Method and apparatus for transporting material in a liquid having wave propagation

Claim 1

A DREDGING DEVICE FOR TRANSPORTING MATERIAL BENEATH A LIQUID SURFACE FROM ONE ZONE TO ANOTHER, SAID DEVICE BEING ACTUATED BY ENERGY ASSOCIATED WITH WAVES PROPAGATED IN SAID LIQUID, SAID DEVICE COMPRISING A FLOAT MEANS, A HORIZONTAL SUPPORT MEMBER ATTACHED TO EACH SIDE OF SAID FLOAT MEANS, AN ELONGATE MEMBER MOVABLY ATTACHED TO EACH OF SAID SUPPORT MEMBERS AND DEPENDING INTO SAID LIQUID TO A LEVEL BEYOND SAID FLOAT MEANS, A BAFFLE MOUNTED BETWEEN THE LOWER ENDS OF SAID ELONGATED MEMBERS AND SPACED FROM SAID FLOAT MEANS TO DEFINE AN UNOBSTRUCTED PASSAGEWAY THEREBETWEEN, SAID BAFFLE HAVING A SERIES OF OPENINGS DISPOSED AT DIFFERENT LEVELS IN SUBSTANTIALLY A COMMON PLANE WITH PIVOTALLY MOUNTED CLOSURE MEANS DEPENDING FROM HORIZONTAL PIVOT MEANS AT DIFFERENT LEVELS OVER EACH OF SAID OPENINGS, EACH OF SAID CLOSURE MEANS BEING LARGER THAN SAID OPENINGS AND SWINGABLE IN THE SAME DIRECTION FROM EACH LEVEL OF PIVOT MEANS TO UNCOVER SAID OPENINGS SO AS TO PERMIT LIQUID TO FLOW THERETHROUGH IN ONE DIRECTION ONLY, SAID ELONGATE MEMBERS BEING PIVOT-