Means for a shock-absorber

A device for controlling the shock-absorbing capacity of the shock-absorber by means of control signals from an external control unit, said shock-absorber being of the type including a cylinder operating with a fluid and a piston arranged in the cylinder, said piston being provided with at least one passageway through which fluid is capable of being transferred from one side to the other side of said piston and vice versa comprising:

• a controllable means capable of being controlled by control signals from said control unit and in response to said signals varying the cross-sectional area of said passagewy thereby causing a variation in the shock-absorbing capacity, wherein each of the directions of the fluid flow is capable of being conducted through two parallel channels and wherein said control means includes a valve for determining the flow of a control fluid in the first channel for determining the position of a membrane, and another valve connected to the membrane for determining the flow of a master fluid in the other channel.