Coupling Device

FIG. 1 is an isometric view of a coupling device showing the claimed design;

FIG. 2 is another isometric view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevation view thereof;

FIG. 6 is another side elevation view thereof;

FIG. 7 is a perspective end view thereof; and,

FIG. 8 is another perspective end view thereof.

The broken lines in the figures show portions of the coupling device that form no part of the claimed design.