Patent ID: 9181970
Filing Date: 2015-11-10
Classification: F16B

Abstract:
1. A drilling screw, comprising a screw shank, a drill bit, configured on a front end of the screw shank, the drill bit having two cutting edges, a screw thread, which begins at an axial distance behind the cutting edges, and which has a thread edge, and in which a radial distance of the thread edge from a longitudinal axis of the screw increases from a beginning of the thread, wherein a constriction is configured behind the drill bit, in which a diameter of the screw is smaller than a hole formed by the drill bit and is smaller than a core diameter of the screw shank, the screw shank core diameter being otherwise constant in an area of the screw shank including the screw thread, wherein an outer diameter of the drill bit equals a core diameter of the screw thread, further wherein the screw thread begins within the constriction.