Patent ID: 8118146

Claim:
A wheeled luggage case comprising: a storage chamber formed with a base; a cover defining an opening on at least one side of said storage chamber for providing ready access therein; a pair of freely rotating large wheels mounted on opposite sides of said luggage case having a common axis of rotation therebetween, said large wheels each having a diameter at least one third the height of said storage chamber; a set of small, freely rotatable wheels mounted on each side of said luggage case in spaced apart fashion along the circumference of each of said pair of large wheels, each of said set of small wheels supporting one of said pair of large wheels by rolling contact with the circumference of said pair of large wheels; a means for immobilizing said wheeled luggage case; and a means for towing of said wheeled luggage case; wherein said luggage case has its center of gravity in a region proximate said common axis of rotation, and wherein said pair of large wheels provides support for said luggage case, bearing most of the weight load of said luggage case when towed by a user, such that when said storage chamber is tilted into an upright rest position, said immobilizing means and base are put into full contact with a ground surface, said pair of large wheels being lifted above said ground surface, such that said wheeled luggage case is maintained in an immobile rest position; and when said wheeled luggage case is tilted at an angle to said ground surface by action of said towing means, said immobilizing means and base are lifted away from contact with said ground surface, thereby restoring said pair of large wheels in contact with said ground surface, to allow rotation of said pair of large wheels on each of their respective said set of small wheels.