초록 ▼

An improved wheeled luggage case having a pair of freely rotating large wheels that have a diameter substantially greater than the height of the center of gravity of the wheeled luggage case itself (when in an upright, at rest position). The weight of the wheeled luggage case is largely transferred

An improved wheeled luggage case having a pair of freely rotating large wheels that have a diameter substantially greater than the height of the center of gravity of the wheeled luggage case itself (when in an upright, at rest position). The weight of the wheeled luggage case is largely transferred to the large wheel pair when being towed, reducing the load burden on a user and making it easier to pull the wheeled luggage case over long distances, for example, between airport terminals.

대표청구항 ▼

1. 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 rotatio

1. 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; anda 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; andwhen 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. 2. The wheeled luggage case of claim 1, wherein said pair of large wheels comprise at least a pair of freely-rotating wheels, each provided with a wheel cover. 3. The wheeled luggage case of claim 2, wherein said pair of large wheels is made from material for facilitating optimal roiling contact with a floor surface. 4. The wheeled luggage case of claim 3, wherein said material comprises rubber/silicone to enable rolling movement over a variety of surfaces and grading and under adverse environmental conditions. 5. The wheeled luggage case of claim 4, wherein said variety of surfaces and grading comprises at least one selected from the group: paved brick surfaces, paved stone surfaces, gravelly surfaces, rocky surfaces, irregular surfaces, curved surfaces, inclined surfaces, curbing, stairways and any combination thereof. 6. The wheeled luggage case of claim 1, wherein said small wheels are in rolling contact with an inner rim defining the circumference of said pair of large wheels. 7. The wheeled luggage case of claim 1, wherein said immobilizing means comprises a foot-member fixedly formed on an edge of said base for immobilizing said wheeled luggage case when placed in an upright position. 8. The wheeled luggage case of claim 1, wherein said means for immobilizing said wheeled luggage case comprises said base when brought into contact with a ground surface by tilting said luggage case into an upright rest position, said base being integrally formed with said storage chamber. 9. The wheeled luggage case of claim 1, wherein said cover defines an opening on said at least one side of said storage chamber for providing secure and safe storage access to only a portion of an interior section thereof. 10. The wheeled luggage case of claim 9, wherein said interior section portion comprises at least one pocket formed within a section of said luggage case proximate to an outer opening thereof. 11. The wheeled luggage case of claim 9, wherein said storage access accommodates a portable device. 12. The wheeled luggage case of claim 11, wherein said portable device comprises a laptop computer. 13. A wheeled luggage case system comprising: a storage chamber formed with a base and having a secure space for holding and transporting moveable goods;a cover defining an opening on at least one side of said storage chamber for providing ready access to all portions 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; anda means for towing of said wheeled luggage case;wherein, when said storage chamber is closed with said cover and said wheeled luggage case is tilted at an angle to a ground surface by action of said towing means, said immobilizing means and base are lifted away from contact with said ground surface allowing rotation of said pair of large wheels on each of their respective said set of small wheels, said large wheels bearing most of the weight of said wheeled luggage case, the weight being distributed among said set of small wheels, relieving said weight load on a user; andwhen said storage chamber is tilted into an upright rest position in relation to a ground surface, said immobilizing means and base are put into full contact with said ground surface to restrain rotation of said, pair of large wheels and said wheeled luggage case is maintained in an immobile rest position.