Patent ID: 8458861
Filing Date: 2013-06-11
Classification: B60P,B63B,B65D,Y10T

Abstract:
1. A coupling device for coupling an upper container to a lower container, comprising: a body part having a first rotating locking part rotatably mounted on the cam part, the first rotating locking part being adapted to prevent and release a vertical motion of the body part, and a second rotating locking part rotatably mounted on the fastening piece, the second rotating locking part being adapted to enable and prevent a lateral motion of the body part and to receive the substantially vertical forces between the upper and lower containers, wherein the second rotating locking part is capable of making direct contact with the first rotating locking part so that, when the first rotating locking part rotates, the second rotating locking part is also able to rotate, thereby enabling a locking mode and an unlocking mode.