Abstract: A dozer blade control system controls the position of a bulldozer blade, maintaining the blade at a constant position as the dozer travels through a worksite. The control system monitors the angle of the dozer blade with respect to the earth and when it senses that the dozer blade is tilting, it corrects the dozer blade's position by extending or retracting hydraulic cylinders that couple the dozer blade to the chassis of the crawler-tractor. When the dozer chassis pitches forwards, the blade begins to tilt forward and to drop closer to the ground. The control system senses this forward rotation of the blade and retracts the hydraulic cylinders that couple the blade to the chassis, causing the blade to return to and maintain its original position.

Abstract: An adjustable control attachment includes a pivot plate pivotally attached to each side of a control console with a control lever shaft connected and movable with each pivot plate. A plurality of control levers are pivotally mounted on each shaft and a flexible control cable is connected to each lever and adapted to be connected to a hydraulic control valve. A cable supporting bracket is connected to each of the pivot plates and is connected to and supports the control cables. A control actuating rod is pivotally connected between the vehicle and each of the pivot plates for creating an elliptical movement of the controls as the console is moved.