Abstract: A scissors jack is adapted to be mounted permanently to the bottom frame of a vehicle and enclose the working members of the jack in the closed position. Generally, four of these scissors jacks will be mounted on the four opposite corners of the vehicle to level and stabilize the vehicle when the jacks are extended to their open position. The scissors jack has two opposed pairs of channel-shaped scissors arms. Each pair of arms is pivotally secured at a first end of the arms with the second ends having teeth formed therein. The upper arms of each pair are hingedly connected to a mounting member with their teeth intermeshed and the lower arms of each pair are hingedly connected to a baseplate with their teeth intermeshed. The second ends are mounted in the baseplate and mounting plate by rivets and each pair of rivets has a strap secured on the inside thereof to keep the teeth engaged and to relieve the stress on the rivets.

Abstract: A collapsible airstream deflector is secured to the roof of a towing vehicle to deflect air over a towed vehicle when the vehicles are in motion to reduce the air resistance or drag and fuel consumption of the vehicles. The airstream deflector has pivotal arms secured to the rear surface of a sheetlike airstream deflecting member. The arms respectively are swung to planes, each of which is generally perpendicular to the plane of the deflecting member, the arms being locked in place by means of a single removable locking bar applied to the ends of the arms before the deflector is secured to the roof. When the deflector is removed from the vehicle roof, the locking bar is removed; then the arms are swung against the rear surface of the deflecting member so that the deflector can be easily stored. Notwithstanding the fact that the arms are easily pivotable, the deflector is self-stabilizing when the arms are locked in their operative positions by the removable locking bar.