Patent ID: 8347659

Claim:
A lock mechanism for locking at least one door of a container in a closed position, the lock mechanism comprising: a housing; at least one lock member at least partially enclosed within the housing, the at least one lock member comprising a first latch hook configured to engage a latch assembly bar on an exterior of the at least one door to lock the at least one door of the container in a closed position, wherein the lock member is removable from the at least one door; a latching mechanism coupled to the at least one lock member, the latching mechanism comprising: a fluid chamber configured to hold a fluid, a piston slidably housed within the fluid chamber, and a valve coupled to the fluid chamber and configured to be in one of two states, the two states including an open state where fluid can flow through the valve in two directions to allow the piston to be moved in two directions, and a closed state where fluid is inhibited from flowing through the valve in at least one direction to prevent the piston from moving in at least one direction; and a lock circuit at least partially enclosed within the housing, the lock circuit comprising: memory, and a lock controller coupled to the memory and the latching mechanism and configured to receive commands related to the operation of the lock mechanism, wherein the lock controller is configured to cause the latching mechanism to be in one of the two states in response to the received commands.