Locks – Special application – For automotive vehicles
Patent
1998-08-04
2000-04-18
Barrett, Suzanne Dino
Locks
Special application
For automotive vehicles
70275, 292144, 292DIG32, B60R 2500
Patent
active
060501162
ABSTRACT:
A method and apparatus is provided for securing trailer doors against tampering. In one exemplary embodiment, a locking device is mounted on the inside of a trailer door. The device includes a locking bolt which is selectively operated by a pneumatic valve in response to a signal selectively generated by an operator. In the example, the locking device is normally in a locked position and the locking bolt is effective to secure the trailer doors to the frame of the trailer. An operator selectively causes the generation of an "unlock" signal through the use of a wireless control device. The unlock signal, in turn, operates upon an electro-pneumatic valve device to effect an application of locally available high air pressure to a locking bolt actuator assembly. The air pressure is sufficiently high to effect the movement of a relatively heavy locking bolt out of a locking position, at which time the trailer doors may be opened for access to the trailer load. In the example, the application of the air pressure is for a predetermined time period after which the air pressure is removed and the locking bolt is returned to a locking position.
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Barrett Suzanne Dino
Load Defender Incorporated
Wilder Robert V.
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