Patent ID: 6745486
Filing Date: 2004-06-08
Classification: A45D

Abstract:
A fingernail marking drill bit used in combination with a motorized handset, the drill bit comprising:(a) a shank having a proximal end and a distal end, the shank having a longitudinal axis defined by the proximal end and distal end; (b) a barrel, having a central axis, wherein the barrel has the shape of a hyperboloid, the barrel extending from the distal end of the shank, the central axis coinciding with the longitudinal axis of the shank, the barrel further having a top and a bottom, the bottom of the barrel adjacent to the distal end of the shank; (c) a first circular blade comprising a first scribing surface fashioned at the top of the barrel, and a second blade comprising a second scribing surface fashioned at the bottom of the barrel; (d) a gauging segment defined by the axial distance between the first blade and the second blade, wherein the gauging segment may be used to determine the length of a french manicure; (e) a first circular stop fashioned circumferentially at the top of the barrel adjacent to the first blade, the first circular stop having a smaller diameter than the first blade, such that the first circular stop limits the depth of penetration of the first blade; and (f) a second circular stop fashioned circumferentially at the bottom of the barrel adjacent to the second blade, the second circular stop having a smaller diameter than the second blade, such that the second circular stop limits the depth of penetration of the second blade.