Tractor trailer jacknife prevention system
 A system operated by the driver of a tractor trailer for preventing the jackknifing of the tractor trailer, the tractor trailer being of the type having a kingpin under the trailer to lock into the fifth wheel mounting plate on the tractor, the system having structure for locking the trailer to the tractor to prevent the trailer's turning in relation to the tractor, with the structure for locking the trailer in a fixed position being activated by the driver when the driver senses that the trailer is starting to jackknife. 
B
B62D
inventional
Theodore R. Benvinda
Brown Brown