Patent ID: 7967539

Claim:
A fastener, comprising: a head; and a snap-engagement foot, wherein said foot comprises: a rigid core, which extends from said head and terminates at a free end, and curved flexible wings, each said wing having a convex surface bordered by said core, by a longitudinal edge surface and by a transverse edge surface facing said head, wherein said foot is tapered respectively towards the free end of said core and towards said transverse edge surfaces of said wings on each side of an inflection plane that is transversely oriented to said core, each said longitudinal edge surface has a V-shape of which the point is directed outwardly and is located at said inflection plane, said core is a substantially cylindrical hub about which at least three said wings are regularly spaced, each said wing comprising: a web extending radially from the hub, an enlarged end portion extending radially further from the web, said enlarged end portion being thicker than the web, and a shoulder between the web and the enlarged end portion; wherein said enlarged end portion is delimited by said longitudinal edge surface of said wing on each side of said inflection plane and by said shoulder, and said shoulder and a surface of the enlarged end portion situated between said longitudinal edge surface and said shoulder are on the opposite side from said convex surface, and each said wing is adapted, in order to allow a snap engagement of said foot in a hole in a panel, to flex by elastic deformation towards the convex surface of the neighboring wing situated on the same side as said shoulder.