Patent ID: 6679339
Filing Date: 2004-01-20
Classification: A01B

Abstract:
Agricultural implement lift structure for an implement including a frame having a forward frame member, a hitch connected to the forward frame member and adapted for attachment to a towing vehicle for forward movement through a field, and a rear frame portion located aft of the forward frame member, the lift structure comprising:a rockshaft having end portions; bearing structure connecting the end portions to the forward frame member for rotation about an axis transverse to the forward direction; lift arms extending radially from the end portions adjacent the bearing structure; lift cylinders connected between the frame and the lift arms for rotating the rockshaft about the axis; lift wheel structure connected to the rear frame portion behind rearwardly of the bearing structure; and fore-and-aft extending lift links connected at forward ends to the lift arms and at rearward ends to the lift wheel structure for operating the lift wheel structure to raise and lower the frame as the rockshaft is rotated.