Locks – Special application – For control and machine elements
Patent
1985-12-04
1987-10-06
Wolfe, Robert L.
Locks
Special application
For control and machine elements
70361, 70371, 70389, 70454, F16B 4100
Patent
active
046974440
ABSTRACT:
A security device is disclosed which mounts to a king pin of a trailer to prevent unauthorized coupling of the trailer to a tractor. The security device includes a locking device which functions as a deadbolt. Within the locking device are contained a key actuated lock cylinder, a cam actuator and bearing balls which are moved by the actuator to lock the locking device in place and thereby lock the security device to the king pin. The exterior end of the locking device has a small 90.degree. opening through which the key for the locking cylinder is inserted and which permits limited rotation of the key for locking and unlocking the lock cylinder while preventing withdrawal of the key except when the lock cylinder is locked. This provides a positive indication as to whether the locking device is locked or not. The locking device includes structure which permits the lock cylinder to be removed only when the security device is not mounted to a king pin, so that the lock cylinder cannot be removed from the security device by unauthorized personnel when the security device is mounted to a king pin. The locking device also includes structure which permits any one of a number of existing standard lock cylinders to be used.
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Gall Lloyd A.
Wolfe Robert L.
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