Yaw damper with pump

A yaw damper for damping yaw motions between first and second vehicle parts, the yaw damper comprising:

• a cylinder part provided with a fastening to one of said first and second vehicle parts;
• a piston part displaceable in said cylinder part and provided with a fastening to the other of said first and second vehicle parts, wherein said piston part comprises a piston which divides said cylinder part into first and second chambers, connecting lines with one-way valves accommodated therein arranged between said first and second chambers, said connecting lines with one-way valves determining a piston/cylinder damping characteristic;
• a fluid reservoir connectable to one of said first and second chambers;
• and
• pumping means driven by a displacement of said piston part with respect to said cylinder part, said pumping means having an inlet and an outlet, said inlet being connected to said fluid reservoir and said outlet being connected to each of said first and second chambers independently via first and second non-return valves, respectively, said pumping means being constantly effective irrespective of a position of said piston part with respect to said cylinder part.