The ornamental design for a rebreatherdevice, as shown and described.
FIG. 1 is a perspective view of a rebreather device showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is an bottom view thereof;
FIG. 8 is a perspective view thereof shown donned by a user; and,
FIG. 9 is a perspective side view thereof.
The broken line showing of the human figure in FIGS. 8-9 depict environment that forms no part of the claimed design. All other broken lines in the drawings depict portions of the rebreather device that form no part of the claimed design.