Coupling

FIG. 1 is a perspective view of a coupling embodying our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The evenly dashed broken lines illustrate portions of the coupling that form no part of the claim.

The dash-dot broken lines in the drawings illustrate boundaries of the claimed design.