Patent ID: 8375514

Claim:
A fastening assembly for securing a floor mat with a floor mat attachment hole therein to a carpet with a carpet attachment hole therein, the fastening assembly comprising: a first fastener attached to a peripheral portion of the carpet attachment hole; a knob attached to the first fastener; and a second fastener attached to a peripheral portion of the floor mat attachment hole, the second fastener including a peripheral portion defining a center through-hole; and wherein: the first fastener comprises a first carpet grommet and a second carpet grommet, clampable to opposite sides of the peripheral portion of the carpet attachment hole, the first carpet grommet includes a first carpet grommet flange and the second carpet grommet includes a second carpet grommet flange for abutting against the peripheral portion of the first attachment hole; the second carpet grommet further includes a knob base projecting from the second carpet grommet flange as a tubular body and defining an axial knob acceptance hole, the knob base includes a first latch part on the outside of the tubular body and a knob coupling pawl located on the inside of the tubular body; the first carpet grommet further includes a through hole formed to fit over the knob base and a second latch part for engaging the first latch part of the first carpet grommet and thereby securing the first carpet grommet to the second carpet grommet; and the knob includes a knob head and a knob shank, and the knob shank is inserted into the knob base, wherein the knob coupling pawls of the knob body engages a latching shoulder on the knob shank so that the knob is axially retained inside the knob base and the knob is turnable about its axis between one of an unlocked position, in which the second fastener is not latched thereto, and a locked position, wherein the knob head overrides the peripheral portion of the through hole in the second fastener and thereby secures the second fastener to the first fastener.