Security device for trailer

A security device lockable to a vehicle coupling pin for preventing unauthorized use of the vehicle to which the coupling pin is attached, the security device comprising a body having a cavity configured therein to receive a coupling pin, a first hole in the body communicating with the cavity and with the exterior of the body, and a locking device comprising an enclosure which is slidably disposed in the first hole, the enclosure having a cavity, a key actuated lock cylinder having a locked condition and an unlocked condition disposed in the cavity of the enclosure, the enclosure having a first opening thereto in a first end thereof facing the exterior of the body and the lock cylinder having a first end facing the exterior of the body, the first end of the lock cylinder having an entrance thereto for receiving a key therein by means of which the lock cylinder is actuable to its locked and unlocked conditions, the first end of the enclosure being configured to cover a substantial portion of the first end of the lock cylinder and the first opening to the enclosure being configured so as to permit limited rotation of a key inserted therethrough into the lock cylinder, the lock cylinder being constructed so as to be actuated to its locked and unlocked conditions by the limited rotation of the key, and the lock cylinder being further constructed so as to prevent withdrawal of the key therefrom in the unlocked condition thereof within the limited rotation of the key permitted by the enclosure first opening, the enclosure including a removable closure for its second end and means cooperating with the removable closure to receive it and close the enclosure second end to prevent removal of the lock cylinder therefrom, the receiving means being located and the closure being configured so that the closure may be removed only in the unlocked condition of the lock cylinder when the coupling pin is not disposed in the cavity, and means coupled to the lock cylinder and actuable thereby enabling slidable movement of the enclosure in the first hole between a locking position in which the enclosure or means attached thereto or forming part thereof is positioned to engage a coupling pin disposed in the cavity and prevent separation of the body from the coupling pin when the lock cylinder is in its locked condition and an unlocking position in which the enclosure is positioned to permit relative movement of the body and the coupling pin when the lock cylinder is in its unlocked condition.

A locking device for a security device lockable to a vehicle coupling pin for preventing unauthorized use of the vehicle to which the coupling pin is attached, the security device comprising a body having a cavity therein configured to receive a coupling pin, a first hole in the body communicating with the cavity and the exterior of the body, and a locking device comprising an enclosure which is slidably disposed in the first hole for movement between a locking position and an unlocking position, the enclosure having a cavity, a key actuated lock cylinder having a locked condition and an unlocked condition disposed in the cavity of the enclosure, the enclosure having a first opening thereto at one end thereof and a second opening thereto at an opposite end thereof, the lock cylinder and the first and second openings being configured so that the lock cylinder is removable from the enclosure only through the second opening, the first opening being sized to permit the key to be passed therethrough into the lock cylinder by means of which the lock cylinder is actuable to its locked and unlocked conditions, a hollow sleeve removably disposed in the enclosure, the enclosure being configured so that the sleeve is received therein and fixed against rotation relative thereto, the sleeve having an inner configuration for receiving the lock cylinder, and means coupled to the lock cylinder movable between a locking position substantially protruding from the enclosure in the locked condition of the lock cylinder for engaging the body and thereby locking the enclosure in a locking position thereof, and an unlocking position substantially within the enclosure in the unlocked condition of the lock cylinder permitting slidable movement of the enclosure relative to the body.