| CPC B62D 59/04 (2013.01) [B60G 11/185 (2013.01); B60K 17/02 (2013.01); B60K 17/046 (2013.01); B60K 17/14 (2013.01); B60K 17/22 (2013.01); B60K 17/30 (2013.01); B60K 17/356 (2013.01); B60K 17/358 (2013.01); B60P 1/44 (2013.01); B66F 9/0655 (2013.01); B60G 11/183 (2013.01); B60G 2200/22 (2013.01); B60G 2202/134 (2013.01); B60G 2202/1362 (2013.01); F16D 11/14 (2013.01)] | 10 Claims |

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1. A trailer for towing by a power vehicle, comprising:
a frame forming an undercarriage chassis; and
a storage bin and an extension device connected to the frame and the storage bin to move the storage bin away from the frame, the storage bin includes a platform extending substantially parallel with the frame; and
a tandem wheel assembly positioned under the undercarriage chassis and having a rear wheel assembly and a front wheel assembly; and
an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis, the extension device includes a first extension section rotatably connected the frame and a second extension section rotatably connected to the first extension section, and a storage bin platform section connected to the second extension section, the second extension section is expandable and includes a boom support, a sliding support received by the boom support, a sliding mechanism moving expanding the sliding support from the boom support.
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