Attachment flange for flexible conduit

In a dredge having a pump;

• a sluice box;
• a distributor box having a front wall, a target plate fixedly mounted in the distributor box, said target plate substantially evenly distributing into the sluice box water and solids entrained in the water which impinge the target plate;
• and a flexible conduit having an inlet end and an outlet end, said conduit having an outer surface having a helical projection, said conduit being operationally connected to the pump;
• the improvements comprising:
• a flange mounted on said front wall of the distributor box, said flange having a bore sized to receive a flexible conduit within it, said bore having a helical indentation to receive the helical projection of the flexible conduit, the outlet end of said flexible conduit being threaded into the bore of the flange;
• a bore through the front wall of the distributor box sized and positioned so that the outlet end of the flexible coupling can project into the distributor box;
• whereby the distance between the outlet end of the flexible conduit and the target plate can be varied by rotating the conduit relative to the flange.