Patent ID: 7931108
Filing Date: 2011-04-26
Classification: B60S,B62D

Abstract:
1. An apparatus for repositioning a semi-trailer, comprising: two hydraulic jack arms, each comprising a hydraulic cylinder containing a movable piston; an upper frame attached to an underside area of the semi-trailer, wherein the hydraulic jack arms are pivotally attached to the upper frame, further wherein the hydraulic jack arms are disposed substantially parallel to the upper frame and are disposed to be pivoted away from the upper frame to a position substantially perpendicular to the upper frame; two opposing wheels, each coupled to a wheel housing, wherein each wheel is operatively coupled to a motor; a lower frame with opposing ends, with each of the ends attached to one of the wheel housings, the lower frame being mounted to the movable pistons of the hydraulic jack arms; wherein, lowering the hydraulic jack arms can hydraulically lift the semi-trailer, and further wherein the wheels can maneuver the semi-trailer.