Self drilling screw
AssigneeIPH International Pty Ltd
InventorRameshkumara Ramachandran
Life of this patent
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Abstract
A self-drilling screw, particularly for use in a security screen employing leveraged clamping. The self-drilling screw comprises a head and a shank. A drill bit is formed at one end of the shank away from the head with a thread extending along the full length of the shank, including the drill bit. The thread on the drill bit increases holding strength.
Claims11
A self-drilling screw comprising:
- a head and a shank;
- a drill bit formed at one end of the shank away from the head;
- and
- a thread extending along the full length of the shank and the drill bit such that the thread terminates at a distal end of the drill bit;
- wherein the thread extending along the drill bit decreases in pitch as it moves away from the head.
The self-drilling screw of claim wherein the drill bit has a larger diameter than the remainder of the shank.
The self-drilling screw of claim wherein the drill bit has a smaller diameter than the remainder of the shank.
The self-drilling screw of claim wherein a fastening tool engagement portion is formed in the head.
The self-drilling screw of claim formed from hardened metal.
In combination:
- a security screen frame haying a flange extending from a wall of a channel section;
- a clamp haying a clamp element complementary to the flange;
- a mesh for capture between the clamp element and the flange;
- and
- a self-drilling screw that fastens the clamp element to the flange and thereby capture the mesh.
Dependencies are inferred from the claim text.