Abstract: A gate apparatus includes a frame that is approximately in a shape of a letter “U”, a gate that opens forward or backward, a rotational support device that supports the gate so that the gate rotates and moves upward relative to the frame, a locking device that locks the gate at a closed position, and a pedal device that unlocks the locking device. The pedal device includes a pair of pedals on the both sides of the gate, and a push-up member that is linked to the pair of pedals. The push-up member includes a push-up surface that tilts when the pedal is operated. The push-up surface tilts so that the push-up surface moves upward and comes in contact with the gate on the side closer to the pedal that has been operated, and applies a push-up force and a rotation force to the gate.

Abstract: An automatic gate opening device is claimed comprising: a gate drive axis (134), movable between a gate closed position and a gate open position; a treadle (102) and a rechargeable energy storage means (16, 118). The device also comprises an energy conversion means to convert stored energy into rotational movement of the drive axis (134) in a gate opening and energy conversion means to convert stored energy into rotational movement of the drive axis in a gate closing direction. The treadle (102) is configured such that, with the drive axis (134) in its gate open position, a single actuation of said treadle (102) recharges the energy storage means with sufficient energy to move the drive axis from its gate open position to its gate closed position and back to its gate open position.

Abstract: A gate structure is mounted for pivotal movement about a horizontal axis between a closed raised position and a lowered open position. A pair of operating mechanisms each include a horizontal member and a pair of support members. The horizontal members are pivotally connected at their medial portions to the gate structure. The opposite ends of each of the horizontal members are pivotally connected to one end of the associated support members which in turn have the opposite ends thereof mounted for pivotal movement about horizontal axes. Closing devices are connected to opposite sides of the gate structure for normally maintaining the gate structure in its closed raised position.

Abstract: A ramp-operated mechanical gate system, including vertically-swinging gate, sliding gate and side-swinging gate embodiments which utilize collapsible ramps to supply energy to open a gate so that the gate is opened automatically when the collapsible ramp is depressed by an approaching vehicle and is closed automatically when the vehicle drives through the gate and the ramp is no longer depressed.