Abstract: A door lock system for enclosures is provided which includes a screw drive mechanism releasably mounted on a back plate member and coupled via threads to a threaded locking member to linearly drive the locking member to engage with a receptor on an enclosure frame to lock the enclosure. A controller unit has an integrated circuit configured to control the operation of the screw drive mechanism and report the status of the door to a central location. A position switch is used to indicate whether the door is open or closed so that the controller unit can automatically engage the screw drive mechanism to lock the door after a preset time delay. A keypad allows a user to enter a code to unlock the door. A radio in the controller unit permits wireless communication to report status and to allow central command control over the doors.

Abstract: The door lock system for trailers and cargo containers comprises a linear actuator releasably mounted on a back plate member to slidably engage a sliding bolt with a receptor on a tubular frame member of the trailer or cargo container to prevent the opening of the trailer or cargo container doors. A controller unit has an integrated circuit configured to control the operation of the linear actuator and report the status of the door to a central location. A position switch is used to indicate whether the door is open or closed so that the controller unit can automatically engage the locking mechanism to lock the door as soon as it is closed. A keypad allows a user to enter a code to unlock the door. A radio in the controller unit permits wireless communication to report status and to allow central command control over the doors.