Abstract: A hydraulic antivibration device comprising: two rigid strength members, a working chamber and a compensation chamber communicating with each other via a constricted passage, a decoupling flap being disposed between the two chambers, the flap being movable over a short stroke, at least one perforated rigid partition separating the two chambers, said partition being closed by the flap, the flap being in the form of a plate of elastically deformable material, and being disposed in an opening in a spacer clamped between two plane parallel grids disposed respectively in the working chamber and in the compensation chamber, the stroke of the flap between the grids being defined by the thickness of the spacer.

Abstract: A resilient suspension device for the exhaust pipe of any vehicle having an internal combustion engine, the device comprising a resilient body provided with fastener means for fastening both to the structure of the vehicle and to said exhaust pipe. The device is characterized in that it includes at least one transverse bar 8 carrying a counter-oscillating mass M, the end 9 of said bar remote from said mass M being included in a zone 16 of said body which is subject to vibration, and said bar 8 being held in a location situated between said zone 16 and said mass M by a relatively fixed portion 10 of said body, forming a pivot.