Self-stabilized rollable luggage assembly and corresponding assembly method

1. A luggage assembly comprising:

a first piece of luggage, having a first height, the first piece of luggage comprising:

a handle configured to extend above a top portion of the first piece of luggage, to facilitate pulling the luggage assembly; and

two or more wheels at the bottom of the first piece of luggage, the two or more wheels permitting the first piece of luggage to roll when the handle is pulled;

a second piece of luggage comprising:

a second luggage body having a second height, greater than the first height;

two or more wheels at the a bottom of the second piece of luggage permitting the first piece of luggage to roll when the handle is pulled;

an attachment member configured to removably connect the first piece of luggage to the second piece of luggage to form a self-stabilizing luggage assembly in which the second piece of luggage tilts to contact the first piece of luggage, and remains tilted and in contact with the first piece of luggage regardless of whether the first piece of luggage is in a tilted or upright orientation and whether the luggage assembly is stationary or in motion.

2. A luggage assembly according to claim 1 , further comprising:

the attachment member couples to the handle.

3. A luggage assembly according to claim 1 , further comprising:

the attachment member comprises an attachment strap affixed to the second piece of luggage and configured to be wrapped around the handle.

4. A luggage assembly according to claim 3 , further comprising:

the second piece of luggage comprises a longitudinal center between a left side of the second piece of luggage and a right side of the second piece of luggage; and

the attachment strap includes two ends, one end of the two ends is affixed at a point spaced between the left side and the longitudinal center and the other end of the two ends is affixed at a point spaced between the right side and the longitudinal center.

5. A luggage assembly according to claim 4 , wherein the attachment strap is affixed to a back side of the second piece of luggage.

6. A luggage assembly according to claim 3 , wherein the attachment strap comprises:

a left segment and a right segment, each extending from the second piece of luggage to the handle of the first piece of luggage; and

an intermediate segment connecting the left and right segments and extending across the handle.

7. A luggage assembly according to claim 3 , further comprising:

the handle is a rigid extendable handle and the attachment strap is flexible.

8. A luggage assembly according to claim 1 , wherein a percentage of the weight of the second piece of luggage is at or behind at least one wheel of the two or more wheels at the bottom of the first piece of luggage when the first and second pieces of luggage are inclined in a rolling configuration.

9. A luggage assembly according to claim 1 , wherein the handle is substantially rigid and provides leverage for inclining the first and second pieces of luggage.

10. A luggage assembly according to claim 1 , the attachment member is dimensioned to engage the first piece of luggage in a manner that prevents the second piece of luggage from moving away from the first piece of luggage when the first and second pieces of luggage are inclined.

11. A luggage assembly according to claim 1 , further comprising the second piece of luggage has a weight, a portion of which rests in back of at least one wheel of the at least two wheels on the second piece of luggage, thereby tending to cause the second piece of luggage to press against the first piece of luggage.

12. A luggage assembly according to claim 1 , further comprising:

at least one of the group consisting of:

a mating strap on a front of the first piece of luggage, the attachment member comprising a mating hook to engage the mating strap; and

a first set of straps with connector portions on the first piece of luggage, the attachment member comprising a second set of straps with connector portions on the second piece of luggage to engage the connector portions on the first set of straps.

13. A method for forming a self-stabilized luggage train, the method comprising:

standing a first piece of luggage upright on a supporting surface, wherein the first piece of luggage comprises a first body and two or more wheels;

positioning a second piece of luggage on the supporting surface and leaning against the first piece of luggage, wherein the second piece of luggage comprises a second body, two or more wheels, and an attachment member connected to the second body;

connecting the attachment member to the first piece of luggage to form the self-stabilized luggage train, the attachment member connected in a manner that will substantially prevent the second piece of luggage from moving away from the first piece of luggage when the first and second pieces are inclined, the luggage train remaining self-stabilized while the first piece of luggage is upright and inclined, and while the luggage train is in motion and stationary; and

wherein to form the self-stabilized luggage train, the self-stabilized luggage train having a weight which is substantially supported by at least two of the wheels on the first piece of luggage and at least two of the wheels on the second piece of luggage.

14. A method according to claim 13 , wherein connecting the attachment member to the first piece of luggage to form the self-stabilized luggage train further comprises at least one of the group consisting of:

wrapping the attachment member around at a handle located at a top of the first piece of luggage;

engaging the attachment member with a mating strap on the body of the first piece of luggage, wherein the attachment member comprises a mating hook; and

engaging the attachment member with a first set of straps with first connector portions on the first piece of luggage, the attachment member comprising a second set of straps with second connector portions on the second piece of luggage that engage the first connector portions.