| 摘要 |
A receiver lock for a trailer box hitch designed to secure a ball mount in place and protect it from unauthorized removal. The receiver lock consists of a solid metallic cylindrical pin (20) with a head (28) on one end and round end (40) on the other end. The pin includes a body (22) with a notched recess (32) essentially adjacent to the head with a bore (38) running through the head and body communicating with the recess. A cam lobe (42) is located within the recess and has a shape that conforms to the body when in an unlocked position, and extends above the body when locked. A circular keyway lock (48) is placed in the bore in the head and held captive with a set screw (50). A hexagonal lock connecting rod (56) joins the cam lobe to the lock through the bore. The invention functions by using the principle that when the lock is in the unlocked position the cam lobe is flush with the outside surface of the pin and insertable in the existing holes through both the box hitch and ball mount, and when in a locked position the cam is extended above the pin interfacing with the inside wall of the ball mount, thereby denying removal of the receiver lock and correspondingly the ball mount from the hitch.
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