Patent ID: 7588107
Filing Date: 2009-09-15
Classification: B60P,B62D

Abstract:
1. A self propelled trailer for moving independently of a towing vehicle, comprising: a trailer body for supporting, transporting and launching a load, said trailer comprising a frame with a left and a right frame members and a first and second side members; one or more tracked propulsion units mounted to said trailer frame approximately at the center of gravity of the trailer when loaded with said load; a steering means; and wherein said tracked propulsion units are configured to move from a travel position to a working position, wherein said tracked propulsion units are positioned beneath of said trailer body when in said travel position, when in said working position, and when traveling between said travel position and said working position, with said travel position providing road clearance for towing of said trailer by a vehicle, and with said working position one in which said one or more propulsion units contacts a road surface and is configured to propel said trailer without being towed by said towing vehicle.