Built-in safety mechanism for tractor-trailer "fifth-wheel" coupling keeps rig together in case kingpin failure. Modified coupling utilizes all standard components, such as two wear plates, kingpin, and kingpin latch. It is modified by adding semicircular lip to top wear plate, matching semicircular slot to bottom wear plate, and two latching stop mechanisms.
Extra-safe tractor-trailer coupling
NASA Tech Briefs ; 4 , 2
1979-12-01
Miscellaneous
No indication
English