Patent ID: 8602153

Claim:
A work vehicle comprising: (a) an adjustable frame, including a front portion and a rear portion that are relatively moveable with respect to one another; (b) a first set of wheels supporting said front portion and a second set of wheels supporting said rear portion wherein each individual wheel supporting said front portion and said rear portion is configured to be independently driven and wherein each individual wheel supporting said front portion and said rear portion is configured to be independently steered in a pivoting angle adjusting, non-skid mode; (c) a lift mechanism coupled to the vehicle; (d) an engine coupled to said rear portion of the frame; and (e) a electro-hydraulic assembly comprising a sensor-responsive microprocessor controller configured to selectively control vehicle structural frame and balance adjustments, including adjustments of the length of said adjustable frame, driving of said vehicle being independent of said microprocessor controller, a plurality of sensors, at least one hydraulic pump, at least one hydraulic drive motor, and a valve network, wherein said electro-hydraulic assembly enables extension and retraction of the adjustable frame, driving of said wheels, and steering of said wheels.