| CPC E05B 47/0001 (2013.01) [B25H 3/00 (2013.01); E05B 2047/002 (2013.01); E05B 2047/0024 (2013.01); E05B 2047/0026 (2013.01); E05B 2047/0084 (2013.01); E05B 2047/0094 (2013.01)] | 20 Claims |
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1. A locking device comprising:
a locking arm movable between a locked position and an unlocked position;
a shaft including a first set of gear teeth and a set of ratchet teeth that engage the locking arm so as to move the locking arm between the locked position and the unlocked position;
a key-driven actuator configured to rotate the shaft with movement of a key;
a motor-driven assembly configured to selectively engage the shaft and rotate the shaft, the motor-driven assembly comprising:
a motor;
a rotatable screw coupled to the motor;
a gear comprising a second set of gear teeth on an outer perimeter of the gear, a first cam surface on an inner perimeter of the gear and a second cam surface on the inner perimeter of the gear, wherein the first cam surface and the second cam surface extend from the inner perimeter of the gear towards a center of the gear, and wherein the second set of gear teeth engage the rotatable screw; and
a clutch configured to selectively engage the shaft upon rotation of the gear, the clutch including a first pawl configured to be actuated by the first cam surface, when the gear rotates in a first direction, so as to engage the first set of gear teeth of the shaft and a second pawl configured to be actuated by the second cam surface, when the gear rotates in a second direction, so as to engage the first set of gear teeth of the shaft, wherein the first and second pawls are configured to disengage with the shaft when the rotatable screw is stationary.
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