Method and apparatus for recovery of sediments from the...

Details Method and apparatus for recovery of sediments from the... Method and apparatus for recovery of sediments from the...

E - Fixed Constructions

02

F

262/27

E02F 3/92 (2006.01) E02F 3/88 (2006.01) E02F 3/90 (2006.01) E21C 45/00 (2006.01)

Patent

CA 1135732

ABSTRACT OF THE DISCLOSURE A method and device are disclosed for the recovery of sediments from the bottom of the sea by means of a freely suspended suction pipe provided at one end with a suction mouth. The suction mouth is successively slowly lowered into the sediment to be recovered and is subsequently raised to a height at which it is freely laterally movable. The device is then shifted a predetermined distance and lowered again to repeat the cycle. The method according to this invention avoids the problem of the suction mouth laterally sliding into the depression previously formed in the sediment. The suction head includes loosening means which are construed to exert a low frictional resistance with respect to the sediment during lowering and penetration into the sediment but a high frictional resistance when pulled upwardly therefrom. Such a device is more versatile with various densities of sediment.

362814

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