Security system for cargo trailers
First Claim
1. A method of operating a security system for a cargo container including a cargo door, a latch, and an electronic controller configured to control movement of the latch, the method comprising:
- monitoring the cargo door to detect a change in the cargo door'"'"'s position;
monitoring the latch to detect a change in the latch'"'"'s position;
determining whether the latch or the cargo door changed position;
determining whether user input regarding the position of the cargo door or the latch is received within a predetermined time period; and
moving the latch to a first position in response to either the latch or the door changing position and a failure to receive user input, within a predetermined time period, regarding the position of the cargo door or the latch.
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Accused Products
Abstract
A cargo transportation device has a container including a cargo door accessible from the outside for closing the container and being movable from an open position to a closed position. A security system is provided that includes a latching device on the inside of the container, the latching device having a latch, a screw for moving the latch between an open position and a closed position, and a rotary motor for turning the screw. The security system has a latch receiving device, adapted to receive the latch, on the inside of the container. A controller operates a motor to turn a screw in one direction and thereby moves the latch from its unlocked position to its locked position. The controller also can operate the motor to turn the screw in the direction opposite of said one direction thereby moving the latch from its locked position in the latch receiving device to its unlocked position.
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Citations
20 Claims
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1. A method of operating a security system for a cargo container including a cargo door, a latch, and an electronic controller configured to control movement of the latch, the method comprising:
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monitoring the cargo door to detect a change in the cargo door'"'"'s position;
monitoring the latch to detect a change in the latch'"'"'s position;
determining whether the latch or the cargo door changed position;
determining whether user input regarding the position of the cargo door or the latch is received within a predetermined time period; and
moving the latch to a first position in response to either the latch or the door changing position and a failure to receive user input, within a predetermined time period, regarding the position of the cargo door or the latch. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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positioning a security system, including a latch and an electronic controller configured to move the latch, in a cargo container having a cargo door;
storing a number of permitted attempts to move the latch to a first position;
receiving a request to move the latch to the first position;
determining whether a number of previous attempts to move the latch to the first position is less than the number of permitted attempts;
attempting to move the latch to the first position if the number of previous attempts is less than the number of permitted attempts. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method comprising:
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positioning a security system, including a latch and an electronic controller configured to move the latch, in a cargo container having a cargo door;
receiving a request to move the latch to a first position;
determining whether the door is in a first state;
if the door is in the first state, then the moving the latch to the first position; and
if the door is not in the first state, then not moving the latch to the first position. - View Dependent Claims (13, 14, 15, 16)
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17. A method comprising:
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positioning a security system, including a latch and an electronic controller configured to move the latch, in a cargo container having a cargo door wherein the electronic controller is configured to move the latch to a first position in response to receipt of a signal over a first communication channel and to move the latch to a second position in response to receipt of a signal over a second communication channel;
receiving a data transmission from a key fob over a third communication channel;
preventing movement of the latch in response to receipt of a signal over the first channel or the second channel in response to receipt of the data transmission. - View Dependent Claims (18, 19, 20)
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Specification