Patent ID: 6420798
Filing Date: 2002-07-16
Classification: A01B

Abstract:
A device for setting the length of a top link of an attaching device of a tractor, comprising:a top link; two lower steering arms; a power drive directly coupled with said top link for providing length settings of said top link; a displacement sensor for generating an electric actual length signal which represents the respective actual length setting of the top link; a lift position sensor for generating an electric signal representing the actual lift position of the lower steering arms; storage unit for storing a nominal length setting of the top link, said nominal length setting relates to the respective actual lift position, and when a new actual lift position is reached, said storage unit generates an electric control signal corresponding to the nominal length setting of the top link; and a control unit including a comparator comparing the control signal with the actual length signal and actuating the power drive as a function of the deviation of the respective actual length signal from the control signal.