Ratchet-type expansion system for luggage and luggage incorporating same

1. An article of luggage comprising:

a luggage main body having a bottom surface and a cavity formed to receive articles for packing;

an expansion body having a perimeter defining a cavity;

a foldable gusset joining the luggage main body to the expansion body, the foldable gusset allowing the expansion body to move away and towards the luggage main body to vary a size of a volume formed by the cavity of the luggage main body and the cavity of the expansion body;

an openable cover attached to the expansion body; and

an expansion and locking device disposed internally at opposite ends of the article of luggage, the expansion and locking device being configured to allow free movement of the expansion body in a compression direction towards the luggage main body and configured to allow locking movement of the expansion body in an expanding direction away from the luggage main body, wherein the expansion and locking device is a ratcheting assembly comprising:

a sliding assembly having a set of parallel teeth, the sliding assembly affixed to one of the luggage main body and the expansion body; and

a holding assembly main body affixed to the other of the luggage main body and the expansion body and affixed in line with the sliding member,

wherein the holding assembly main body comprises:

a receiving pocket into which the sliding assembly is insertable,

wherein the receiving pocket is defined by: a proximal wall affixed to said one of the luggage main body and the expansion body; a distal wall substantially parallel to the proximal wall; and a pair of side walls connecting the proximal wall and the distal wall; and

wherein an opening is defined through the distal wall of the receiving pocket, and

a latch structure pivotably coupled to the distal wall of the receiving pocket by a biasing member, the latch structure having disposed on its underside a pawl, the latch structure having a planar surface,

wherein the latch structure comprises a first configuration in which the latch structure is biased by the biasing member; and when the latch structure is in the first configuration, the latch structure is disposed in the opening of the distal wall the sliding assembly is inserted into the receiving pocket to allow engagement between the pawl and the set of parallel teeth through the opening of the distal wall, and the planar surface of the latch structure is substantially parallel to the distal wall of the receiving pocket; and

wherein the latch structure comprises a second configuration in which the latch structure is pivoted by a force that is substantially perpendicular to the planar surface of the latch structure a against the biasing member; and when the latch structure is in the second configuration, the pawl is pivoted away from the set of parallel teeth to release the engagement between the pawl and the set of parallel teeth, and the planar surface of the latch structure is angular with respect to the distal wall of the receiving pocket.

2. The article of luggage as in claim 1 , wherein the latch structure further comprises a finger holder for allowing a user to apply the force that is substantially perpendicular to the planar surface of the latch structure.

3. The article of luggage as in claim 1 ,

wherein the sliding assembly comprises an elongated plate and the set of parallel teeth extend from the elongated plate; and

wherein the set of parallel teeth each have an undersurface substantially perpendicular to the elongated plate and a slanted surface continuous with the undersurface.