A utility vehicle 10 is provided with an extended chassis 12. The presence of the resilient member makes it easy tune the system to adjust the performance of the trampoline and to minimize impacts on a jumper and thereby reduce the likelihood of bed-impact injuries. The protective cover containing at least one cavity for mounting the associated segment of the handheld device therein and at least one fitted notch to secure the piece to the associated segment. The outer coupling portion has an interior surface which is curved in the longitudinal direction, while the inner coupling portion has an exterior surface which is curved in the longitudinal direction, the surfaces of the inner and outer coupling portions being of different curvatures. The control methods for imager positioning enable decreasing the blur caused by both the motion of the moving imager or the motion of an object’s image that the imager is intended to capture. The heating element is adopted as a heating belt of a fixing device of an image forming apparatus.