Abstract: A gate assembly for a vertically pivoting gate includes a support and coil springs connected between the gate and the support to bias the gate toward a vertical, open position, as well as from the open position back to a horizontal, closed position. The springs are attached to the support, and cables extend from the springs to the gate. Sheaves mounted on the support engage the cables to induce the return bias in the springs to move the gate back to the closed position. The mounting for the sheaves includes a member engaging the gate to support the gate in a precisely vertical orientation when the gate is in the open position.

Abstract: A gate assembly for a motor driven vertically pivoting gate includes a support frame and coil springs attached between the gate and the support frame to bias the gate toward a vertical, open position and thereby assist the drive motor. A member secured to the support frame deflects the springs when the gate is in the open position, thereby placing the springs in tension so that the springs also assist the drive motor in starting the gate to move from its open position toward its closed position. The member also engages the gate when it is in its open position and supports the gate in a precisely vertical orientation.