An ornamentaldesign for a universal coupler, as shown and described.
FIG. 1 is a front perspective view of a universal coupler, in accordance with an embodiment, with flexible attachment members in an open position;
FIG. 2 is a rear perspective view of the universal coupler of FIG. 1, with flexible attachment members in a resting position;
FIG. 3 is a front view of the universal coupler of FIG. 1;
FIG. 4 is a rear view of the universal coupler of FIG. 1;
FIG. 5 is a right side view of the universal coupler of FIG. 1;
FIG. 6 is a left side view of the universal coupler of FIG. 1;
FIG. 7 is a top view of the universal coupler of FIG. 1;
FIG. 8 is a bottom view of the universal coupler of FIG. 1; and,
FIG. 9 is a front perspective view of the universal coupler of FIG. 1 coupled to a golf towel.
In the drawings, broken lines illustrate either portions of the universal coupler that form no part of the claimed design, or they show use and environment which form no part of the claimed design.