a first direction parallel to said central axis; wherein the first annular strength member also presents, at least in register with the two bearing zones of the inner strength member, first and second complementary bearing zones in the form of wedges which converge towards the central axis in said first direction; wherein each arm of the elastomer body is bonded to at least one of the bearing zones of the inner strength member and to one of the complementary bearing zones of the first annular strength member; and wherein the elastomer body is overmolded on the first annular strength member and said first annular strength member is surrounded by a second strength member which is secured to the first annular strength member and to the elastomer body, co-operating with said elastomer body to define first and second hydraulic chambers filled with liquid and separated from each other by the two arms of the elastomer body, the first and second hydraulic chambers communicating with each other via at least one narrow passage which is provided between the first bearing zone of the first annular strength member, and the second strength member.