Mining or in situ disintegration of hard material – With separation of materials – Material mined or excavated underwater
Patent
1976-10-05
1977-10-11
Crowder, Clifford D.
Mining or in situ disintegration of hard material
With separation of materials
Material mined or excavated underwater
37 58, 37 66, 37195, 37DIG8, 417 61, 417 77, E02F 388
Patent
active
040531813
ABSTRACT:
Apparatus for extracting mineral resources lying on the bottom of sea into a working ship floating on an ocean utilizing circulating current based on the difference of water levels. A hollow box shaped tank has its bottom opened and sunk liftably into the sea bottom through a rope from the working ship. The tank is equipped with a rotatory driving mechanism and trawled along the sea bottom while stirring it when the ship travels on the ocean. An elongated flexible coaxial pipe comprises an inner pipe and a coaxial outer pipe, each having at its lower end a fanwise shaped hopper mouth disposed within the tank through the upper wall thereof. The coaxial pipe passes through an internal seawater cistern in the bottom wall portion of the working ship and has its upper portion within an external seawater cistern mounted on the upper portion of the working ship. A suction pump is joined to the upper end of the coaxial inner pipe. Seawater contained in the internal cistern is continuously supplied through a line pump into the external cistern. Seawater and minerals contained in the tank are sucked into the external cistern through the coaxial inner pipe by the suction pump and the seawater is returned to the tank through the space defined by the outer wall of the coaxial inner pipe and the inner wall of the coaxial outer pipe utilizing the difference of levels between seawater within the external cistern and seawater within the internal cistern.
REFERENCES:
patent: 1461240 (1923-07-01), Godfrey
patent: 3260004 (1966-07-01), Brooks
patent: 3620572 (1971-11-01), Krutein
patent: 3693272 (1972-09-01), Gariel
patent: 3753303 (1973-08-01), Holzenberger et al.
patent: 3971593 (1976-07-01), Porte et al.
Crowder Clifford D.
Drucker William Anthony
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