Swirl Sprinkler

FIG. 1 is a top perspective view of swirl sprinkler showing my new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a left view thereof; FIG. 5 is a right view thereof; FIG. 6 is a top view thereof; FIG. 7 is a bottom view thereof; and, FIG. 8 is a bottom perspective view thereof. The broken lines in the drawing are depict portions of the swirl sprinkler and form no part of the claimed design.