Abstract: A hydraulic antivibration support includes an inner rigid strength member and an outer rigid strength member which are interconnected by an elastomer body. At least two liquid-filled chambers are defined, at least in part, by the elastomer body and are interconnected via at least one narrow channel. The elastomer body includes a central portion having at least two support arms that extend radially between the inner strength and the outer strength member. The support arms are adapted to support an axial load and enable relative axial motion between the two strength members. Each of the support arms is disposed between two of the chambers. The elastomer body further includes respective flexible walls defining the inside of each chamber, each flexible wall having two lateral edges that extend axially and each of which is connected to a support arm in the vicinity of the outer strength member.

Abstract: The hydraulic antivibration mount is doubled up and practically symmetrical about a horizontal plane P. It comprises two rigid endpieces (1, 3) interconnected by an annular wall made of elastomer (5), with two flexible liquid-tight bellows (6, 10) and two intermediate rigid partitions (7, 11) respectively fitted with constricted passages (8, 12) and with decoupling valve members (9, 13).

Abstract: Several improved embodiments of surface effect dampers that produce a damping force including both hysteretic and frictional components. Various improvements include an amplitude sensitive feature or decoupler mechanism to eliminate or greatly reduce the damping for low amplitude input conditions as compared to high amplitude inputs, provisions for increasing the damping force in a non-linear manner, and features for providing significantly greater damping in one direction than the other. Other embodiments include an improved rotational surface effect damper useful for damping rotational motion, and a multiaxial damper which can be used, for example, as a motor mount which has the capability for the piston to tilt relative to the axis of its piston rod, allowing accommodation of torsional rotation of the engine while not compromising vibration isolation.