Patent ID: 7712763

Claim:
A trailer hitch ball receiver security lock device comprising: a lock collar welded onto a top of a trailer hitch ball receiver, the lock collar comprising a hardened steel cylinder having a top cylindrical opening through a vertical centerline of the collar for receiving a cylinder lock therein with the cylinder lock fully inserted in the top cylindrical opening and the cylinder lock freely rotatable within the top cylindrical opening, and the lock collar having a bottom cylindrical opening through the vertical centerline of the collar communicating with the top cylindrical opening, the lock collar centrally positioned over a top center hole through a top of the ball receiver; a lock ball component inserted up into the ball receiver, the lock ball component comprising a hardened steel sphere spinning freely around a vertical centerline within the ball receiver, a lock shaft extending upwardly from the hardened steel sphere through the top opening of the ball receiving into the two cylindrical openings of the lock collar; a cylinder lock inserted downwardly into the top cylindrical opening and over the lock shaft to lock onto the lock shaft, so that the cylinder lock fits completely within the top cylindrical opening so that the cylinder lock cannot be pried out of the top cylindrical opening and a top key receiving opening of the cylinder lock facing upwardly to enable locking and unlocking of the cylinder lock; the steel sphere, the lock shaft and the cylinder lock all locked together to retain the steel sphere within the ball receiver to prevent the ball receiver from being mounted on a trailer hitch ball to prevent a theft of the trailer by towing on a conventional trailer hitch ball; the steel sphere, the lock shaft, and the cylinder lock all spinning freely about a center vertical axis within the ball receiving and the lock collar to prevent drilling of the cylinder lock for security, thereby providing a trailer hitch ball receiver security lock.