Shipping container active lock release failsafe
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United States of America Patent
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-
Sep 20, 2011
Grant Date -
Dec 30, 2010
app pub date -
Jun 28, 2010
filing date -
Jun 26, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A lock mechanism to lock at least one door of a container in a closed position includes a housing enclosing at least a portion of the lock mechanism, and a lock circuit at least partially enclosed within the housing. The lock circuit includes a main power supply, a backup power supply, a plurality of subsystems, and a lock controller coupled to the main power supply and the backup power supply. The lock controller is configured to receive commands related to operation of the lock mechanism, determine a battery level remaining in the main power supply, determine if the remaining battery level is below a threshold level, and cause the lock circuit to enter a lower power mode upon determining that the remaining battery level is below the threshold level. When in the lower power mode, at least a portion of the subsystems of the lock circuit are not powered, the lock controller receives power from the main power supply, and the lock controller monitors an interface to detect a command to unlock the lock mechanism.
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