Patent ID: 7008159
Filing Date: 2006-03-07
Classification: F16B

Abstract:
1. A combination of a screw grommet and an associated tapping screw, wherein the screw grommet comprises a shank to be inserted into a mounting hole in a workpiece and a flange formed at one end of the shank that is larger than the mounting hole in the workpiece, wherein a cavity is formed in the flange and the shank into which the tapping screw can be screwed to join a mounted member to the workpiece, wherein the shank has a rectangular cross-section appropriate for a rectangular cross-section mounting hole in the workpiece, wherein both the flange, and a section of the shank that extends from the flange a distance that is substantially less than the length of the shank, are divided by a plurality of axial slits that extend completely through the flanged the shank, to allow a section of the shank to widen in a direction perpendicular to the axial direction of the shank by screwing the tapping screw into the cavity, wherein protrusions project from outer peripheral surfaces of the shank separated axially from the flange by about the thickness of the workpiece, wherein the protrusions are arranged diagonally to one another in the rectangular cross-section of the shank, wherein the axial slits are formed in positions corresponding to the center of all sides of the periphery of the rectangular cross-section of the flange and the shank and are spaced from the protrusions so that there are portions of the shank between the slits and the protrusions, wherein the protrusions have an L-shaped cross-section embracing corresponding corners of the rectangular cross-section of the shank , wherein the slits terminate at about the middle of the axial length of a portion of the cavity engaged by threads of the screw, and wherein a section of the cavity extending axially without slits toward the tip of the shank has a length able to accommodate at least one pitch length of the screwed in tapping screw.