Elastically yieldable block structure, in particular for the suspension of an engine of a vehicle

An elastically yieldable block structure comprising a moulded block of elastomer having a first face and a second face opposed to the first face, a first armature connected to the block adjacent said first face and a second armature connected to the block adjacent said second face, cavities in the block each of which cavities extends from said first face toward said second face, a liquid filling the cavities, the cavities comprising a main centre cavity which is laterally defined by walls which are part of the block and have a high resistance to the inner pressure of the liquid and has a closed end between said first and second faces and at least two lateral cavities, at least two grooves in said first face of the block and respectively putting the two lateral cavities in communication with the centre cavity, the lateral cavities being defined laterally by lateral walls of the block which have at least a part which has a low resistance to the inner pressure of the liquid which is lower than said high resistance, the lateral cavities having a closed end remote from said first face, said cavities and the groove having surfaces having a draft throughout their extent from said first face so as to permit an easy withdrawal of a single mould from said first face of the block, a single closing plate in contact with portions of the block delimiting in said first face the centre cavities, the lateral cavities and the grooves and thereby closing the cavities off from each other except in the region of the grooves, and means fixing said plate against said first face of the block.

An elastically yieldable block structure for combination with and interposition between an engine and a support for the engine, the block structure comprising a moulded block of elastomer having a first face and a second face opposed to said first face, a first armature connected to the block adjacent said first face and a second armature connected to the block adjacent said second face, a liquid filling the cavities, the cavities comprising a main centre cavity which is laterally defined by walls which are part of the block and have a high resistance to the inner pressure of the liquid and has a closed end between said first and second faces and at least one lateral cavity, at least one groove in said first face of the block and putting the lateral cavity in communication with the centre cavity, the lateral cavity being defined laterally by lateral walls which are part of the block and have at least a part which has a low resistance to the inner pressure of the liquid which is lower than said high resistance, the lateral cavity having a closed end remote from said first face, said cavities and the groove having surfaces having a draft throughout their extent from said first face so as to permit an easy withdrawal of a single mould from said first face of the block, a single closing plate in contact with portions of the block delimiting in said first face the centre cavity, the lateral cavity and the groove and thereby closing the cavities off from each other except in the region of the groove, and means fixing said plate against said first face of the block, the groove having a length which is such that the frequency of resonance of the mass of liquid in movement in the groove substantially coincides with the frequency of resonance of the engine on said support.