Dredge with nozzle means for mixing air and water before emission thereof from said nozzle

Claim 1

APPARATUS FOR EFFECTING CLEARANCE OF SILT, MUD AND LIKE MATERIALS FROM THE BOTTOM OF WATERWAYS COMPRISING A SUPPORT STRUCTURE, A RIGID FRAME ASSEMBLY, A PLURALITY OF JET NOZZLES FIXEDLY MOUNTED ON SAID FRAME ASSEMBLY, BEARING MEANS MOUNTED ON SAID SUPPORT STRUCTURE, A RIDIG SUBSTANTIALLY VERTICALLY EXTENDING SUPPORT POST ROTATABLY AND SLIDABLY MOUNTED IN SAID BEARING MEANS, SAID FRAME ASSEMBLY BEING SECURED TO THE LOWER PORTION OF SAID POST FOR MOVEMENT THEREWITH, A LIFT MEANS MOUNTED ON SAID SUPPORT STRUCTURE, AND CONNECTED TO SAID SUPPORT POST FOR MOVING IT UP AND DOWN IN SAID BEARING MEANS SO AS TO PERMIT VERTICAL ADJUSTMENT OF SAID FRAME AND THE ASSOCIATED JET NOZZLES RELATIVE TO THE SUPPORT STRUCTURE, ROTARY MEANS MOUNTED ON THE SUPPORT STRUCTURE AND CONNECTED TO SAID SUPPORT POST FOR ROTATING IT IN SAID BEARING MEANS SO AS TO SLEW SAID FRAME AND THE ASSOCIATED JET NOZZLES HORIZONTALLY, AND SUPPLY MEANS MOUNTED ON SAID SUPPORT STRUCTURE AND CONNECTED TO SAID JET NOZZLES FOR SUPPLYING BOTH COMPRESSED AIR AND WATER UNDER PRESSURE THERETO IN SUCH A MANNER THAT THE AIR AND WATER ARE MIXED BEFORE BEING ISSUED FROM THE SAID JET NOZZLES.