US Patent 7926832 Trailer coupler and safety chain apparatus and system

A new and improved trailer coupler for connecting a trailer to a ball hitch mounted on a towing vehicle comprising a housing having a recessed socket, a retractable latching plate, a locking mechanism, an access port, a visual indicator, an alarm system for indicating coupling and decoupling, and a mechanical means to assist an operator to remotely attach and remove safety chains generally used in conjunction with trailers without need for the operator to climb into the truck bed.