The ornamental design for an aerodynamicdevice for a tank trailer, as shown and described.
FIG. 1 is an isometric perspective view of an aerodynamic device for a tank trailer, showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The aerodynamic device for a tank trailer is shown with a symbolic break in its length. The appearance of any portion of the aerodynamic device for a tank trailer between the break lines forms no part of the claimed design.
The broken lines illustrate portions of a tank trailer which form no part of the claimed design.