Folding shelf carriage

1. An apparatus to carry one or more retail shelves comprising a back;

a first side frame attached to said back by a first rotatable connection, wherein said first side frame comprises a first horizontal frame member located near a bottom of the apparatus and a first vertical frame member extending above said first horizontal frame member, and wherein the first vertical frame member comprises a plurality of first openings disposed across at least a portion of the first vertical frame member, and wherein each of the first openings is adapted to receive a first protrusion of a shelf;

a second side frame attached to said back by a second rotatable connection, wherein said second side frame comprises a second horizontal frame member located near the bottom of said apparatus and a second vertical frame member extending above said first horizontal frame member, and wherein the second vertical frame member comprises a plurality of second openings disposed across at least a portion of the second vertical frame member, and wherein each of the second openings is adapted to receive a second opposing protrusion of the shelf; and wherein the shelf is supported laterally by coupling a first protrusion of the shelf with one or more of the first openings of the first side frame and by coupling a second protrusion of the shelf with one or more of the second openings of the second side frame; and

a transverse frame member comprising a first end and a second opposing end; wherein said transverse frame member is attached at the said end to said first horizontal frame member by a third rotatable connection and is attachable at said second end to said second horizontal frame member by a releasable connection; and

wherein said apparatus is able to transition between an open state and a closed state;

and wherein in the open state, said transverse frame member is attached to said second horizontal frame member; and

wherein in the closed state, said transverse frame member is disconnected from said second horizontal frame member; and wherein said first side frame and said second side frame fold inwards toward said back, in the closed state.

2. The apparatus of claim 1 , wherein a first protrusion of the shelf comprises a first shelf hook, and wherein a second protrusion of the shelf comprises a second shelf hook, and wherein at least one of the first openings is dimensioned and arranged to receive a distal end of the first shelf hook; and wherein at least one of the second openings is dimensioned and arranged to receive a distal end of the second shelf hook.

3. The apparatus of claim 1 , wherein said first side frame comprises a first side rail and said second side frame comprises a second side rail.

4. The apparatus of claim 1 , further comprising one or more casters disposed on at least one of the first horizontal frame member or the second horizontal frame member.

5. The apparatus of claim 1 , further comprising at least one strap, wherein said strap is connectable between said back and said transverse frame member.

6. The apparatus of claim 1 further comprising at least one mobility component, wherein a mobility component allows movement of the apparatus.

7. The apparatus of claim 1 wherein the back comprises upper and lower back frame members and the first and second side frames are attached to the respective outer ends of the back frame members.

8. The apparatus of claim 1 , further comprising at least one strap, wherein said strap is connectable between said back and said transverse frame member.

9. The apparatus of claim 1 , wherein in the closed state, the transverse frame member rotates about the third rotatable connection to be disposed vertically.

10. A shelf carriage comprising:

a back comprising a plurality of back horizontal frame members;

a first side frame attached to said back by a first rotatable connection, wherein said first side frame comprises:

a first side horizontal frame member;

a first vertical frame member, wherein said first vertical frame member comprises a plurality of first openings, and wherein a first opening is adapted to receive a first protrusion of a shelf; and

a first side rail;

a second side frame attached to said back by a second rotatable connection, wherein said second side frame comprises:

a second side horizontal frame member;

a second vertical frame member, wherein said second vertical frame member comprises a plurality of second openings, and wherein a first opening is adapted to receive a second protrusion of a shelf; and wherein coupling at least a first protrusion of a shelf with a first opening and coupling at least a second protrusion of a shelf with a second opening laterally supports the shelf on the shelf carriage; and wherein the plurality of first openings and the plurality of second shelf support connections allows support of a plurality of shelves on said shelf carriage; and

a second side rail;

a transverse frame member comprising a rail with a first end and an opposing second end; wherein the first end of the transverse frame member is attached to a front end of said first side horizontal frame member by a third rotatable connection, and wherein the second end of the transverse frame member is attachable to a front of said second side horizontal frame member by a releasable connection;

wherein said shelf carriage is able to transition between an open state and a closed state;

and wherein in said open state said transverse frame member is attached to said second side horizontal frame member; and

wherein in said closed state said transverse frame member is unattached from said second side horizontal frame member, and said first side frame and said second side frame folded inward toward said back.

11. The shelf carriage of claim 10 , wherein when in said open condition said transverse frame member, a top surface of said first side horizontal frame member and a top surface of said second horizontal frame member are positioned to support at least one shelf.

12. The shelf carriage of claim 11 , wherein when in said open condition said first side vertical frame member, said first side rail, said second side vertical frame member and said second side rail are positioned to limit movement of at least one shelf.

13. The shelf carriage of claim 10 , wherein a depth between said transverse frame member and said back is based upon a shelf depth.

14. The shelf carriage of claim 10 , wherein a depth between said transverse frame member and said back is variable.

15. The shelf carriage of claim 10 , wherein a width between said first side rail and said second rail is based upon a shelf width.

16. The shelf carriage of claim 10 , wherein a width between said first side rail and said second rail is variable.

17. The shelf carriage of claim 10 , further comprising at least one strap, wherein said strap is connectable between said back and said transverse frame member.

18. The shelf carriage of claim 10 , wherein said first side rail is attached to an outside of said first side vertical frame member and an outside of said first side horizontal frame member and said second side rail is attached to an outside of said second side vertical frame member and an outside of said second side horizontal frame member.

19. The shelf carriage of claim 10 , further comprising one or more mobility components to allow movement of the apparatus.