Patent ID: 8915388

Claim:
A child-resistant package comprises a vial formed to include a product-storage chamber and a mouth opening into the product-storage chamber, a closure configured to mount on the vial to assume an installed position closing the mouth formed in the vial when rotated relative to the vial about a vertical axis of rotation in a clockwise closure-installation direction, and a closure-release control mechanism comprising a rotation-blocking stop coupled to the closure to rotate therewith about the vertical axis of rotation during installation of the closure on the vial and removal of the closure from the vial, a movable release element mounted on the vial for radial movement relative to the vial toward the vertical axis of rotation, and a locking tab located between the vial and the movable release element and arranged to engage the rotation-blocking stop to block rotation of the closure about the vertical axis of rotation in a counterclockwise closure-removal direction normally to retain the closure in the installed position on the vial, the locking tab including a sloped upper surface and a stop surface, wherein the locking tab is mounted on the vial for pivotable movement about a horizontal pivot axis during exposure to a first pivot-inducing force applied to the sloped upper surface included in the locking tab by the rotation-blocking stop during rotation of the closure about the vertical axis of rotation in the clockwise closure-installation direction to free the rotation-blocking stop to confront the stop surface included in the locking tab upon arrival of the closure at the installed position on the vial, wherein the locking tab is mounted on the vial also for pivotable movement about a vertical pivot axis that is substantially perpendicular to the horizontal pivot axis during exposure to a second pivot-inducing force applied to the locking tab by the movable release element during movement of the movable release element relative to the vial in a radially inward direction toward the vertical axis of rotation to move the stop surface included in the locking tab away from confronting relation with the rotation-blocking stop to locate the locking tab between the vertical axis of rotation and the rotation-blocking stop to free the closure for rotation about the vertical axis of rotation in the counterclockwise closure-removal direction relative to the vial during removal of the closure from the vial; and wherein the moveable release element is coupled to first and second wall members which are configured to prevent any downward movement of the moveable release element when the moveable release element is moved in the radially inward direction.