US Patent 8636167 Self-actuating closure mechanisms for closeable articles

A container assembly comprising a body and interlocking and self-actuating lid. The body has a bottom and at least one sidewall extending generally upwardly and includes at least one body interlock piece. The lid includes a lid interlock piece configured to releasably engage the body interlock piece. A first magnet is coupled to the body and a second magnet is coupled to the lid. The first and second magnet magnetically generate a first relative movement of the body and lid in a first direction when the first and second magnet are in a first orientation, wherein the first relative movement operatively engages the lid interlock piece with the body interlock piece. Additionally, the interengagement of the lid interlock piece and the body interlock piece during the first relative movement of the body and lid mechanically generate a second relative movement of the body and lid in a second direction.