Patent ID: 7448605
Filing Date: 2008-11-11
Classification: F16F

Abstract:
1. A controllable hydraulic vibration-damping support designed to be interposed for vibration-damping purposes between first and second rigid elements, said vibration-damping support comprising: first and second strength members serving to be fastened to two rigid elements to be connected together; an elastomer body which connects the two strength members together and which defines, at least in part, a working chamber filled with liquid; an auxiliary chamber itself filled with liquid, communicating with the working chamber via a first constricted passageway; a pneumatic chamber separated from the auxiliary chamber by a moving wall formed in a cup having a wall; and an electrically controlled vent device for establishing a connection to the air, which device can be actuated electrically in order to put the pneumatic chamber into communication with the atmosphere via a check valve having a valve seat normally allowing air to flow only out from the pneumatic chamber towards the atmosphere and not to flow into the pneumatic chamber from the atmosphere; wherein, between the valve seat and the inside surface of the pneumatic chamber, there is defined a dead volume of less than 0.3 cm 3 and characterized in that the valve seat is formed in the wall of said cup.