Abstract

Flexible side members of semi-rigid mold urethane extend between a pivotally mounted deflector panel and the cab roof. The side members are formed of a plurality of foldably interconnected triangular segments which fold and unfold relative one another during movement of the deflector panel between a raised air deflecting position and a stored position upon the cab roof. A guide rod is pivotally mounted upon the deflector panel and depends downward therefrom. A plurality of eyelets are provided on the triangular segments and slidably receive the guide rod. Accordingly, when the deflector panel is raised in the air deflecting position the guide rod and eyelets cooperate to support and control the side member segments against lateral movement. Upon collapse of the deflector panel to the stored position upon the cab roof the guide rod and eyelets maintain the segments in line with one another for controlled stacking one atop another.