Patent ID: 8820127
Filing Date: 2014-09-02
Classification: E05B,Y10T

Abstract:
1. A pin-tumbler locking mechanism comprising: a lock-core with an elongated key slot and a series of bores arranged in a plane of the key slot; a corresponding first series of driver pins of various lengths slidably received in the bores; a lock-core casing movably supporting the lock-core, the interface between the lock-core and the lock-core casing defining a planar surface; a first series of spring-supported key pins seated in a series of bores coaxially with the said driver pins so that normally at least some of the key pins extend beyond the planar surface, being in contact and adapted to push the driver pins to project into the key slot each by a different extent according to the respective lengths thereof, thereby preventing movement of the lock-core relative to the lock-core casing; a key comprising on a first side a first series of teeth and notches for engaging the first series of driver pins, the key being configured so that when inserted into the key slot in a first orientation, the driver pin ends contacting the key pins become flushed with the planar surface to allow said movement of the lock-core to a core locked position, and the key comprising a second series of teeth and notches on an opposed side of the key and configured and shaped differently than the first series of teeth and notches, and further configured such that when the key is inserted into the key slot in an inverted orientation, the second series of teeth and notches engage the first series of driver pins to allow movement of the lock-core to an unlocked position, the first series of teeth and notches being incapable of releasing the lock-core to move from the locked position to the unlocked position; and wherein said movement is a sliding movement.