Control Knob for Barbecue Grill

FIG. 1 is a front, side perspective view for a control knob for barbecue grill showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front, side perspective view of the control knob for barbecue grill in an environment of use.

The broken lines in FIG. 3 show portions of the control knob for barbecue grill that form no part of the claimed design. The broken lines in FIG. 8 illustrate environment and form no part of the claimed design.