IMPROVEMENTS ON DREDGING MACHINES

PERFECTIONNEMENTS AUX MACHINES A DRAGUER

Claims

Claim 1st A chamber designed to be imbedded in the material to be excavated and having a pipe or tube extending upwardly into a large pipe having its lower end similarly imbedded and its upper end reaching to the top surface of the water, in combination with a pipe leading into the same chamber for the purpose of conveying therein compressed air, steam, or any rapidly moving fluid, which, in escaping up through the small pipe, will create a vacuum in the large pipe causing the material surrounding the bottom end of the pipe to flow through it, which material has been previously loosened by a small jet of fluid escaping from the chamber. 2nd A large pipe, the bottom end of which is placed in proximity to the material to be excavated, in combination with a small pipe extending upwardly into the large pipe and having an inverted cone-shaped nozzle fixed to its end, so as to act as a deflector on the fluid forced rapidly through the small pipe and direct the said fluid against the interior surface of the large pipe, thereby forming a cone-shaped column of rapidly moving fluid, which will effectually create the desired flow of material through the large pipe. 3rd A large pipe having a bell mouthed end placed in proxim¬ity to the material to be excavated, in combination with a small piped placed within the large pipe, so as to direct through the said pipe rapidly moving fluid forced from the small pipe. 4th A circular chamber B connected to the chamber C by the tubes D, the said cham-ber C having a small orifice or orifices made in its bottom or sides, and a pipe E extending from it up into the pipe A, in combination with a pipe F leading into the chamber B, for conveying therein any rapidly moving fluid.