Abstract: A temporary closure for containers such as storage tanks and the like has a cap portion with arcuate thread supports extending downward from a lower surface of the cap portion. The outer surface of the thread supports has screw threads thereon, the screw threads corresponding to screw threads on an inner surface of a tank opening. The closure is made of a one piece plastic material and the thread supports are flexible enough so that the closure can be quickly and easily inserted longitudinally into the tank opening with the screw threads on the closure overriding the screw threads in the tank opening. The closure is held in place in the tank opening by the screw threads and can be removed by turning or by prying the closure out of the opening with a suitable tool.

Abstract: An air deflector is used on a truck, there being one deflector for each side window. Each deflector has an oblong panel with means for mounting the deflector onto a front corner of the truck with an inner surface of the panel facing the truck and a longitudinal centre line of the panel being substantially parallel to a longitudinal centre line of said corner. The panel curves smoothly around said corner and the gap between the panel and the truck increases slightly from front to rear. The panel has a folded rear edge that is folded towards said truck. The panel is held in place by upper and lower brackets mounted between the deflector and the truck, the brackets continuously decreasing in width from front to rear of the deflector and being curved to correspond to the arcuate cross section of the panel. The deflector directs air beneath the side window nearest to it, thereby maintaining the cleanliness of the side window for a much longer period.