US Patent 7243615 Dual-control dog collar

An adjustable dog collar having two attachment points permits the collar diameter to be regulated from a distance. The collar is constructed of a single piece of belting which is looped over an upper center bar of a three-bar cinch. The belting then passes under one of the cinch side bars, encircles the dog's neck, and terminates at the other side bar. The attachment points are located at a control ring located on the end of the belting loop and at another fixed location along the collar. Force is applied to these attachment points by connected leashes which either loosen, tighten, or hold constant the dimension of the collar depending upon the relative amount of force applied to each leash.