Patent ID: 8777280
Filing Date: 2014-07-15
Classification: E05B,E05C,Y10T

Abstract:
1. A lock device for ensuring a proper unlock sequence for an automated sliding gate, comprising: a keeper including an opening that does not have circular symmetry, the keeper also including an obstacle aligned with the opening and providing a bottoming point for a latch member entering the opening; a frame having both structural and protection encasing functionalities; a latch member projecting out from the frame and having a projection axis, the latch member being rotatable and translatable with respect to the frame respectively around and along the projection axis, the latch member being aligned with a direction of sliding motion of the sliding gate and with the opening of the keeper, the latch member having a lateral protruding tooth that can be axially and non-rotationally displaced across the opening when the lateral protruding tooth is rotationally aligned with a corresponding receiving portion of the opening; a coupling system between the frame and the latch member that links a specific translation of the latch member with a specific rotation of the latch member; a lock system that automatically engages upon a given axial displacement of the latch member into the frame, causing a one-way transition of the lock device from a stable unlocked state to a stable locked state, a manual unlock control for independently driving disengagement of the lock system to allow reverse transition from the stable locked state to the stable unlocked state; an electrically controlled actuator for independently driving the disengagement of the lock system to allow the reverse transition from the stable locked state to the stable unlocked state; a control system for causing the disengagement of the lock system that uses an electrical control signal to cause a transition from the stable locked state to a metastable unlocked state that is maintained until the latch member reaches a position of the stable unlocked state, the transition from the metastable unlocked state to the stable unlocked state triggered by a direct or indirect feedback of at least one chosen from the position of the latch member and an expiration of a temporized delay.