Patent ID: 8215662

Claim:
A multi-cart system for wheeled carts, comprising: a first cart having a frame member; a coupling member on the first cart having a connection end and an insertion end, the first cart coupling member connection end being coupled to the first cart frame member, the first cart coupling member having a generally rectangular shape with a top portion and opposing left and right side portions, the first cart coupling member having a predetermined length and width and a predetermined thickness, the first cart coupling member having an aperture in one of the opposing side portions proximate the insertion end of the first cart coupling member; a second cart having a frame member; a receiver portion in the second cart frame member sized to slideably receive the insertion end of the first cart coupling member, the second cart receiver portion having a width corresponding to the first cart coupling member width to thereby permit the insertion of the first cart coupling member into the second cart receiver portion but which limits any transverse articulation of the first cart coupling member in the second cart receiver portion, the second cart receiver portion having a height sufficiently greater than the first cart coupling member thickness to thereby permit longitudinal articulation of the first and second carts with respect to each other; and a lock pin in the second cart frame member to engage the first cart coupling member aperture when the insertion end of the first cart coupling member is fully inserted into the second cart receiver portion to thereby retain the insertion end of the first cart coupling member within the second cart receiver portion, the second cart lock pin being positioned to move within the first cart coupling member aperture to thereby permit torsional articulation of the first and second carts with respect to each other.