SAMUEL K STELLFOX
Engineers in Pittsburgh, PA

4268204, May 19, 1981

Mar 29, 1979

6/024991

Samuel K. Stellfox - Pittsburgh PA
Hermann Urban - Pittsburgh PA

Dravo Corporation - Pittsburgh PA

B65G 6300

414139

A continuous type of bucket unloader especially useful in transferring bulk cargo from a floating ship to shore has a main loading boom with an endless bucket chain pivotally suspended at its shipside end and which is pivotally mounted between its ends on a horizontal pivot on the shipside end of a lever which, in turn, is pivotally supported on a horizontal pivot between its ends on a support structure that, in turn, is fixed on a gantry. The landside ends of the boom and the lever are counterweighted and adjustably connected to each other whereby the angular relation of the boom to the lever on which it is mounted may be varied, and the lever, in turn, has a fluid pressure cylinder and piston unit for pivotally adjusting its angle relative to its support on the gantry. The combination provides a wide range of adjustment for the continuous bucket chain which, in turn, discharges bulk cargo that it elevates from the ship's hold to a fixed receiving chute on the gantry, and the arrangement tends to maintain a substantial condition of balance crosswise and lengthwise of the wheel bearings of the gantry trucks in all positions of the continuous bucket conveyor.

4265579, May 5, 1981

Jun 27, 1979

6/052621

Laimons Naruns - Pittsburgh PA
Dennis W. Terry - Coraopolis PA
Samuel K. Stellfox - Pittsburgh PA

Dravo Corporation - Pittsburgh PA

B63B 2700, B66B 920

414138

A bulk material unloader in which a clamshell bucket is suspended from a boom which is luffed from a position over the material to be unloaded through the vertical to a position over a bulk material receiving hopper. The hoists and/or the anchors for the bucket hold and close ropes are mounted on the unloader base on the opposite side of the hopper from the boom pivot such that the suspended length of the hold and close ropes is increased as the boom is luffed through the vertical and the bucket is thereby lowered into the hopper with the hoists remaining inactive until the bucket is in position to be opened and discharged with minimum dusting effect.