Towed implement

In a towed implement having an undercarriage supported on wheel arrangements coupled to opposite sides of the undercarriage by a wheel support arm pivotally coupled in a trailing fashion to said undercarriage, and a suspension arrangement operatively coupled between said undercarriage and each wheel support arm, the suspension including an extensible and retractable powered actuator having a cylinder and a piston rod coupled to a piston received in said cylinder for movement between first and second ends of said cylinder, and a spring arrangement including a gas pressure reservoir operatively coupled to said first end of said cylinder for resiliently resisting movement of said piston in said cylinder toward said first end of said cylinder and storing energy when said cylinder is moved toward said first end in response to an impact force input caused by said wheel engaging an obstacle such as to cause said wheel to become airborne, the improvement comprising:

• said spring arrangement further including a damping arrangement operating so as to resiliently resist movement of said piston toward said second end of said cylinder in response to a release of said stored energy when said wheel is off the ground and returning to ground contact.