Patent ID: 8636624

Claim:
A device comprising a cylindrical ring assembly comprising a central axis and an inner diameter that is substantially smooth with holes for accepting a fastening mechanism; the cylindrical ring assembly further comprising a first side of a larger diameter than a second side so that the larger diameter first side fits firmly on top of the second side creating an integrated single unit; the first and second sides each comprising an annular lip extending perpendicular to an outer surface of the cylindrical ring assembly; a first and second outer annular gear wheel of a larger diameter than the cylindrical ring assembly adjacent to the outer surface of the cylindrical ring assembly and held in position by the annular lips of the first and second sides; the first and second annular gear wheels comprising a plurality of teeth facing inward across the outer surface of the cylindrical ring assembly; and, a plurality of drive gear mechanisms with a plurality of gear teeth capable of engaging the first and second outer annular gear wheels where the gears turn in unison when either the first or second outer gear wheel is rotated.