Suitcase

A hard-shell suitcase comprising:

• a base portion comprising a first concave shell, wherein an edge of the first concave shell defines a first plane;
• a lid portion connected to the base portion by a hinge such that the lid portion is configured to be movable with respect to the base portion between an open position and a closed position, wherein in the closed position an edge of the lid portion is adjacent to the edge of the first concave shell in the first plane;
• first, second, third and fourth wheel assemblies attached to the exterior of the base portion, wherein:
• the first, second, third and fourth wheel assemblies are in a second plane parallel to the first plane;
• the first, second, third and fourth wheel assemblies are configured to support the base portion;
• and
• each wheel assembly is configured to rotate about a first axis parallel to the second plane and about a second axis perpendicular to the first axis;
• and
• a first retractable handle parallel to the first plane configured to be movable in a first direction parallel to the first plane from a retracted position to an extended position and from the extended position to the retracted position, wherein in the retracted position a portion of the first retractable handle is housed inside the lid portion.

A hard-shell suitcase comprising:

• a base portion comprising a first concave shell, wherein an edge of the first concave shell defines a first plane;
• a lid portion connected to the base portion by a hinge such that the lid portion is configured to be movable with respect to the base portion between an open position and a closed position, wherein in the closed position an edge of the lid portion is adjacent to the edge of the first concave shell in the first plane;
• first, second, third and fourth wheel assemblies wherein the first and second wheel assemblies are attached to the exterior of the base portion and wherein the third and fourth wheel assemblies are attached to the exterior of the lid portion, wherein:
• the first, second, third and fourth wheel assemblies are in a second plane perpendicular to the first plane;
• and
• each wheel assembly is configured to rotate about a first axis parallel to the second plane and about a second axis perpendicular to the first axis;
• first, second, third and fourth feet attached to the exterior of the base portion, wherein the first, second, third and fourth feet are in a third plane parallel to the first plane;
• and
• a first retractable handle parallel to the first plane configured to be movable in a direction parallel to the first plane between a retracted position and an extended position, wherein in the retracted position a portion of the first retractable handle is housed inside the lid portion.