Patent ID: 7082744

Claim:
A harvester system, comprising: a towing vehicle with a sub-frame; a towed harvester vehicle including a frame and a harvesting mast movably mounted on the frame; a sub-frame mounted to the towing vehicle and attached to the harvester vehicle; a coupling engaging the sub-frame and the harvester vehicle, the coupling including a gimbal and a rotary faceplate; a proportional flow valve; a first hydraulic cylinder assembly mounted to a vehicle axle; and a second hydraulic cylinder assembly mounted to the coupling; wherein the flow valve controls fluid flow to the first and second hydraulic cylinder assemblies, and wherein the proportional flow valve is actuated upon tilting from an untilted position, and wherein flow is increased to a cylinder end of the first hydraulic cylinder assembly and the second hydraulic cylinder assembly in proportion to a tilt angle when the vehicle is tilted to a first side, and wherein flow is increased to a piston end of the first hydraulic cylinder assembly and the second hydraulic cylinder assembly in proportion to a tilt angle when the vehicle is tilted to a second side.