Patent ID: 8345813

Claim:
An apparatus for translating a payload comprising: a body for supporting the payload, the body comprising a cavity for receiving the payload, the body comprising; an annular ring plate having an inner surface forming the cavity about an axis for receiving the payload; an upper plate having an opening, the upper plate connected to a top end of the annular ring plate and extending radially outward from the annular ring plate; and a lower plate having an opening, the lower plate connected to a bottom end of the annular ring plate and extending radially outward from the annular ring plate; the openings of the upper and lower plates in axial alignment with the cavity and each other; and a plurality of support members for supporting the payload, the support members extending radially inward into the cavity; a plurality of rollers movable between a retracted position and an extended position, the plurality of rollers located radially outside of the cavity; wherein when the rollers are in the extended position, the rollers contact a ground surface and the body does not contact the ground surface; and wherein when the rollers are in the retracted position, the rollers do not contact a ground surface and the body contacts the ground surface.