Abstract: The device includes solid force transmission elements including two reinforcements, a damping body, a damping space including a damping chamber, the device being normally in a filling state where the damping space is filled with a damping liquid and may accidentally be in a state of loss of filling, which has an integrated element, specific and proprietary, palliative for the loss of filling, inactive in the state of filling and made active in the state of loss of filling where they bring the hydroelastic device to a state of stiffness of a high level, such element including a locking system including a locking part, integrally rigid, and a deformable load part controlled by the state of the device with respect to filling.

Abstract: The device includes solid force transmission elements including two reinforcements, a damping body, a damping space including a damping chamber, the device being normally in a filling state where the damping space is filled with a damping liquid and may accidentally be in a state of loss of filling, which has an integrated element, specific and proprietary, palliative for the loss of filling, inactive in the state of filling and made active in the state of loss of filling where they bring the hydroelastic device to a state of stiffness of a high level, such element including a locking system including a locking part, integrally rigid, and a deformable load part controlled by the state of the device with respect to filling.

Abstract: A hydro-elastic support mounted between two mechanical elements, subjected to excitations of variable frequencies, and able to provide two levels of stiffness by simple outside control includes an elastic vault adapted to be fastened to one of the mechanical elements, a support adapted to be fastened to the other mechanical element, an upper fluid chamber, a compensation chamber limited by a membrane, a helical duct providing a communication of the fluid between the two chambers, and a central piston for compensation of movement of the fluid from the upper fluid chamber to the compensating chamber. The piston can be immobilized by any time by an integrated mechanism that can be controlled remotely.