Ships – Scows – Dumping and unloading
Patent
1991-09-24
1993-08-24
Mitchell, David M.
Ships
Scows
Dumping and unloading
114 26, 114270, 4141377, B63B 3530
Patent
active
052379469
ABSTRACT:
A method of disposal of waste material on subaqueous ground is disclosed, and comprises transporting the material to a location above a selected site for disposal, conveying the material in a vessel to a level at, or close to, the subaqueous ground, and depositing the material onto the subaqueous ground. The vessel travels under free-fall conditions for part of its descent. Also provided is a vessel which comprises a generally cylindrical body comprising a containment area having an opening at its upper end for receiving material which is to be transported by the vessel, and having at its lower end means for permitting egress of the material. The vessel is provided, at a position intermediate its upper end and its center of mass, with at least two [wing-like] wing members at diametrally opposed positions; and is also provided with means for pivoting the [wing-like] wing members between a first position in which they lie substantially flat against the exterior of the vessel and a second position in which they extend outwardly from the body of the vessel. In the second position, they present an increased surface area to the surrounding water and provide thereby a decelerating effect on the motion of the vessel when the vessel is moving downwardly within the body of water. A marine system for subaqueous waste disposal is also disclosed, which comprises a ship and a vessel generally as described above.
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Avila Stephen P.
Mitchell David M.
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