The ornamental design for a dredger, as shown and described.
FIG. 1 is a left side view of a design for a dredger.
FIG. 2 is a right side view of the dredger of FIG. 1.
FIG. 3 is a top view of the dredger of FIG. 1.
FIG. 4 is a rear view of the dredger of FIG. 1.
FIG. 5 is a front view of the dredger of FIG. 1.
FIG. 6 is a right-rear perspective view of the dredger of FIG. 1; and,
FIG. 7 is a right-front perspective view of the dredger of FIG. 1.
The solid lines in FIGS. 1-7 illustrate a design for a dredger according to the present disclosure. A bottom view is not shown because there are no claimed features on the bottom view other than those features included in the views provided. The break lines in FIGS. 1-2 and the break lines in FIGS. 4-7 illustrate the extension of the dredger. The break lines and the extension of the dredger beyond the break lines form no part of the claimed design.
The broken lines in FIGS. 1-2 and 6-7 at the tread drive portion illustrate portions of the dredger that form no part of the claimed design.