US Patent 9102344 Jack and dolly assembly and system

A jack and dolly assembly and system including a shaft defining a longitudinal axis extending along the shaft and an interior hollow; a reversible drive mechanism at least partially positioned in the interior hollow of the shaft; a proximal arm removably securable to the shaft and substantially perpendicular to the longitudinal axis; a distal arm removably securable to the drive mechanism, the distal arm being spaced from and substantially parallel to the proximal arm; wherein the reversible drive mechanism is operable to move the distal arm along the shaft.