Patent ID: 8186449
Filing Date: 2012-05-29
Classification: A01B

Abstract:
1. An implement including a frame and wheel assemblies supporting the frame for movement in a forward direction over level ground and over irregular ground surfaces, the implement comprising: said frame including a transversely extending rear frame member; said wheel assemblies including at least one wheel assembly having a wheel bracket structure mounted to said rear frame member; first and second downwardly and rearwardly inclined wheel arms being spaced transversely from each other and each having upper and lower ends and being connected at the upper end to the wheel bracket structure for rocking in an upright plane about an arm axis extending generally transverse to the forward direction; first and second ground engaging wheels respectively connected to the lower ends of the first and second wheel arms at transversely offset locations relative to each other and being centered within the respective upright planes in which the wheel arms rock; a transverse beam connected to the wheel bracket structure for rocking about a beam axis disposed generally transverse to the arm axes, the transverse beam having first and second ends; and first and second upright members respectively operably connecting the first and second ends of said transverse beam to the first and second wheel arms for constraining the wheel arms to move generally in opposite vertical directions as one or the other of said first and second ground engaging wheels pass over the irregular ground surfaces to maintain a generally uniform load on the first and second ground engaging wheels.