Chain lid fastener

Claim 1

A chain guard fastener for fastening a bicycle chain guard to a tubular element of a bicycle, said chain guard fastener comprising: a fastening means and a bolt, said bolt having a first end and a second end; said fastening means including a key projected in front thereof; said key matching a keyway on a bicycle chain guard; said fastening means being made of molded plastic, having two symmetrically disposed faces and a contact area including a median split for attachment to a chain guard; the contact area being symmetrically structured and including a first hole and a second hole formed longitudinally therethrough; said holes each diverging laterally to form a detent cavity on each outer end of said fastening means; the first one of said cavities having an annular surface forming an arcuated inclined continuous denticulation around the periphery of said first hole; said compression bolt having an enlarged guard plate on the first end thereof; said compression bolt having a compression member on the second end thereof; said compression member having on the interior thereof a pair of projecting teeth which are vertically aligned; said compression member having on the backside thereof an outstanding knob; a cylindrical form projecting from said symmetrically disposed faces; said two holes traversing said fastening means so as to permit passage of said bolt so as to cause the first end of said bolt to be stopped at a dead-point by the other of said cavities; the projecting teeth on the second end of said bolt being carried to the continuous denticulated first cavity on said first hole for rotatable, lacking engagement therewith.