Patent ID: 6932332

Claim:
A hydraulic antivibration support for interconnecting first and second rigid elements in order to damp and filter vibration between said elements at least along a main vibration axis, the support comprising: first and second rigid strength members for fastening respectively to the first and second rigid elements that are to be united; an elastomer body interconnecting the first and second strength members and adapted to accommodate a permanent load along the main vibration axis; a liquid-filled working chamber defined at least in part by the elastomer body; a flexible wall made of elastomer and secured to the second strength member; a liquid-filled compensation chamber defined in part by the flexible wall made of elastomer; a liquid-filled constricted passage putting the working chamber into communication with the compensation chamber; and a decoupling device comprising a decoupling valve member made of elastomer interposed between a first grid which communicates with the working chamber and a second grid which communicates with the compensation chamber, the decoupling valve member comprising at least one deformable membrane portion which is held in a rest position in the absence of vibration and which is adapted to move elastically between the first and second grids in the presence of vibration; wherein the deformable membrane portion, when in its rest position, is closer to the second grid than to the first grid; and wherein the decoupling valve member, excepting the membrane portion, is clamped between the grids.