IP Library › Patent Application 13726536
Patent Application
App. No. 13/726,536

FLAT DRILL END OF A SCREW

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Quick Facts
Patent No.
US None
App. No.
13/726,536
Abstract

A flat drill end of a screw mainly includes a cylinder with a drill end having a thread wrapped around the cylinder, and a flat drill portion formed to the cylinder along to the drill end of the cylinder with a predetermined length. The thickness of the flat drill portion is less than a half of the width of the flat drill portion for receiving more debris and ejecting the debris during the drilling so as to form a drill screw capable of drilling fast and preventing split on to the working piece.

Claims (8)

1 . A flat drill end of a screw comprising:

a cylinder having a drill end and a thread wrapped around the cylinder;

a flat drill portion formed to the cylinder along to the drill end of the cylinder with a predetermined length;

wherein the thickness of the flat drill portion is less than a half of the width of the flat drill portion.

2 . The flat drill end of a screw as claimed in claim 1 , wherein two lateral edges of the flat drill portion are formed as sharp blades.

3 . The flat drill end of a screw as claimed in claim 1 , wherein two lateral surfaces of the flat drill portion are both plane.

4 . The flat drill end of a screw as claimed in claim 1 , wherein two lateral surfaces of the flat drill portion are a plane and a curved plane respectively.

5 . The flat drill end of a screw as claimed in claim 1 , wherein two lateral surfaces of the flat drill portion are both curved plane.