Tie down

DETAILED DESCRIPTION The present invention provides a tie down device to secure equipment to a trailer deck.
A preferred embodiment of the present invention has two main parts--a retractable tie down arm, which is secured to the trailer deck, and an equipment connector, which is secured to the equipment to be tied down (by welding, bolting, riveting, or some other suitable means).
In the preferred embodiment, the tie down arm has a receiving nose with an opening that is sized to receive a projection from the equipment connector.
To secure the equipment to the trailer, the equipment is placed on the trailer so that the equipment connector is next to the tie down arm (which at this point is still mostly retracted under the trailer deck).
The tie down arm is then pulled up, and the opening on the nose of the arm is slid over a projection on the equipment connector.
A locking pin is inserted through a hole in the projection to fasten the projection and arm together.
The locking pin may be replaced by a padlock or other lock in order to lock down the equipment to the trailer.