Snap-in type grommet

Claim 1

A RESILIENT GROMMET FOR APPLICATION TO A PERIPHERAL APERTURE IN A WORKPIECE OF ARCUATE CROSS SECTION INCLUDING A CIRCUITOUS BODY FOR SUPERIMPOSING THE EXTERNAL SURFACE OF A WORKPIECE ALONG THE MARGIN OF AN APERTURE THEREIN, THE UNDER SIDE OF SAID CIRCUITOUS BODY NORMALLY DEFINING A SURFACE OF TRANSVERSE ARCUATE SHAPE CONFORMING SUBSTANTIALLY WITH THE TRANSVERSE ARCUATE SHAPE OF A WORK SURFACE TO WHICH IT MAY BE APPLIED, FLANGE MEANS ALONG THE INNER MARGIN OF SAID BODY EXTENDING LATERALLY THEREOF FOR ENGAGING THE EDGE OF A WORKPIECE WHICH DEFINES A WORK APERTURE, A SUBSTANTIAL CIRCUITOUS PORTION OF THE PERIPHERAL SURFACE OF SAID FLANGE MEANS EXTENDING LATERALLY OF SAID BODY IN SUBSTANTIAL PARALLELISM WITH RADII OF THE ARC DEFINED BY THE UNDER SIDE OF SAID BODY, AND DIVERGING MEANS EXTENDING LATERALLY OF THE PLANE OF SAID BODY AND HAVING MEANS EXTENDING SUBSTANTIALLY PARALLEL TO THE PLANE OF THE BODY FOR SNAPPINGLY INTERLOCKING WITH THE EDGE OF A WORKPIECE SURROUNDING A WORK APERTURE TO SECURE THE GROMMET AGAINST UNAUTHORIZED DETACHMENT WHEN THE GROMMET IS FLATTENED SO THAT THE DIVERGING MEANS SNUGLY ENGAGES ADJACENT EDGES DEFINING THE APERTURE IN THE WORKPIECE.