Patent ID: 7891509

Claim:
A package having child-resistant and non-child-resistant modes of operation, which includes: a plastic container having a cylindrical finish with an open end, at least one first external thread on said finish, a circumferentially extending external first engagement element on said finish consisting of an external bead or at least one second external thread between said at least one first external thread and said open end, said external first engagement element having an outside diameter that is less than that of said first external thread, and a manually deflectable release element externally cantilevered from said finish on a side of said at least one first external thread remote from said open end, and a plastic closure having a base wall, a peripheral skirt with at least one first internal thread for engagement with said at least one first external thread on said finish in a child-resistant mode of operation, at least one locking lug on said skirt for releasable engagement with said release element in the child-resistant mode of operation in which said release element must be deflected to release said lug and enable said closure to be unthreaded from the container finish, an annular wall extending from said base wall in a direction opposite from said skirt, said annular wall being disposed radially inwardly from an outer peripheral edge of said base wall and said skirt, and an internal second engagement element on an inner surface of said annular wall consisting of an internal bead or at least one second internal thread for engagement with said external first engagement element on said finish in an inverted non-child-resistant mode of operation of said closure in which said closure may be removed from said container by disengagement of said first and second engagement elements, said finish having a first portion adjacent to said open end on which said first engagement element is disposed and a second portion spaced from said open end on which said at least one first external thread is disposed, said second portion having an outer diameter that is greater than that of said first portion.