Patent ID: 7121556

Claim:
A gasket comprising: a body made from a single homogenous thermoplastic material having first and second substantially planar parallel surfaces defining at least one service aperture therethrough; and a sealing bead portion integral to said body and surrounding said service aperture, said sealing bead portion including a first outwardly extending bead extending from said first surface and a first concave channel formed in said second surface opposite said first outwardly extending bead and being concave reative to said second surface, said first concave channel being disposed between a second outwardly extending bead and a third outwardly extending bead extending from said second surface, a second concave channel opposite said second outwardly extending bead and being concave relative to said first surface and a third concave channel opposite said third outwardly extending bead and being concave relative to said first surface, wherein said first, second, and third outwardly extending beads are generally triangular in cross-section.