Hutchinson

Daniel Gregoire

Pierre Jouade

Jean-Pierre Bretaudeau

Michel Pompei

Jean Ray

Marc Bernuchon

Philippe Lenormand

The hydraulic anti-vibration device comprises: an annular rigid endpiece (1) about a vertical axis (X); a rigid stud disposed coaxially with the endpiece; a frustoconical annular wall (3) made of elastomer that withstands axial compression and that is interposed between the endpiece and the stud; a watertight flexible membrane (4); a rigid intermediate partition (5) dividing the assembly into a working chamber (A) and a compensation chamber (B); a throttled passage (6) between the chambers; and a mass of liquid (L) filling the chambers and the passage, the stud being disposed inside the working chamber and constituting the head (2.sub.1) of a suspension rod (2), and the downwardly flared annular wall (3) extending upwards inside the bottom annular portion (12) of the working chamber. At least the bottom of said bottom annular portion is provided with at least one flexible blade-like obstacle (13).

Hydraulic anti-vibration devices

A hydraulic antivibratory support is provided comprising a rigid base (4), a rigid annulus (1), a resilient annular support wall (6) sealingly connecting the base to the annulus and a flexible membrane (7) sealingly connected to the annulus, the inside of the sealed case thus formed being divided by a sealed dividing wall into two chambers connected together through a restricted passage, and a liquid mass filling the two chambers. A traction resistant cable section (13) is situated inside the support and is fixed to the case and to the rigid annulus so that the relative movements of these two elements away from each other are limited by said cable section being placed under traction.

Hydraulic antivibratory supports

The invention relates to an antivibration support comprising, between two rigid elements, a box which defines two deformable chambers filled with liquid separated by a deformable partition and communicating with each other through a throttled passage. The partition is constituted by a diaphragm surrounded by a beading which is gripped between two perforated thin metal disks, the periphery of the first disk alone is overlapping and fixed to one of the rigid elements, and the passage comprises a curvilinear channel bounded by areas of the beading, of the first disk and of an elastic wall of the box.

Hydraulic antivibration supports

The shock absorber interposed between two pieces (1,3) comprises a sealed case with a deformable ring (4), a dividing wall (5) dividing the inside of the case into two compartments filled with liquid, a restricted passage (11) formed in a rigid ring (8) forming the periphery of the dividing wall and an impervious and continuous membrane (10) forming the center of the dividing wall. The periphery of one of the faces of the membrane is bonded to a flat annular bearing surface of the ring, a rigid floating washer (16) is added to the periphery of the other face of the membrane and two annular dividing walls (19 and 22) of the membrane mate on the inside with the ring and the washer.

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Chateaudun, France

Daniel Gregoire