US Patent 8347529 Machine attachment based speed control system

A machine configured so that its ground speed is at least in part dependent on the measured force that is applied to an attachment attached thereto is provided. An attachment for a machine that is configured to provide feedback to the machine it is configured to be attached to, wherein the feedback is representative of the force applied to the attachment is also provided. Also provided is a method of automatically controlling the ground speed of a machine based on feedback measured in an attachment attached to the machine.