The ornamental design for a pusherdevice, as shown and described.
FIG. 1 is a left front side perspective view of the pusher device;
FIG. 2 is a left rear side perspective view of the pusher device;
FIG. 3 is a rear side view of the pusher device shown in FIG. 1;
FIG. 4 is a front side view of the pusher device shown in FIG. 1;
FIG. 5 is a left side view of the pusher device shown in FIG. 1;
FIG. 6 is a right side view of the pusher device shown in FIG. 1;
FIG. 7 is a top side view of the pusher device shown in FIG. 1; and,
FIG. 8 is a block side view of the pusher device shown in FIG. 1.
The subject matter shown in dashed lines, and any surfaces of the design not shown, including interior surfaces, form no part of the claimed invention.