Vehicle actuated gate opening/closing system

A gate opening system comprising:

• a barrier mounting adapted to support a barrier for a movement between an open condition and a closed condition,
• a retention means for securing the barrier in the closed condition,
• a drive element, and
• an actuator,
• the barrier mounting including a substantially post shaped element with a circular cross section and hollow center, allowing the barrier mounting and drive element to be nested concentrically one within the other and to allow the barrier mounting and drive element to rotate freely with respect to one another,
• the barrier mounting including bearing surfaces adapted to engage with lifting surfaces of the drive element,
• the bearing surfaces including projecting lugs engaging with the lifting surfaces to allow the lifting surfaces to bear and push against the barrier mounting,
• the drive element including said lifting surfaces disposed on opposite sides of the drive element to provide a balanced lifting force to the barrier mounting when the drive element is rotated,
• wherein the actuator is adapted to apply a rotational force to the drive element causing the barrier mounting to the first be lifted, disengaging the retension means so that the bearing surface and lifting surfaces then cooperate to rotate the barrier mounting.