Abstract: An apparatus for controlling the movement of a movable tail-gate hinged to a tipping body of a vehicle. A collapsible toggle linkage is pivotally connected at one end to a flap adapted to bear against the tail-gate and the opposite end of the linkage is pivotally connected to a support secured to the vehicle. The toggle linkage is moved between erect and collapsed conditions by a piston and cylinder assembly, the piston rod of said assembly being connected to the interconnected ends of the toggle linkage by a bracket. The bracket serves as a stop to prevent outwardly collapsing movement of the toggle linkage. The tail-gate can be maintained in a closed position independently of any forces exerted by the piston and cylinder assembly.