Patent ID: 7665755

Claim:
An improved kingpin locking system for the kingpin of a trailer comprising: a kingpin lock body having a lower section having a base wall and an inverted truncated generally pyramidal shape including at least one angled side extending upwards and outwards at an angle between 25° and 70° from vertical, and an upper section having a truncated generally pyramidal shape including a top wall and at least one angled side extending downwards and outwards from said top wall at an angle between 25° and 70°, said lower section having a height greater than the height of said upper section; a central kingpin-receiving chamber formed in said kingpin lock body, said kingpin-receiving chamber being generally cylindrical in shape and extending downwards from said top wall into said kingpin lock body; a kingpin engagement bar movably mounted in said kingpin lock body adjacent said kingpin-receiving chamber, said kingpin engagement bar movable between an engagement position extending into said kingpin-receiving chamber and a release position withdrawn from said kingpin-receiving chamber; and kingpin engagement bar locking means operatively associated with said kingpin engagement bar for releasably securing said kingpin engagement bar in said engagement position thereby releasably securing said kingpin lock body on a kingpin to prevent unauthorized engagement of the kingpin and thereby preventing unauthorized use of the trailer.