Patent ID: 7752718

Claim:
A molded polymer snap fastener, comprising: a male portion having a first mating surface and a rivet shaft extending outwardly away from the mating surface; a female portion having a second mating surface defining an opening therein, the opening being dimensioned to receive the rivet shaft therein; one of the male portion or the female portion presenting a cup portion and the other of the male portion or the female portion presenting a stud portion, the stud portion being structured to be snapably receivable in the cup portion wherein the stud portion or the cup portion can be releasably coupled to a second molded polymer snap fastener; the first mating surface having a plurality of first barbs extending outwardly therefrom, the first barbs each having a first radius R 1 ; the second mating surface having a plurality of second barbs extending outwardly therefrom, the second barbs having a second radius R 2 ; the first barbs being arranged along a first substantially circular line substantially concentric with the rivet shaft, the first substantially circular line having a third radius R 3 ; the second barbs being arranged along a second substantially circular line substantially concentric with the opening, the second substantially circular line having a fourth radius R 4 ; and wherein the third radius R 3 is different from the fourth radius R 4 and wherein the second barbs and the first barbs are arranged such that each of the second barbs fall into a space between adjacent barbs of the first barbs generally along the first substantially circular line when the male portion and the female portion are mated and the rivet shaft is inserted into the opening.