Ships – Towing or pushing – Submerged object
Patent
1976-01-20
1977-05-17
Crowder, Clifford D.
Ships
Towing or pushing
Submerged object
37 72, 141287, 141388, 277 343, 285 97, B63B 2162, B67C 334
Patent
active
040235181
ABSTRACT:
A system of subaqueous excavation and material removal having the combination of a hopper dredging vessel, hopper barges with independent dumping capacity and a prime mover vessel such as a tug, each barge having a stern notch and a bow portion which is contoured to be received in a like stern notch of an adjacent barge so that two or more barges can be arranged and affixed into an assemblage, end-to-end with bow portions fitting into the stern notches. Conduits to carry dredged material are located on the stern and bow of each barge and bow of the dredging vessel. The outlet conduit is received by the inlet conduit when the bow of the vessel or barge is received in the stern notch of the barge. The diameter of the outlet is about two feet less than the diameter of the inlet to minimize the possibility of the outlet not being received in the inlet due to a slight misalignment of the vessels. For providing a tight connection of the conduits when the barge and dredging vessel or barges are secured together as aforesaid, each unit has a tubular outlet extending proximate the bow portion which is received in a larger tubular inlet extending proximate the stern notch, there being an arrangement of annular members about the engaging conduit members which are expansible through air under pressure delivered by pneumatic lines from air pressure sources preferably on the dredging vessel and which securely connect the conduits together whereby dredged material may be delivered from the dredging vessel simultaneously to each of the barges in the assemblage. The connection of the units is accomplished without any rigid structural linkage over a relatively broad and large surface area whereby unwanted redundancy of strength at the connection is largely eliminated.
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