HITCH COMBINATION FOR PREVENTING THE COUPLING OF TWO VEHICLES HAVING MISMATCHING VEHICLE CHARACTERISTICS

摘要

A hitch combination which includes a hitch constituting a part of one vehicle and a coupler constituting a part of another vehicle. The one vehicle includes a first key device which is correlated to a certain characteristic of the vehicle. The other vehicle includes a second key device which is correlated to a certain characteristic of the other vehicle. The key devices of the vehicles have interfering parts which serve to prevent securement of the coupler to the hitch when there is a mismatch of vehicle characteristics. When there is a match of vehicle characteristics, the key devices of the vehicles cooperate so as to permit the securement of the coupler to the hitch.