| 摘要 |
A fifth wheel coupler apparatus adapted for use with a tractor vehicle for hauling a semi-trailer vehicle including a pair of trackways carried by the tractor vehicle and a carriage assembly supported for riding movement on the trackways. A fifth wheel is mounted on the carriage assembly adapted for coupling the trailer vehicle to the front end of the semi-trailer vehicle. The trackways are inclined in a generally upwardly and rearwardly direction with respect to the horizontal or normal direction of movement of the tractor vehicle enabling the carriage assembly, and thus, the front end of the trailer vehicle to be elevated upon relative movement of the tractor vehicle with respect to the semi-trailer vehicle. A locking unit is provided to hold the carriage assembly in the raised position while the semi-trailer vehicle is transported from one location to another.
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