Abstract: A lock for securing a hitch coupler and safety chain hooks, the hitch coupler being attached to a trailer's towing tongue and the safety chains and hooks being attached to the towing tongue, the lock incorporating a primary lock including an enclosure having a floor and a ceiling; a bolt attached to and extending into the enclosure from the floor; a seam segmenting the enclosure and facilitating movements of the ceiling between a first and second positions, wherein, upon movement of the ceiling to the first position, the ceiling overlies the bolt, and upon movement toward the second position, the ceiling displaces from the first position; a releasable latch attached to the primary lock, the releasable latch being adapted for resisting movements of the ceiling; and a secondary lock incorporating a hitch coupler lower surface and the chain hook receiving eye.

Abstract: A lock for securing a hitch coupler and safety chain hooks, the hitch coupler being attached to a trailer's towing tongue and the safety chains and hooks being attached to the towing tongue, the lock incorporating a primary lock including an enclosure having a floor and a ceiling; a bolt attached to and extending into the enclosure from the floor; a seam segmenting the enclosure and facilitating movements of the ceiling between a first and second positions, wherein, upon movement of the ceiling to the first position, the ceiling overlies the bolt, and upon movement toward the second position, the ceiling displaces from the first position; a releasable latch attached to the primary lock, the releasable latch being adapted for resisting movements of the ceiling; and a secondary lock incorporating a hitch coupler lower surface and the chain hook receiving eye.

Abstract: A trailer hitch coupler guard including a trailer hitch coupler receiving member; a trailer hitch coupler covering member; an extraction stopping lug attached to and extending upwardly from the trailer hitch coupler receiving member; a hinge interconnecting the trailer hitch coupler receiving member and the trailer hitch coupler covering member, the hinge facilitating movement of the trailer hitch coupler covering member between opened and closed positions, the trailer hitch coupler covering member overlying the trailer hitch coupler receiving member upon movement to the closed position, and being displaced away from the closed position upon movement to the opened position; and a pair of eyed flanges fixedly attached to one of the members among the trailer hitch coupler receiving member and the trailer coupler covering member; the flanges' eyes being positioned for alignment with each other.

Abstract: An energy absorbing security door bar system is disclosed. The system includes a generally straight elongate member having oppositely facing free ends and the ability to resiliently flex from a straight resting position to a bowed position in which straight lines drawn through the free ends of the elongate member form an included angle of less than about 170 degrees. In addition, the system includes anchoring means for releaseably anchoring the free ends of the elongate member to opposite sides of a door's frame to prevent the door from being opened. A method for preventing forced entry through a door secured with the above security door bar system is also disclosed.