Patent ID: 7306244

Claim:
The transportation device for transporting a load, comprising: an outer frame operative to move along an external surface; an inner frame removably mounted to the outer frame so that the outer and inner frames are operative to move relative to one another transversely to the surface; a receptacle coupled to the inner and outer frames and operative to move with the inner frame in response to a mass of the load carried by the receptacle, wherein the outer and inner frame are configured to minimize at least a torsion force produced by the load during transportation, loading and unloading of the receptacle; the outer frame being provided with spaced apart first and second elongated sections extending at least in part along upper and lower substantially planes, respectively; a third section extending substantially vertically between the first and second sections; and the first section provided with an opening configured to receive the receptacle, the third section being provided with a plurality of spaced apart guiding surfaces configured to slidably guide the inner frame between the first and second sections of the outer frame upon receiving and removing the load in and from the receptacle.