Patent ID: 6955249

Claim:
Controlled oscillating damper, comprising: a housing provided with a cavity, an oscillating element moving sealingly within said cavity, in which the housing and the oscillating element have respective walls defining at least one damping chamber filled with magneto-rheological or electro-rheological fluid, and at least one electrically controlled excitation device equipped with at least one fluid passage which a fluid flow gets through during the motion of the oscillating element, the excitation device being designed to control the resistance of the fluid flow getting through said passage, wherein the excitation device is stationary with respect to the housing and is arranged so as to divide said damping chamber into two sections of variable volume communicating one with the other through said passage and wherein the oscillating element is provided with at least one compensation chamber filled with a gas and communicating with said damping chamber through at least one opening sealingly closed by a deformable element.