Patent ID: 7810823
Filing Date: 2010-10-12
Classification: A01B,B62D

Abstract:
1. A multi-wheel oscillating tandem steering system for a pulled agricultural implement, comprising: first and second in-line axles pivotably coupled with a frame; at least first and second in-line wheel arrangements including a plurality of wheel assemblies arranged in-line and pivotably coupled with said first and second axles respectively, each wheel arrangement having wheel linkages coupling the in-line wheel assemblies such that in-line wheel assemblies oscillate together; wherein said wheel linkages each include a rotating coupling pivotably connected to the corresponding in-line axle, and a plurality of arms, each arm being connected to a wheel assembly and to the rotating coupling such that rotation of the rotating coupling causes each of the connected in-line wheel assemblies to turn; and a right-to-left linkage coupling the rotating coupling of the wheel linkage of the first in-line wheel arrangement to the rotating coupling of the wheel linkage of the second in-line wheel arrangement so that said first in-line wheel arrangement oscillates at a steering angle proportional to that of said second in-line wheel arrangement; wherein said wheel linkages and said right-to-left linkage are arranged such that each of said in-line wheel assemblies is caused to oscillate passively to steering angles that follow a vehicle towing said agricultural implement, and when in a turn, an inside wheel arrangement turns at an angle greater than an outside wheel arrangement.