Coupler for windshield wiper

FIG. 1 is an upper perspective view of a coupler for windshield wiper;

FIG. 2 is another upper perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is an end view thereof;

FIG. 6 is an opposite end view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings depict portions that form no part of the claimed design.