Patent ID: 7063167

Claim:
A system for leveling an implement having a tongue engageable to a towing vehicle for towing the implement, comprising: a hydraulic cylinder having a first hydraulic fluid port disposed to move the cylinder when filled with fluid in a first direction wherein the cylinder is mechanically culpable to the tongue to raise and lower the tongue with respect to the implement when the cylinder is actuated; a first gas-filled hydraulic accumulator fluidly coupled to the first hydraulic fluid port on the cylinder; a first on/off valve coupled between the first accumulator and the first hydraulic fluid port on the cylinder to connect and disconnect the first accumulator from fluid communication with the cylinder; a first directional control valve to selectively connect the first hydraulic port to a source of hydraulic fluid under pressure to fill the cylinder with hydraulic fluid and to a hydraulic tank to drain the cylinder of hydraulic fluid; and an operator-actuable switch for actuating the first on/off valve.