Abstract: An articulated marine fluid loading arm comprising rigid, pivotally-interconnected inner and outer arm members with the inner arm member pivotally mounted on an upstanding riser for movement about horizontal and vertical axes, and a system for controlling the arm during emergency disconnection thereof from a tanker or other marine vessel. The system includes an auxiliary counterweight movably mounted on a support beam that is fixed to, and extends rearwardly from, the riser end of the inner arm member, and a hydromechanical system for automatically adjusting the position of the auxiliary counterweight between that wherein the loading arm is substantially balanced in an empty condition and that wherein the arm is substantially balanced in a fluid-filled condition.

Abstract: An articulated fluid loading arm for delivery of gasoline or other liquids through a drop pipe into a tank truck or railway tank car. The arm is equipped with a control system comprising a hydraulic jack for regulating the angle defined by the inboard and outboard arm sections, a sensor system that senses a change in the attitude of these two arm sections and actuates the hydraulic jack to maintain the drop pipe in an established azimuthal position as it is lowered into and raised out of the tank truck or tank car hatch, and means for adjusting the sensor system to make it functional for various locations of the drop pipe.