Patent ID: 8910815

Claim:
A cover for an opening in a fuel system component, the cover comprising: a one-piece body of a first thermoplastic material constructed so that when assembled to a fuel system component the body has a central portion that extends over at least part of and closes an opening in the fuel system component, a homogeneously integral peripheral flange extending radially outwardly of the opening and having a generally radially extending bottom surface of the flange adjacent the fuel system component, at least one first connecting feature having a recess in the peripheral flange, the recess having a non-uniform section with a first portion of the section opening both through the bottom surface of the peripheral flange and into a second portion of the section within the peripheral flange that is radially enlarged relative to the first portion of the section and communicating within the peripheral flange with the first portion of the section, and an axial flange having a circumferentially continuous side surface extending generally axially relative to the bottom surface, and a circumferentially continuous seal ring of an elastomer different than the first thermoplastic material and at least chemically bonded with a mechanically interlocked molecular architecture circumferentially continuously to the bottom surface and circumferentially continuously to the side surface and providing a first annular sealing surface to bear against the fuel system component radially outwardly of the opening when the cover is mated therewith, and a second sealing surface to bear on a generally axially extending surface defining the periphery of the opening in the fuel system component, and the seal ring having at least one second integral connecting feature extending into, engaging, molded into and complimentary with the recess and having a stem projecting from the ring seal and terminating in a homogenously integral head projecting from the stem and radially enlarged relative to the stem, the stem received in, filling and engaging the first portion of the section and the homogenously integral enlarged head received in, filling and engaging the second portion of the section to at least mechanically connect the flange of the body and the seal ring together.