Patent ID: 7712618

Claim:
A cap configured to be mounted on a container having an internal volume, the cap comprising: a base comprising means for mounting the cap on the container; a lid; means for articulating the lid with respect to the base, between an open position and a folded-down position, defining an axis of rotation about which the lid can rotate; locking means for locking the lid with respect to the base in the folded-down position; unlocking means for unlocking the lid with respect to the base, which is antagonist to the locking means, arranged to be actuated manually, and movable to a final position at which the unlocking means triggers the lid to move toward the open position; wherein the articulation means is arranged to allow the lid to be propelled in rotation by a mechanical energy stored in at least one of the base and the lid due to deformation of at least one of the base and the lid toward the open position; the lid and the base are arranged to, in locked position elastically resist relative rotational movement between the lid and the base, and correspondingly store the mechanical energy through deformation of at least one of the base and the lid, the mechanical energy stored during deformation being enough to propel the lid in rotation toward the open position; and the unlocking means is arranged in the form of a detent, which when moved to the final position unlocks the locking means, causing movement of the lid relative to the base, the stored mechanical energy caused by the deformation being released propelling the lid in rotation toward the open position.