Abstract: A control system for controlling different aspects of an earth moving vehicle such as a caterpillar is disclosed. The system utilizes movement of the forearm, wrist, fingers and thumb to control at least five functions. Multiple pivot points allow the control system to move different parts in two different directions each and can be used independently of one another. The control system can also be utilized in controlling a variety of devices other than earthmoving vehicles.

Abstract: A surface engaging implement having a surface penetrating member, a depth regulation member, a pressure sensor, a processor, and a variable controllable downpressure source is disclosed. The pressure sensor is disposed to detect loads upon the depth regulation member and to communicate load information to the processor. Through the processor, the controllable downpressure source may dynamically alter the pressure applied through the depth control structure to cause a desired excess downpressure and prevent an undesirably large or small amount of downpressure upon the depth regulation member. In this manner, a generally desired amount of excess downpressure may be dynamically maintained to maintain the ground penetrating member at a generally desired penetration depth.