| 摘要 |
A tractor-trailer combination has a safety stop arrangement mounted on the trailer coupler base member for limiting relative pivotal movement of the trailer and tractor by engaging in a slot provided in the fifth wheel of the tractor and stopping undesirable movement. If sufficient force is created by the relative movement of the tractor and trailer, the tractor-trailer pin coupling will part before the break point of the safety stop arrangement is reached and the trailer will be separated from the tractor in order to prevent a serious jackknifing situation.
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