Abstract: A concrete breaking apparatus includes a wheeled support assembly having an open end to accommodate the variable positioning of an impact roller therebetween and a closed end opposite the open end. A frame having opposing longitudinal arms connected near one end so as to define open and closed end portions is pivotably supported by the wheeled support assembly on pivot arms which connect the frame to the wheeled support assembly. An impact roller is fixedly interposed for rotation between the opposing longitudinal arms of the frame near the open end portion thereof. The impact roller has opposing ends, an axis of rotation through the opposing ends, and a surface equipped with spaced apart primary and secondary impact members traversing the opposing ends of the roller.

Abstract: A wheeled support structure reversibly deployable from a stowed condition on the bed of a trailer to aid in rolling support of a load thereupon is provided. The support structure includes a frame, pivotable through a range of motion exceeding 90 degrees and having forward and rearward portions, and an actuator assembly capable of reversibly deploying the frame from a stowed condition on the bed of the trailer. The rearward frame portion includes a tag axle assembly and means for limiting energy transfer from the tag axle assembly to the frame as when the wheeled support structure is deployed to aid in rolling support of a load being hauled by the trailer. The actuator assembly cooperatively links the trailer to the forward portion of the frame.