13-09-2012 дата публикации
Номер: US20120229251A1
An electro-mechanical lock for cargo containers or similar enclosed spaces such as storage units. The locking mechanism includes a dual-ratcheting mechanism, which is normally in the locked position, and which firmly secures doors of a container or other enclosure. To unlock the device, the user obtains a temporary access code and unlocks the device, either by a wireless interface or by, for example, a key pad. The device incorporates a rolling access code algorithm that changes the access code based upon a pre-defined customer selected time period during which the code is valid. Once the validity period expires the user must obtain a new access code from a secure access code source to unlock the device. When access is desired, the user contacts a remote secure access code source, which provides the access code for the associated lock and time period. 1. A method of unlocking a lock , comprising;providing a lock that is actuated to an unlocked position by entry of an access code into a processor that causes the lock to actuate to an unlocked state, wherein the processor generates on a periodic basis changes in the access code that is required to be entered into the processor to actuate the lock to an unlocked state;generating the access code that is then current to actuate the lock to an unlocked state at a location that is remote from the lock;providing the access code to a user; andthe user providing the access code to the lock to actuate the lock to an unlocked state.2. The method of unlocking a lock as described in claim 1 , wherein the lock comprises a real time clock claim 1 , and the real time clock provides time and date information to the processor for generating claim 1 , on a periodic basis claim 1 , changes in the access code.3. The method of unlocking a lock as described in claim 1 , wherein the lock has a unique serial number claim 1 , and wherein the access code that is then current is a mathematical function of the serial number of the lock and a ...
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