Patent ID: 7513521
Filing Date: 2009-04-07
Classification: A01B

Abstract:
1. A method for automatically controlling a movable drawbar of a work machine while towing a load with the drawbar, comprising steps of: providing structure supporting the drawbar on the work machine for allowing relative movement therebetween responsive to varying loading conditions exerted between the load and the work machine; monitoring information representative of a position of the drawbar in relation to a predetermined position during relative movement of the drawbar and the work machine responsive to loading conditions exerted between the load and the work machine; automatically repositioning the drawbar to a position within a predetermined range including the predetermined position, responsive to information representative of at least movement of the drawbar beyond the predetermined range; and monitoring information representative of engagement and disengagement of a brake of the work machine and automatically holding the drawbar in a position responsive to engagement of the brake, and automatically releasing the drawbar responsive to disengagement of the brake.