Elastomeric mount with hydraulic damping

Claim 1

A mount for securing two relatively displaceable bodies to each other with limited relative freedom of movement, comprising: a resiliently deformable first wall adapted to be secured to one of the bodies; a second wall forming with said first wall a substantially closed chamber filled with a hydraulic liquid, said second wall being securable to the other of said bodies; a substantially continuous partition subdividing said chamber into a pair of compartments respectively bounded by said first and second walls, said partition including (a) an elastically deformable and relatively stiff imperforate annular outer portion extending radially inward from a junction of said walls, (b) an elastically deformable and relatively yieldable imperforate annular intermediate portion of lesser thickness than said outer portion extending radially inward from said outer portion, (c) a rigid central portion of substantially the same thickness as said intermediate portion disposed within and supported by said intermediate portion, said central portion having at least one throughgoing orifice; and a pair of apertured annular stop members spacedly bracketing said central and intermediate portions, said stop members being supported on opposite surfaces of said outer portion adjacent an inner periphery thereof and at a radial distance from said walls for limiting the amplitudes of excursions of said central portion relative to said outer portion, the spacing of said stop members from each other being at least equal to the thickness of said outer portion.