Patent ID: 6652208
Filing Date: 2003-11-25
Classification: F16B

Abstract:
A fastener device for attaching a rear face of a panel of semi-rigid material to a substrate, comprising:an anchor part for attachment to the substrate; a screw part having an inner end adapted to be held by said anchor part in such manner as to be rotatable relative to the substrate when said anchor part is attached to said substrate, said screw part having a helical member with a leading edge capable of cutting into semi-rigid material, whereby an outer end of said screw part is capable of penetrating the rear face of a said panel upon rotation of said helical member; drive means for rotating said screw part, said drive means including a non-circular recess open to an outer end of said screw part and suitable for engagement by a non-circular end of a drive rod extending through a transverse bore in the panel, such that rotation of the drive rod at the front face of the panel can cause the helical member to penetrate and engage a rear portion of the panel, said drive means allowing removal of the drive rod from said screw part after the panel has been secured so that the fastener is essentially concealed within the panel; said non-circular recess being sized to allow engagement and rotation by a drive rod having a diameter which is less than 1/8 the diameter of said helical member so as to require only a similarly small diameter bore in the panel, whereby the fastener is essentially concealed within the panel after removal of the drive rod.