Tamperproof cover

Claim 1

A removable and replaceable tamperproof cover for a container having a cylindrical mounting cup with a peripheral undersurface defined by a peripheral outer edge located near the outlet end of the container, said cover including: a top wall, a relatively thin flexible outer sleeve depending from said top wall, a relatively thin flexible inner sleeve generally coaxial with said outer sleeve and also depending from said top wall, an inwardly projecting locking flange carried by said inner sleeve, said locking flange being generally trapezoidal in cross section with the longer base of the flange formed integrally with the inner sleeve and the shorter end of the flange extending inwardly of the peripheral outer edge and under the peripheral undersurface of the container mounting cup when the cover is initially installed on the container, said locking flange and said peripheral outer edge of the container mounting cup being located relative to each other in said installed position of the cover so that at least a portion of the locking flange is removed by said peripheral outer edge when the cover is removed for the first time from the container, said locking flange being formed and adapted so that the portion thereof remaining after initial removal of the cover provides sufficient engagement with the container mounting cup upon re-installation of the cover on the container that the cover cannot readily be removed by a child but requires squeezing and manipulation ordinarily beyond the ability of a child for removal, a lifting pad located on the outer surface of the outer sleeve and having a lifting surface located above the lower edge of the outer sleeve, and at least one web connecting said inner and outer sleeves with said at least one web being located adjacent said lifting pad and forming a connection between the inner and outer sleeves.