Patent ID: 8534476

Claim:
A plastic shell for a two-piece push-and-turn child-resistant closure that includes, a peripheral skirt, and a base wall from which said peripheral skirt depends, said base wall having: a peripheral portion having a first thickness, a plurality of lugs disposed at least in part on said peripheral portion adjacent to said peripheral skirt, and a central portion having a second thickness less than said first thickness, and including a plurality of ribs separate from said lugs and having a third thickness greater than said second thickness and substantially equal to said first thickness and extending from said peripheral portion toward a center of said base wall, wherein said plurality of ribs is arranged in a spoke-like pattern, and said central portion also includes a plurality of webs extending between said plurality of ribs and establishing said second thickness, wherein ribs of said plurality of ribs are radially aligned with corresponding ones of said lugs so as to share common radial axes.