| 摘要 |
<p>A trailer security device is provided comprising a coupling assembly (2) wherein a fixed coupling member (7) provides an attachment formation (10), such as a part-spherical socket, for attachmentto a towing formation, such as a part-spherical ball, on a towing bar of a motor vehicle and a keeper member (11) is movably associated with the fixed coupling member. The keeper member is movable between two positions in one of which engagement or release of the attachment formation relative to a towing formation is enabled and one in which such engagement or release is denied. A locking member is movable between an operative position in which movement of the keeper member relative to the fixed coupling member is effectively prevented with the keeper member in its operative position and an inoperative position in which such movement is enabled. Mechanical linkage means, such as a control cable, preferably connect the locking member with a wheel lock unit that serves to arrest the rotation of a wheel of the trailer when the locking member is in its inoperative position. The invention also provides an accessory for fitment to an existing trailer.</p> |
