Child resistant container and closure, package and method of assembly having a locking tab on the container and a cam stop lug on the closure

摘要

A child resistant container and closure package includes a container of one-piece integrally molded plastic construction having a cylindrical finish, a shoulder connecting the finish to a side wall, a ring externally extending around the finish, and a tab extending from the ring and separated from the finish by a tangential slot. A stop lug is cantilevered from the tab and has oppositely oriented stop and cam faces. One or two ribs extend tangentially along an undersurface of the tab. A closure has a base wall with a peripheral skirt and an internal thread for securement to an external thread on the container finish. A pair of diametrically opposed internal lugs on the skirt have circumferentially oriented compound cam surfaces to cooperate with a cam surface on the stop lug on the container tab to bend the stop lug as the closure is applied to the container finish, and a circumferentially oriented abutment surface to cooperate with a stop face on the container stop lug against removal of the closure from the container finish absent depression of the container tab toward the container shoulder. The ribs extending tangentially along the undersurface of the tab function both to strengthen the tab during such depression and as an abutment stop against the container shoulder during bending depression of the tab to remove the closure.