Patent ID: 6401832
Filing Date: 2002-06-11
Classification: A01B

Abstract:
A lift wheel assembly for the frame of an agricultural implement adapted for forward movement over the ground, the lift wheel assembly comprising:a mount adapted for connection to the frame; a four-bar linkage including an upper link and a lower link, the links having proximate ends pivotally connected to the mount at vertically offset first pivot locations, and distal ends; a wheel mount pivotally connected to the distal ends of the links at vertically offset second pivot locations; a ground engaging wheel connected to the wheel mount; wherein the lower link comprises a fore-and-aft extending member having curved central portion opening downwardly away from the upper link and defining a wheel accommodating space below the four-bar linkage; a lift arm fixed to the curved central portion of the lower link and extending upwardly adjacent the upper link to an upper end portion above the upper link; and a motor connected to the upper end portion and operable to pivot the lower link between a transport position and a field-working position, so that substantially all loading between the wheel during operation of the motor is transmitted through the lower link.