Patent ID: 8510992

Claim:
An automatic gate opening device comprising: a gate drive axis, movable between a gate closed position and a gate open position; a treadle; rechargeable energy storage means; energy conversion means to convert stored energy into rotational movement of the drive axis in a gate opening direction; and energy conversion means to convert stored energy into rotational movement of the drive axis in a gate closing direction; wherein the treadle is configured such that, with the drive axis in said gate open position, a single actuation of said treadle recharges the energy storage means with sufficient energy to move the drive axis from said gate open position to said gate closed position and back to said gate open position wherein; the rechargeable energy storage means comprises a pair of springs; the energy conversion means to convert stored energy into rotational movement of the drive axis in said gate closing direction comprises a first drive rod connected to a first one of said pair of springs and movable between an extended and a retracted position; the energy conversion means to convert stored energy into rotational movement of the drive axis in said gate opening direction comprises a second drive rod connected to a second one of said pair of springs and movable between an extended and a retracted position; and as the treadle is actuated the drive rods are extended and said springs are stretched.