| 摘要 |
A dolly is disclosed for a semi-trailer that has a compromised structure due to a load shift or an accident. The semi-trailer dolly can also be used to extricate a semi-trailer stuck under a bridge without damaging the wheels or tires of the semi-trailer. In accordance with an important aspect of the present invention, the dolly is configured to provide transverse support of a semi-trailer in an area between the rear axles of the semi-trailer and the front of the semi-trailer. More particularly, the dolly is configured to provide a uniform transverse lifting force to a semi-trailer in an area between the rear axles of a semi-trailer and the front of a semi-trailer where a structural failure of the semi-trailer is likely to occur. The semi-trailer dolly includes a removable saddle and a wheeled cart that includes lifting mechanisms. The removable saddle can be removed from the wheeled cart and positioned under the trailer. Tow truck boom winches connected to opposite sides of the saddle can then be used to lift the saddle and thus the trailer to enable the wheeled cart to be put in position under the saddle. Once the wheeled cart is positioned under the saddle, adjustable lifting mechanisms on the wheeled cart enable the height of the saddle to be varied. The lifting mechanisms are then used to level the floor of the semi-trailer and provide support for the floor of the semi-trailer 24 so that the breached semi-trailer can be transported by a tractor. The wheeled cart may include self steering wheels which facilitate transport of the breached semi-trailer by a tractor.
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