| 摘要 |
An unlatching tool to uncouple the trailer from the tractor of semi-trailer truck rigs, comprising a foldable elongated bar having a hand grasp at one end and a combination safety release arm plus unlatching hook at the opposite working end. The safety release arm extends at a right angle from the working end of the bar and in one direction from the bar, while the unlatching hook extends outwardly from the bar in the opposite direction and set back from the working end a short distance. When the unlatching hook engages the coupling latch which locks the king pin of the trailer to the tractor, the safety release arm extends forward of the unlatching hook just far enough to bear against the safety release mechanism which can be moved to the safety release position by a partial rotation or twist of the bar while at the same time pulling on the bar to draw the coupling latch to the unlatched position. The trailer can then be uncoupled from the tractor. The previous way of unlatching the coupling mechanism was to reach under the trailer to grasp the latch by hand, and at the same time try to hold the safety in the release position. The elongated bar is pivoted in the center so it can be folded to a convenient length for drivers to carry with them as a personal item for use with whatever rig they may be assigned to drive.
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