Patent ID: 9187024
Filing Date: 2015-11-17
Classification: A01D,B60P,B62D

Abstract:
1. A harvester header trailer, the trailer comprising a chassis, at least three steerable wheels each supported on one of a rear axle assembly and a front axle assembly, and a steering force transfer mechanism arranged to transfer a steering force hydraulically from a first one steerable wheel supported on the front axle assembly to a second one steerable wheel supported on the rear axle assembly, wherein a steering movement of the first one steerable wheel to one side effects a steering movement of the second one steerable wheel to the opposite side, wherein the steering force transfer mechanism comprises a first hydraulic cylinder mechanically coupled to a first linkage associated with the first one steerable wheel and a second hydraulic cylinder coupled to a second linkage associated with the second one steerable wheel, wherein each side of the first hydraulic cylinder is in hydraulic communication with a respective side of the second hydraulic cylinder, and wherein the front axle assembly is mounted to the chassis about a vertical steering axis by a front king pin.