Patent ID: 8490741

Claim:
A straight motion assisting device for a work machine, wherein the device receives an input indicative of a steering angle from a position of a moveable member and applies a restoring force for affecting the work machine towards a straight motion when the steering angle input indicates that the work machine deviates from the straight motion, wherein the device comprises a hydraulic system that is effected by displacement of the moveable member and that applies the restoring force, the hydraulic system comprising a hydraulic cylinder with a piston that is reciprocable in the cylinder, the piston being connected to the moveable member for movement in the cylinder in response to displacement of the moveable member, the hydraulic system comprising at least one pump which is operatively connected to the hydraulic cylinder for moving the piston by pressurizing an interior space of the hydraulic cylinder, wherein the at least one pump is arranged to be operated in response to the work machine being in motion.