| 摘要 |
A trailer comprising a lower main deck and an upper deck positioned forwardly and upwardly of the main deck and including an upper deck ramp positioned at the forward end of the main deck which may be pivotally moved upwardly so that freight or equipment may be moved upwardly thereon from the main deck to the upper deck. Pivotally connected upper and lower scissor arms are provided at the opposite sides of the forward end of the upper deck ramp. A hydraulic cylinder is connected to each of the lower scissor arms adjacent the upper end thereof. The upper end of each of the upper scissor arms is connected to the forward end of the upper deck ramp with the lower end of the lower scissor arms being pivotally connected to the trailer frame. Extension of the hydraulic cylinders causes the scissor arms to spread apart to raise the upper deck ramp from a stored position to an inclined position. When the upper deck ramp is in its inclined position, the weight of the load on the upper deck ramp is carried by the scissor arms and is not carried by the hydraulic cylinders.
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